Patent application number | Description | Published |
20110233349 | SUPPORT FRAME - A support frame to support an electronic component of a computer system is provided. The support frame includes four support posts and two pairs of brackets mounted on the support posts. Each bracket includes a bottom surface and two side edges extending from opposite sides of the bottom surface along the same axis. A guide member is slidably mounted between one pair of brackets. The guide member includes a main body and two sliding portions positioned on opposite sides of the main body. A plurality of rolling members is movably mounted between the sliding portion and the corresponding side edges of the at least one pair of brackets. The electronic component is secured to the main body, and generating an amount of roll friction when the electronic component is inserted into or withdrawn from the brackets. | 09-29-2011 |
20120062200 | VOLTAGE REGULATION DEVICE AND SYSTEM EMPLOYING THE SAME - A voltage regulation device employed in a voltage regulation system is for a motherboard power supply. The voltage regulation device includes a first sampling module, a voltage regulation module, a second sampling module, and a main controller. The first sampling module samples current and voltage signals from a power source through the motherboard power supply. The voltage regulation module outputs adjustable drive voltages for the motherboard power supply controlled by the main controller. The second sampling module samples current and voltage signals of the drive voltages from the motherboard power supply. The main controller receives the current and voltage signals, and converts the current and voltage signals from the first sampling module and the second sampling module to corresponding input power and output power, respectively, and the input power and the output power are calculated to generate conversion efficiencies of each drive voltage. | 03-15-2012 |
20120108202 | SECURITY SYSTEM AND METHOD FOR AN ELECTRONIC DEVICE - A security system and method for an electronic device include comparing data in a Subscriber Identity Module (SIM) card with data in a virtual SIM card, if the virtual SIM card is not blank. The security system further include determining whether the electronic device has received a command of reporting loss of the SIM card from the network server, if the data in the SIM card is the same as the data in the virtual SIM card. The security method further includes running the electronic device normally if the electronic device has not received the command of reporting loss of the SIM card. If the command of reporting loss is received, a contact list and message of the electronic device are deleted and a calling function of the electronic device is disabled. | 05-03-2012 |
20120112715 | SNUBBER CIRCUIT FOR BUCK CONVERTER - A snubber circuit for decreasing a voltage spike of a buck converter includes a resistor unit, a capacitor unit, a detecting unit, and a control unit. The resistor unit provides multiple groups of resistance values. The capacitor unit provides multiple groups of capacitance values. The detecting unit detects voltage spikes of the buck converter corresponding to each group of resistance values and capacitance values. The control unit selects each group of resistance and capacitance to respectively connect to the buck converter and determines a group of resistance and capacitance corresponding to a lowest voltage spike by comparing the detected voltage spikes with each other. | 05-10-2012 |
20120133349 | MEASUREMENT CIRCUIT FOR BUCK CIRCUIT - A measurement circuit for overload protection is applied in a buck circuit. The buck circuit includes a pulse width modulation (PWM) controller and a voltage output terminal. The measurement circuit includes a resistance setting circuit to connect different resistances to the PWM controller of the buck circuit. A switch circuit turns the measurement circuit on or off. A current collection circuit receives a voltage from the voltage output terminal of the buck circuit and transforms the received voltage to a current, and amplifies the transformed current and outputs the amplified current to the resistance setting circuit. The resistance setting circuit chooses a resistance through comparison of the amplified current with a preset current. A display unit displays the chosen resistance. | 05-31-2012 |
20120146615 | OUTPUT VOLTAGE ADJUSTMENT CIRCUIT FOR BUCK CIRCUITS - An output voltage adjustment circuit for buck circuits includes a microcontroller, first to eighth keys, and a display unit. The first to eighth keys input voltage adjustment signals to the microcontroller. A first input pin of the microcontroller is connected to a voltage output terminal. A second resistor is connected between the first input pin of the microcontroller and ground. A first to a sixth input/output pin of the microcontroller are connected to the display unit. A first to an eighth output pin of the microcontroller are connected to a pulse width modulation (PWM) controller. The first to eighth keys are selectively activated to provide voltage adjustment signals to the microcontroller, sampling output voltages of the voltage output terminal, comparing with a predetermