| Patent application number | Description | Published |
|---|
| 20080245558 | VIA STRUCTURE OF PRINTED CIRCUIT BOARD - A printed circuit board ( | 10-09-2008 |
| 20080259553 | MOTHERBOARD - An exemplary motherboard includes a first slot arranged for mounting a first type of memory, a second slot arranged for mounting a second type of memory, a voltage regulator electronically connected to the first slot and the second slot, and a serial presence detect (SPD) unit connected to the voltage regulator. The first memory and the second memory alternatively mounted on the motherboard, the SPD detects which type of memory is mounted on the motherboard, and the voltage regulator outputs voltages suitable for the type of the memory mounted on the motherboard according to a detection result of the SPD. | 10-23-2008 |
| 20080284538 | PRINTED CIRCUIT BOARD - A printed circuit board includes a signal layer, a first reference plane layer, and a second reference plane layer. At least one transmission line is arranged on the signal layer. The transmission line includes a main transmission line, and two branch transmission lines connected to an end of the main transmission line. The first reference plane layer is disposed below the signal layer for the main transmission line. The second reference plane layer is disposed below the first reference plane layer for the branch transmission lines, to increase impedance of the two branch transmission lines. | 11-20-2008 |
| 20080309354 | METHOD AND APPARATUS FOR TESTING CHARACTERISTIC IMPEDANCE OF TRANSMISSION LINES - An apparatus for testing characteristic impedance of transmission lines includes a variable resistor, a first comparator, a second comparator, and a counter. One terminal of the variable resistor is coupled to a signal source, another terminal of the variable resistor is coupled to one terminal of a transmission line, and another terminal of the transmission line is idle. The one terminal of the transmission line is coupled to the input terminals of the first and second comparators. The output terminals of the first and second comparators are respectively coupled to input terminals of the counter. An output terminal of the counter is coupled to an adjusting terminal of the variable resistor, the counter adjusts the resistance of the variable resistor according to signals output from the first and second comparators. | 12-18-2008 |
| 20090024341 | SYSTEM AND METHOD FOR ANALYZING A SIGNAL DISPLAYING A NON-MONOTONIC TRANSITION - A system for analyzing non-monotonic of signals is provided. The system is configured for receiving a signal and displaying changes of the signal using a waveform curve. The system is configured for analyzing data of the signals and the waveform curve in order to locate peak points on the waveform curve. The system is also configured for storing the signal data and data generated during the analyzing process. A related method is also provided. | 01-22-2009 |
| 20090044968 | FLEXIBLE PRINTED CIRCUIT BOARD - An exemplary FPCB includes a signal layer having a differential pair consisting of two transmission lines arranged therein, a ground layer, and a dielectric layer lying between the signal layer and the ground layer. Two sheets made of conductive materials are respectively arranged at opposite sides of the differential pair, and both connected to ground. The sheets are apart from and parallel to the transmission lines. The ground layer has a void defined therein, and the void is located under the two transmission lines. | 02-19-2009 |
| 20090046418 | MOTHERBOARD FOR SUPPORTING DIFFERENT TYPES OF MEMORIES - An exemplary motherboard includes a first slot arranged for mounting a first type of memory, a second slot arranged for mounting a second type of memory, and a voltage regulator electronically connected to the first slot and the second slot. The first memory and the second memory are alternatively mounted on the motherboard, the voltage regulator detects which type memory is currently mounted on the motherboard and outputs voltages suitable for the type of the memory mounted on the motherboard accordingly. | 02-19-2009 |
| 20090056983 | PRINTED CIRCUIT BOARD - A printed circuit board (PCB) includes first and second signal layers sandwiching a dielectric layer therebetween and a first differential pair and a second differential pair each having a positive differential trace and a negative differential trace. The positive differential traces of the two differential pairs are disposed within the first signal layer. The negative differential traces of the two differential pairs are disposed within the second signal layer. The positive differential trace of the first differential pair is defined at the left side of the positive differential trace of the second differential pair. The negative differential trace of the first differential pair is defined at the right side of the negative differential trace of the second differential pair. | 03-05-2009 |
| 20090065238 | PRINTED CIRCUIT BOARD - An exemplary PCB includes a first reference layer, a first signal layer, a second signal layer, and a third signal layer in that order, a first differential pair is arranged in the first signal layer in edge-coupled structure and references the first reference layer, a distance between the first signal layer and the second signal layer is greater than a distance between the first reference layer and the first signal layer, a second differential pair is arranged in the second signal layer and the third signal layer in broad-coupled structure. The PCB has a high density layout of transmission lines. | 03-12-2009 |
| 20090065241 | PRINTED CIRCUIT BOARD - A printed circuit board (PCB) includes first and second signal layers sandwiching a dielectric layer therebetween, and a differential pair having two differential traces respectively disposed within the first and second signal layers. Two ground parts are respectively arranged at opposite sides of each of the two differential traces. | 03-12-2009 |
| 20090076751 | SYSTEMS AND METHODS FOR MEASURING SIGNAL WAVEFORMS - A system for measuring a signal waveform is provided. The system comprises a parameter receiving module, a waveform receiving module, a waveform filter, and a data storing module. The parameter receiving module is configured for receiving one or more filtration conditions. The waveform receiving module is configured for receiving the signal waveform. The waveform filter is configured for filtering the signal waveform to obtain a desired waveform. The data storing module is configured for storing the desired waveform into a storage device. | 03-19-2009 |
| 20090076778 | SYSTEM AND METHOD FOR DESIGNING A VOLTAGE REGULATOR MODULE - A computer-implemented method for designing a voltage regulator module (VRM) is disclosed. The method includes receiving design parameters and a component data for each component and storing the design parameters and the component data for each component into a component selection table, calculating a work efficiency of the VRM, and storing the work efficiency into a power computation table. The method further includes simulating a derating of each component according to a corresponding rated stress of each component if the work efficiency is greater than or equal to a predetermined work efficiency, calculating a stress ratio of each component, and storing the stress ratio into a component derating table. The component selection table, the power computation table and the component derating table are stored to form a desired VRM model if the stress ratio of each component meets a corresponding derating specification. | 03-19-2009 |
| 20090078452 | FLEXIBLE PRINTED CIRCUIT BOARD - An exemplary FPCB includes a differential pair consisting of a first transmission line and a second transmission line, a signal layer with the first transmission line arranged therein, a ground layer having a void which includes the area beneath the first transmission line, and a dielectric layer lying between the signal layer and the ground layer. The second transmission line is arranged in the ground layer offset from the first transmission line in the horizontal direction. The FPCB can transmit high speed signals. | 03-26-2009 |
| 20090086452 | PRINTED CIRCUIT BOARD - A printed circuit board (PCB) includes parallel first and second signal layers sandwiching a dielectric layer therebetween, and a differential pair having two differential traces respectively disposed within the first and second signal layers at least partially overlapping in vertical alignment. Horizontal distance between midlines of the two differential traces is less than the width of either of the two differential traces. | 04-02-2009 |
| 20090086561 | MOTHERBOARD FOR SUPPORTING DIFFERENT TYPES OF MEMORIES - An exemplary motherboard includes a driving module, a first slot module arranged for mounting a first type of memory and connected to the driving module via a first channel, a second slot module arranged for mounting a second type of memory and connected to the driving module via a second channel, and a voltage regulator electronically connected to the first slot module and the second slot module. The first memory and the second memory are alternatively mounted on the motherboard, the voltage regulator detects which type memory is currently mounted on the motherboard and outputs voltages suitable for the type of the memory mounted on the motherboard accordingly. | 04-02-2009 |
| 20090089474 | MOTHERBOARD FOR SUPPORTING DIFFERENT TYPES OF MEMORY - An exemplary motherboard for supporting different types of memory includes a driving module, a first slot, a second slot, and a transmission line connected the driving module, the first slot and the second slot in turn. The first slot is arranged for mounting a first type of memory. The second slot is arranged for mounting a second type of memory. The first memory and the second memory are alternatively mounted on the motherboard. The transmission line is grounded via a capacitor for eliminating echo signals generated by the first and second type memories. The motherboard for supporting different memory modes satisfies different type memories, and maintains integrality of signals transmitted therein. | 04-02-2009 |
| 20090102535 | CLOCK SIGNAL CIRCUIT FOR MULTIPLE LOADS - A clock signal circuit for multiple loads includes a clock generator and M loads. The clock generator includes N clock generator pins which output clock signals having a same frequency. The N clock generator pins are all connected to a connection point. The connection point is connected to M loads via M transmitting lines respectively, wherein M is larger than N, M and N each is an integer greater than 2. | 04-23-2009 |
| 20090103385 | MOTHERBOARD FOR SUPPORTING DIFFERENT TYPES OF MEMORIES - An exemplary motherboard includes a driving module, at least two first slots arranged for mounting two first type of memories, at least two second slots arranged for mounting two second type of memories, and a voltage regulator. The driving module is electronically connected to the at least two first slots, the at least two second slots, and the voltage regulator in turn via a channel. The first type of memories and the second type of memories are alternatively mounted on the motherboard, the voltage regulator detects which type memory is currently mounted on the motherboard and outputs voltages suitable for the type of memory mounted on the motherboard accordingly. | 04-23-2009 |
| 20090108956 | CIRCUIT TOPOLOGY FOR MULTIPLE LOADS - A circuit topology for multiple loads includes a driving terminal, a first node coupled to the driving terminal and a second node via a first branch transmission line, a first receiving terminal which is a test point configured to detect errors of the circuit topology coupled to the first node via a second branch transmission line, a second and a third receiving terminal respectively coupled to the second node via a third branch transmission line and a fourth branch transmission line, wherein the difference between the length of the second branch transmitting line and that of the third branch transmitting line, and the difference between the length of the third branch transmitting line and that of the fourth branch transmitting line are greater than the product of a transmission speed and a rise time of the signal, and a first resistor is connected in the third branch transmission line. | 04-30-2009 |
| 20090112497 | SYSTEM AND METHOD FOR AUTOMATIC VOLTAGE MEASUREMENTS OF AN ELECTRONIC SIGNAL - A computer-based method for measuring a ringup, a ringdown and a ringback of an electronic signal is provided. The method includes fitting a ringdown fitting curve to approximate a first ringdown data, and fitting a ringup fitting curve to approximate a first ringup data. The method further includes calculating an approximate ringdown value according to the ringdown fitting curve, and calculating an approximate ringup value according to the ringup fitting curve. The approximate ringup and ringdown values are then used to obtain an accurate ringup value and an accurate ringup value respectively. An accurate ringback value is calculated by subtracting the accurate ringup value from the accurate ringdown value. | 04-30-2009 |
| 20090146759 | CIRCUIT TOPOLOGY FOR MULTIPLE LOADS - A circuit topology for multiple loads includes a driving terminal, a first node coupled to the driving terminal via a main transmission line, a second node coupled to the first node via a first branch transmission line, a first receiving terminal coupled to the first node via a second branch transmission line, a third node coupled to the second node via a third branch transmission line, and a second receiving terminal coupled to the second node via a fourth branch transmission line. The second branch transmission line is longer than the first transmission line, and a first resistor is connected in the second branch transmission line. The third branch transmission line is longer than the fourth branch transmission line, and a second resistor is connected in the third branch transmission line. | 06-11-2009 |
| 20090166058 | PRINTED CIRCUIT BOARD - A printed circuit board (PCB) includes a power layer having a base portion, and at least two extending portions. The at least two extending portions are extended from edges near at least one corner of the base portion for preventing the PCB from forming constructive interferences and lowering the resonance magnitude thereof. | 07-02-2009 |
| 20090240450 | SYSTEM AND METHOD FOR EVALUATING A TEMPERATURE RISE OF A PRINTED CIRCUIT BOARD TRACE - A method for evaluating a temperature rise of a printed circuit board (PCB) trace receives a plurality of attribute parameters of the PCB trace. A temperature rise formula is determined for the PCB trace. The method further calculates the temperature rise by applying the temperature rise formula, and outputs the temperature rise. | 09-24-2009 |
| 20090242244 | PRINTED CIRCUIT BOARD - An exemplary PCB includes a first reference layer, a first signal layer, and a second signal layer in that order. A first differential pair is arranged in the first signal layer in an edge-coupled structure referencing the first reference layer. A second differential pair is arranged in the second signal layer in edge-coupled structure. A first ground part and a second ground part are symmetrically arranged at opposite sides of the second differential pair in the second signal layer. The first differential pair is arranged above the first ground part and a projection of the first differential pair onto the second signal layer having an area coincident with the first ground part. The second differential pair references the first and second ground parts. | 10-01-2009 |
| 20090259984 | METHOD OF PRINTED CIRCUIT BOARDS - A design method of printed circuit boards includes the following steps. First, simulate a printed circuit board including power layers, and vias connected to all the power layers. Then, change connections of the vias that tend to draw too much current to be connected to fewer power layers, than the vias that tend to draw less current. Repeat adjusting connections of the vias until all vias draw a similar amount of current such that no via draws more current than an upper limit the vias are designed for. Finally, according to the results, design/fabricate a PCB with vias respectively insulated, as needed, from the power layers that do not need to be connected to the vias. | 10-15-2009 |
| 20090260859 | FLEXIBLE PRINTED CIRCUIT BOARD - A flexible printed circuit board (FPCB) includes a signal layer comprising a differential pair, a ground layer comprising a grounded sheet made of conductive material, and a dielectric layer located between the signal layer and the ground layer. A void is located on the two opposite sides of the grounded sheet in the ground layer. The differential pair comprises two transmission lines and each transmission line is capable of transmitting a differential signal. The distances between the middle line of the grounded sheet and the middle line of each of the two transmission lines are equal. | 10-22-2009 |
| 20090260860 | FLEXIBLE PRINTED CIRCUIT BOARD - An exemplary FPCB includes two or more dielectric layers. Each dielectric layer is located between a signal layer and a ground layer. A differential pair including two transmission lines is arranged in each signal layer. Each ground layer includes one or more voids defined therein. Each void is opposite and adjacent to a differential pair. | 10-22-2009 |
| 20090278633 | EQUALIZER AND CONNECTOR INCLUDING THE SAME - An equalizer includes a first resistor and a capacitor connected in parallel. The positive terminal of the capacitor is connected to a signal transmission line on a blah printed circuit board. The negative terminal of the capacitor is connected to ground through a second resistor. A connector including the equalizer and a printed circuit board including the connector are also provided. | 11-12-2009 |
| 20090294168 | PRINTED CIRCUIT BOARD - A printed circuit board includes a first layout layer, a second layout layer, a copper foil layer, a first via and a second via. The first layout layer has a first signal line and a second signal line, each of which has a curved first portion. The second layout layer has a third signal line and a fourth signal line, each of which also has a curved first portion. The curved first portions of the first signal line, the second signal line, the third signal line and the fourth signal line are coupled to the first via and the second via. In this case, the curved first portions of the first signal line, the second signal line, the third signal line and the fourth signal line cooperatively generate spiral inductance characteristic. | 12-03-2009 |
| 20100007429 | PRINTED CIRCUIT BOARD - A printed circuit board includes a plurality of differential pairs arranged thereon side-by-side. Each differential pair includes two transmission lines. Each transmission line includes a plurality of sections of equal length. Every two adjacent sections in each transmission line meet at an angle, and all angles are equal. The length of each section is determined by dividing the distance between two corresponding angles of the two transmission lines of each differential pair by the cosine of half of the angle. | 01-14-2010 |
| 20100012363 | PRINTED CIRCUIT BOARD AND LAYOUT METHOD THEREOF - A printed circuit board coupling includes a first layout layer, a second layout layer, a pair of connecting portions, a first component and a second component. The first layout layer has a pair of first conducting portions which is disposed thereon to couple with a control chip. The second layout layer has a pair of second conducting portions, third conducting portions, and fourth conducting portions all of which are sequentially disposed thereon. The connecting portions are coupled with the first conducting portions and the third conducting portions. In a first coupling mode, an electronic device is coupled with the second conducting portions, and first and second components are coupled with the third and fourth conducting portions. In a second coupling mode, the electronic device is coupled with the fourth conducting portions, and the first and the second components are coupled with the second and third conducting portions. | 01-21-2010 |
| 20100012365 | PRINTED CIRCUIT BOARD - A printed circuit board includes first and second connector pads, first and second connection components, and first, second, and third transmission lines. A method for supporting two connectors on the printed circuit board is also provided. The printed circuit board is capable of supporting different types of connectors by setting the first and second connection components on the printed circuit board. | 01-21-2010 |
| 20100050136 | SYSTEM AND METHOD FOR OPTIMIZING ANALOG CIRCUIT DESIGNS - A system for optimizing analog circuit designs includes an input device, a data processing device, and a data storage device. The data processing device includes a selecting module, a calculation module, and a determining module. The selecting module is for receiving input from the input device and selecting electronic components composing the circuit from the data storage device. The calculation module is for calculating average values and standard deviations of each electronic component, generating normal distribution samples of each electronic component, and calculating output voltages of the circuit. The determining module is for determining whether the circuit meets a process capability standard. | 02-25-2010 |
| 20100052422 | PRINTED CIRCUIT BOARD AND OPTIMIZATION METHOD FOR A SENSE LOCATION ON THE PRINTED CIRCUIT BOARD - A print circuit board (PCB) includes a voltage regulator module (VRM), a plurality of loads, and a sense location for augmenting the voltage margin of the loads. The VRM is configured for charging the loads. Each load has a weight. The voltage value of the sense location equals to a summation of a corresponding weight value of a corresponding load multiplied by a corresponding voltage value of the load, for each of the plurality of loads on the PCB. An optimization method for the sense location on the PCB is also provided. | 03-04-2010 |
| 20100101837 | PRINTED CIRCUIT BOARD - A printed circuit board includes a reference layer, at least one first hole defined in the reference layer and adjacent from a first pin in a first column of pins of an electronic component, and at least one second hole defined in the reference layer and adjacent from a second pin of the electronic component. The at least one second hole is defined in the reference layer and opposite to the at least one first hole. The second pin is in a neighboring second column of pins from the first column of pins. A diameter of the at least one first hole is greater than a diameter of the at least one second hole such that a difference in current flowing through the first pin and the second pin is reduced. | 04-29-2010 |
| 20100237961 | DIFFERENTIAL SIGNAL TRANSMISSION CABLE AND METHOD FOR COMPENSATING LENGTH OFFSET THEREOF - A compensation method compensates for a length offset between a first transmission line and a second transmission line of a differential signal transmission. The compensation method includes calculating a transmission speed of a first signal in the first transmission line, measuring lengths of the first and second transmission lines, calculating a transmission time of the first signal in the first transmission line, and calculating a relationship between permittivity values of the first and second transmission lines. The compensation method further changes the permittivity values of the first and second transmission lines according to the relationship. | 09-23-2010 |
| 20100253383 | CIRCUIT TOPOLOGY FOR MULTIPLE LOADS - A circuit topology for multiple loads includes a driving terminal for transmitting a driving signal, a number of transmitting lines, and a number of loads operable to receive the driving signal from the driving terminal. The number of loads are connected to the driving terminal one by one via the number of transmitting lines. Two transmitting lines of the number of transmitting lines, which are nearest and farthest respectively from the driving terminal, are both greater than widths of the other transmitting lines. | 10-07-2010 |
| 20100258337 | FLEXIBLE PRINTED CIRCUIT BOARD - A flexible printed circuit board (FPCB) includes a signal layer, upper and lower ground layers, and two dielectric layers. The signal layer includes a differential pair comprising two transmission lines to transmit a pair of differential signals. The dielectric layers are located on and under the signal layer to sandwich the signal layer. The upper ground layer is attached to the dielectric layer on the signal layer, opposite to the signal layer. The lower ground layer is attached to the dielectric layer under the signal layer, opposite to the signal layer. Each ground layer includes a grounded sheet made of conductive material. Two voids are defined in each ground layer and located at opposite sides of the corresponding grounded sheet. Distances between the middle line of the grounded sheet of each ground layer and middle lines of the two transmission lines are equal. | 10-14-2010 |
| 20100258338 | FLEXIBLE PRINTED CIRCUIT BOARD - A flexible printed circuit board (FPCB) includes a signal layer, upper and lower ground layers, and two dielectric layers. The signal layer includes a differential pair comprising two transmission lines to transmit a pair of differential signal. The dielectric layers are respectively located on and under the signal layer to sandwich the signal layer. The upper ground layer is attached to the dielectric layer on the signal layer. The lower ground layer is attached to the dielectric layer under the signal layer. Each ground layer defines a void therein aligning with the differential pair. Dielectric coefficients of the two dielectric layers are different. | 10-14-2010 |
| 20100268498 | SYSTEM AND METHOD FOR TESTING SIGNALS OF ELECTRONIC COMPONENTS - A method for testing signals of electronic components. The method sends a positioning command to a control computer through a switch, so as to drive a probe holder of a mechanical arm to position probes of the oscilloscope on a position of the electronic component. The method further receives measured data collected by the oscilloscope, and compares the measured data with preset standard values to determine if the measured data is acceptable. | 10-21-2010 |
| 20100269080 | COMPUTER-AIDED DESIGN SYSTEM AND METHOD FOR SIMULATING PCB SPECIFICATIONS - A computer-aided design system and method are provided. The computer-aided design method reads PCB design data from a storage system, obtains a plurality of circuit signals from the PCB design data, and groups the differential signals into a plurality of differential signal pairs. The computer-aided design method further sets a signal design standard for each of the differential signal pairs according to the electrical characteristics of the differential signal pair, and compiles each of the signal design standards into an instruction set. In addition, the computer-aided design method generates a PCB design specification by integrating each of the instruction sets and the PCB design data, and stores the PCB design specification into the storage system. | 10-21-2010 |
| 20100271149 | HIGH-FREQUECY MODULE FOR WIRELESS COMMUNICATIONS - A high-frequency module includes an antenna, an impedance matching circuit, and a transmission wire. The transmission wire is connected between the antenna and the impedance matching circuit. The transmission wire includes a dielectric layer, a signal layer, and two ground layers. The signal layer and the ground layers are located on the dielectric layer. The ground layers are located at opposite sides of the signal layer respectively. A space is formed between a signal and each ground layer. | 10-28-2010 |
| 20100276192 | METHOD FOR REMOVING A STUB OF A VIA HOLE AND A PRINTED CIRCUIT BOARD DESIGNED BASED ON THE METHOD - A method for removing a stub of a via hole includes copperizing a wall of a via hole in a top layer of a printed circuit board (PCB) if signal lines are located on the top layer of the PCB, and a wall of the via hole in a bottom layer of the PCB is not copperized. The method further includes connecting the top layer and the bottom layer of the PCB using a connection layer. | 11-04-2010 |
| 20100277198 | SYSTEM AND METHOD FOR TESTING A CHARACTERISTIC IMPEDANCE OF AN ELECTRONIC COMPONENT - A method for testing a characteristic impedance of an electronic component includes sending a positioning command to a control computer through a switch, so as to drive a probe holder of a mechanical arm to position probes of a time domain reflectometer (TDR) on a position of the electronic component. The method further receives measured data collected by the TDR, and compares the measured data with preset standard values to determine if the measured data is acceptable. | 11-04-2010 |
| 20100277882 | MOTHERBOARD AND MOTHERBOARD LAYOUT METHOD - A motherboard layout method includes positioning two electronic elements on a top layer of a motherboard, and positioning another two electronic elements on a bottom layer of the motherboard, connecting one end of a first electronic element on the top layer to the same end of a first electronic element on the bottom layer with a first via hole, and connecting the same end of a second electronic element on the top layer to the same end of a second electronic element on the bottom layer with a second via hole. The method further includes connecting the other ends of the two electronic elements on the top layer to a first part, and connecting the other ends of the two electronic elements on the bottom layer to a second part. | 11-04-2010 |
| 20100289601 | OVERDRIVE TOPOLOGY STRUCTURE FOR TRANSMISSION OF RGB SIGNAL - An overdrive topology structure for transmission of a RGB signal includes a signal sending terminal, a signal receiving terminal, and a transmission line to transmit the RGB signal from the signal sending terminal to the signal receiving terminal. The transmission line is divided into a number of section transmission lines. A node is formed between every two section transmission lines. An impedance of a first section transmission line approaching to the signal sending terminal is less than an impedance of a second section transmission line approaching to the first section transmission line to overdrive the RGB signal at a first node between the first and second section transmission lines. At least one node except the first node is grounded via a resistor. An equivalent resistance of the resistor is equal to a resistance of the first resistor. | 11-18-2010 |
| 20100295552 | SIGNAL TESTING SYSTEM AND METHOD OF A PRINTED CIRCUIT BOARD - A signal testing method of a printed circuit board (PCB) applies a robot arm and an oscilloscope to test the PCB. The method controls the robot arm to move to test points of electronic signals of the PCB. The method further controls the oscilloscope connected to the robot arm to measure the electronic signals. | 11-25-2010 |
| 20100307806 | PRINTED CIRCUIT BOARD - A printed circuit board includes a signal layer and a power layer. A differential pair with two transmission lines is set on the signal layer. A cross-trench portion is formed in the power layer. A first width of each transmission line which is not located above the cross-trench portion is less than a second width of the transmission line which is located above the cross-trench portion. A first distance between the two transmission lines which are not located above the cross-trench portion is greater than a second distance between the two transmission lines which are located above the cross-trench portion. | 12-09-2010 |
| 20100314817 | CLAMP APPARATUS - A clamping apparatus includes a motor, a first cone gear secured to a shaft of the motor, and two clamping bodies attached to opposite sides of the motor. Each of the clamping bodies includes a second cone gear meshing with the first, a threaded post fixed to the second cone gear, a carriage threadedly connected with the threaded post, and a clamp arm fixed to the carriage. The motor rotates the first cone gear, and in turn the second cone gears and the corresponding threaded posts. With the rotation of the threaded posts, the carriages move towards or away from each other, whereby the clamp arms cooperatively acquire an object between the clamp arms, or release the object therefrom. | 12-16-2010 |
| 20100319979 | PRINTED CIRCUIT BOARD AND METHOD FOR DRILLING HOLE THEREIN - A method for defining a stepped hole in a printed circuit board (PCB) by drilling layers of the PCB by different sized drill bits along a same axis. The stepped hole in the layers of the PCB are decreased in diameters sequentially. | 12-23-2010 |
| 20100321910 | PRINTED CIRCUIT BOARD - A printed circuit board includes a first signal layer, a first reference layer, a second reference layer, and a second signal layer. An integrated circuit mounted on the first signal layer includes a power supply terminal connected to a first power supply via. The second signal layer includes a filter and a power supply wire. The filter includes a power terminal connected to the first power supply via, and a ground terminal connected to the second reference layer. The first power supply via is connected to the first reference layer through the power supply wire and a second power supply via. A void defined in the second reference layer is at least partially vertically overlapping with the power supply wire, and enables the first reference layer to function as a reference plane for the power supply wire, to increase impedance of the power supply wire. | 12-23-2010 |
| 20100328181 | SIGNAL TRANSMISSION APPARATUS - A signal transmission apparatus includes two circuit layers. First and second ground sheets are arranged in the two circuit layers respectively. A third ground sheet is arranged between the two circuit layers. A differential pair includes a transmission line arranged between the first and third ground sheets and a transmission line arranged between the second and third ground sheets. The first to third ground sheets have same electric potential. Projections of the first and second ground sheets on the third ground sheet superpose a border of the third ground sheet. The third ground sheet is formed by extending the border along a signal transmission direction. A vertical distance between the first and second transmission lines is twice as each of a vertical distance from the first ground sheet to the first transmission line and a vertical distance from the second ground sheet to the second transmission line | 12-30-2010 |
| 20100332169 | SYSTEM AND METHOD FOR TESTING A CHARACTERISTIC IMPEDANCE OF A SIGNAL PATH ROUTING OF A PRINTED CIRCUIT BOARD - A method for testing a characteristic impedance of a signal path routing of a printed circuit board (PCB) controls the test device to test a characteristic impedance of the signal path routing of the PCB to get test data of the signal path routing of the PCB. The method further analyzes the test data of the signal path routing of the PCB get analysis results, generate a test report for storing the test data of each signal path routing of the PCB and the analysis results if all signal path routings of the PCB have been tested. | 12-30-2010 |
| 20110015897 | SYSTEM AND METHOD FOR TESTING DERATING PERFORMANCE OF A COMPONENT OF AN ELECTRONIC DEVICE - A system and method for testing derating performance of a component obtains a component list, a pin list, and a standard derating list of the electronic device from a storage. The system and method further receives parameters of each component, the parameters of each component comprising voltages of two pins of the component and a working temperature of the component, calculates a working voltage and a derating ratio of the component according to the parameters. The system and method also analyzes the working voltage and the derating ratio of the component to get analysis result, generates a test report comprising the derating ratio, the working temperature, the analysis results of each component in the component list, and storing the test report in the storage. | 01-20-2011 |
| 20110019371 | FLEXIBLE PRINTED CIRCUIT BOARD - A flexible printed circuit board includes a differential pair arranged in a signal layer and two sheets defined in a ground layer. The two sheets are apart from each other by a void defined in the ground layer opposite to the differential pair. The differential pair includes a number of section pairs, each of which includes two sections arranged in two transmission lines of the differential pair respectively. The differential pair is equivalent to a low pass filter which includes several capacitors and several inductors. Each of the plurality of section pairs can achieve a desired characteristic impedance by adjusting a distance between each section and a corresponding nearest sheet, and a distance between the two sections of each of the plurality of section pairs. | 01-27-2011 |
| 20110023650 | CONNECTING ASSEMBLY AND CLAMP REPLACING APPARATUS USING SAME - A clamp replacing apparatus includes a robot arm, a clamp and a connecting assembly configured for detachably connecting the clamp to the robot arm. The connecting assembly includes a first rotator and a second rotator. The first rotator is fixed to the robot arm and comprises a number of first locking portions each defining a receiving groove. The second rotator is fixed to the clamp and comprises a number of second locking portions corresponding to the first locking portions and each defining a bolt portion. The bolt portion can be received in the corresponding receiving groove or escaped from the receiving groove. | 02-03-2011 |
| 20110025355 | APPARATUS FOR ADJUSTING DIFFERENTIAL PROBE - An apparatus for adjusting a differential probe includes a regulator arranged therein capable of adjusting a distance between two tips of the probe. The probe is supported on the apparatus. The apparatus includes a rotatable shaft and a rotatable disk. The rotatable shaft engages with the regulator of the probe. The rotatable disk is mounted surrounding the rotatable shaft and rotatable together with the rotatable shaft. An angular ruler or a radian ruler is described on an outer surface of the rotatable disk to indicate a rotation angle or a rotation radian of the rotatable shaft, therefore the distance between the two tips of the probe are accurately adjusted. | 02-03-2011 |
| 20110025434 | SIGNAL TRANSMISSION APPARATUS - A signal transmission apparatus includes two circuit layers. First and second ground sheets each has a rectangular area are arranged in the two circuit layers respectively. A third ground sheet is arranged between the two circuit layers. A differential pair includes a transmission line arranged between the first and third ground sheets and a transmission line arranged between the second and third ground sheets. The first to third ground sheets have same electric potential. Projections of the two rectangular areas on a surface where the third ground sheet in only have one common border with the third ground sheet. The third ground sheet is formed by extending the common border along a signal transmission direction. The differential pair includes a number of section pairs each composed of two sections arranged in the two transmission lines symmetrically. Every two adjacent section pairs are equivalent to a capacitor and an inductor. | 02-03-2011 |
| 20110030997 | FLEXIBLE PRINTED CIRCUIT BOARD - A flexible printed circuit board (FPCB) includes a differential pair arranged in a signal layer and a ground sheet arranged in a ground layer. The differential pair includes a number of section pairs, each of which includes two sections arranged in two transmission lines of the differential pair respectively. The ground sheet is opposite to a space between the two transmission lines of the differential pair. The differential pair is equivalent to a filter which includes several capacitors and several inductors. Each of the plurality of section pairs can achieve a desired characteristic impedance by adjusting a first distance between each section and the ground sheet, and a second distance between the two sections of each of the plurality of section pairs. | 02-10-2011 |
| 20110032055 | PRINTED CIRCUIT BOARD AND SIGNAL TRANSMISSION APPARATUS THEREOF - A signal transmission apparatus used in a printed circuit board (PCB). The apparatus includes a differential pair composed of two transmission lines arranged side by side in the PCB. The differential pair includes a filter section arranged therein to filter noise of transmission signals of the differential pair. The filter includes a number of section pairs connected in series. Each section pair includes two sections arranged in the two transmission lines symmetrically. Every two adjacent sections are different in line width. A distance between the two transmission lines, and the line width of each of the sections are predetermined according to desired frequency bandwidth, and desired frequency response of the differential pair. | 02-10-2011 |
| 20110035178 | SYSTEM AND METHOD FOR GENERATING A TEST FILE OF A PRINTED CIRCUIT BOARD - A system and method generates a test file of a print circuit board (PCB). The system and method loads trace information of the PCB into a storage system of a test computer, searches the storage system for the trace information matching keywords received and selects traces to test from the searched results. The system and method further acquires length and test points of each selected trace, and sets test parameters of each test item. In addition, the system and method generates a test file of the PCB according to the test parameters, the length, and the test points of each selected trace. | 02-10-2011 |
| 20110035713 | CIRCUIT BOARD DESIGN SYSTEM AND METHOD - A method and system for designing a circuit board designs wiring of the circuit board, and determines electronic rules and physical rules of the wiring design. The method and system creates a board file by designating a file name, outputs the electronic rules into the board file, and outputs the physical rules into the board file according to a preset output format. The method and system further generates a circuit diagram according to preset initial parameters, and applies the electronic rules and the physical rules to the circuit diagram according to the board file. | 02-10-2011 |
| 20110038427 | DIFFERENTIAL SIGNAL TRANSMISSION DEVICE - A differential signal transmission device transmits N differential signal pairs from a differential signal generator to a number of receiving terminals. The N differential signal pairs include N positive signals and N negative signals. The N positive signals are clustered at a first positive clustering point. The first positive clustering point is connected to a second positive clustering point via a first matching resistor. The second positive clustering point is grounded via a first grounding resistor, and outputs a number of positive signals to the number of receiving terminals respectively. The N negative signals are clustered at a first negative clustering point. The first negative clustering point is connected to a second negative clustering point via a second matching resistor. The second negative signal clustering point is grounded via a second grounding resistor, and outputs a number of negative signals to the number of receiving terminals respectively. | 02-17-2011 |
| 20110043302 | RADIO FREQUENCY FILTER AND FILTERING UNIT THEREOF - Parameters of a radio frequency filter can be changed by changing structure of each component of the filter. Material of each component, diameters of each of magnetic cylinders, density of each of conductive coils, thickness of a dielectric layer, and thickness of an insulation tube can be changed. When any component needs to be replaced, each cover is rotated, with connection partitions moving to two slots of an insulation portion, to detach the filter. | 02-24-2011 |
| 20110047524 | SYSTEM AND METHOD FOR INSPECTING LAYOUT OF A PRINTED CIRCUIT BOARD - A system and method for inspecting layout of a printed circuit board (PCB) provides a graphical user interface (GUI). The GUI displays a layout of the PCB. High side pins of a pulse width modulation (PWM) controller and a component connected to a high side pin are found. If the component is a metallic oxide semiconductor field effect transistor (MOSFET), the system calculate absolute a linear distance and a trace distance between a source pin of the MOSFET and a capacitor pin of a coupling capacitor connected to the source pin. If the linear distance, the trace distance and a capacitance of the coupling capacitor accord with a layout standard, the layout of the PCB is determined to be up to standard. | 02-24-2011 |
| 20110050261 | TEST PROBE - A test probe includes a filtering unit and a contact unit. The filtering unit includes an inductive component, a capacitive component, and an insulation component insulates the inductive component from the capacitive component. The contact unit contacts a test point to get a test signal. The filtering unit filters noise from the test signal. The test probe can be assembled and disassembled easily, and parameters of the filtering unit can be changed by changing structure of each component. | 03-03-2011 |
| 20110050361 | RADIO FREQUENCY FILTER - Parameters of a radio frequency filter can be changed by changing structure of each component of the filter. Material of each component, diameters of each of magnetic cylinders, density of each of conductive coils, thickness of a dielectric layer, and thickness of an insulation tube can be changed. When any component needs to be replaced, each cover is rotated, with connection partitions move to two slots of a resisting portion, to detach the filter. | 03-03-2011 |
| 20110050362 | RADIO FREQUENCY FILTER AND FILTERING UNIT THEREOF - Parameters of a radio frequency filter can be changed by changing structure of each component of the filter. Material of each component, diameters of each of magnetic cylinders, density of each of conductive coils, thickness of a dielectric layer, and thickness of an insulation tube can be changed. When any component needs to be replaced, each cover is rotated, with connection partitions move to two slots of an insulation portion, to detach the filter. | 03-03-2011 |
| 20110051793 | SYSTEM AND METHOD FOR EVALUATING PERFORMANCE OF A MIMO ANTENNA SYSTEM - A performance evaluation system for a multiple-input multiple-output (MIMO) antenna system receives simulation parameters from an input device, and simulates a MIMO antenna system accordingly. A method, also provided, further evaluates performance of the simulated MIMO antenna system when a series of radio frequency (RF) signals are transmitted through the MIMO antenna system, and displays a performance analysis result of the MIMO antenna system on a display device for evaluation of the performance of the simulated MIMO antenna system. | 03-03-2011 |
| 20110055796 | SYSTEM AND METHOD FOR REMOVING T-POINT ELEMENTS WITH UNUSED STUBS FROM A PCB LAYOUT DESIGN - A system and method for removing T-point elements with unused stubs from a printed circuit board (PCB) layout design obtains each signal line including one or more T-point elements in the PCB layout design, divides the obtained signal line into a plurality of lines according to the one or more T-point elements with unused stubs, and obtains properties of each of the plurality of lines. The system and method further deletes the original layout of the signal line and reconnects the plurality of lines according to the properties of each of the plurality of lines to generate a reconnected signal line, and outputs the reconnected signal line on a display device. | 03-03-2011 |
| 20110093831 | SYSTEM AND METHOD FOR ANALYZING TEMPERATURE RISE OF A PRINTED CIRCUIT BOARD - A system and method that can analyze a temperature rise of a printed circuit board (PCB). The system and method receives attribute parameters of the PCB from an input device, and generates a temperature rise formula according to the received attribute parameters. Additionally, the system and method calculates a temperature rise of a local area surrounding each component on the PCB according to the temperature rise formula. | 04-21-2011 |
| 20110094334 | REVERSING TRANSMISSION - The REVERSING TRANSMISSION includes a shaft, a retainer, a spacing collar, a plurality of reversing members, two gears and two covers. The holder is sleeved on the shaft with spaced sliding notches formed thereon. The spacing collar is mounted on an outer surface of the retainer. The reversing members each includes two spaced swing plates with two reversed spiral teeth dented on two diagonal half surfaces of the two spaced swing plate. The reversing members slide into the sliding notches of the holder with two swing plates distributed at different side of the spacing collar. Each of the gears has a group of spiral teeth formed on the inner side for engaging with the group of spiral teeth of the reversing members, and cogs formed on the outer circumference surface. The covers are mounted on two opposite ends of the holder to keep the reversing member in position. | 04-28-2011 |
| 20110094782 | PRINTED CIRCUIT BOARD - A printed circuit board includes a signal plane and a reference plane. The signal plane includes a pad, a passive element mounted on the pad, and a signal transmission line electrically connected to the passive element via the pad. The reference plane provides a return path for a signal transmitted through the passive element and the signal transmission line. A void is defined in the reference plane corresponding to the passive element, to increase a length of the return path. A length of a first axis, perpendicular to the signal transmission line, of the void satisfies a following equation: | 04-28-2011 |
| 20110094783 | PRINTED CIRCUIT BOARD - A printed circuit board (PCB) includes a signal plane and a reference plane. The signal plane includes a pad, a passive element mounted on the pad, and a signal transmission line electrically connected to the passive element via the pad. The reference plane provides a return path for a signal transmitted through the passive element and the transmission line. A void is defined in the reference plane corresponding to the passive element, to increase a length of the return path. | 04-28-2011 |
| 20110094786 | PRINTED CIRCUIT BOARD - A printed circuit board includes a number of signal layers, a number of ground layers, a first transmission line, a second transmission line, a first via, and a second via. The first transmission is located on one of the number of signal layers. The second transmission line is located on another of the number of signal layers. The first and second vias pass through the printed circuit board. The first via is electrically coupled to the first and second transmission lines, and is isolated from the number of ground layers. The second via is electrically coupled to one or more of the number of ground layers, and is isolated from the other of the number of ground layers to increase an inductance, thus compensating capacitive nature of an open stub and improving signal integrity. | 04-28-2011 |
| 20110098955 | SYSTEM AND METHOD FOR CALIBRATING OSCILLOGRAPH CHANNELS - A system and method for calibrating oscillograph channels assigns the same value to a drawing parameter of each channel. Each channel receives a signal sent by a signal generator. The oscillograph calculates a voltage difference between a standard signal voltage of a standard channel defined by a user and a signal voltage of each of the other channels. A sequence relationship between each of the other channels and the standard channel is determined. The oscillograph adjusts a deskew value of each of the other channels until each voltage difference is in an allowable range according to the sequence relationship. | 04-28-2011 |
| 20110102103 | RADIO FREQUENCY FILTER - Parameters of a radio frequency filter can be changed by changing structure of each component of the filter. Material of each component, diameters of each of magnetic cylinders, density of each of conductive coils, and thickness of each of dielectric layers can be changed. When any component needs to be replaced, the filter can be detached as needed. | 05-05-2011 |
| 20110106481 | SYSTEM AND METHOD FOR CHECKING GROUND VIAS OF A CONTROLLER CHIP OF A PRINTED CIRCUIT BOARD - A system and method for checking a ground via of control chips of a printed circuit board (PCB) provides a graphical user interface (GUI) displaying a layout of the PCB. The control chip has a plurality of ground pins. The computer searches for signal path routing of each ground pin and ground vias along each signal path routing of each ground pin. If there are any ground vias having the same absolute coordinates, the computer determines that the ground vias are shared by more than one ground pin. | 05-05-2011 |
| 20110114379 | PRINTED CIRCUIT BOARD - A printed circuit board can support different connectors by selectively setting connection components on the printed circuit board without changing wiring of transmission lines or making new vias in the printed circuit board. | 05-19-2011 |
| 20110140332 | TESTING APPARATUS - A testing apparatus is for testing products on an assembly line and includes a worktable, a positioning device, and a testing member. The worktable includes a number of wheels pivotably attached to a bottom thereof, and a number of retractable feet attached to the bottom thereof. The positioning device is attached to the worktable and includes a number of clamping members to position a product to be test. The testing member is attached to the worktable and operated by a control box to move a robot arm with a testing head to test the product. | 06-16-2011 |
| 20110161026 | SYSTEM AND METHOD FOR MEASURING PIN VOLTAGES OF ELECTRONIC COMPONENTS - A system and method uses a measurement control device and a measurement machine to measure pin voltages of electronic components installed in an electronic device. The measurement control device controls a mechanical arm of the measurement machine to move to the pins of the electronic components according to coordinates of the pins. A voltage probe installed on the end of the mechanical arm can measure voltages of the pins automatically. | 06-30-2011 |
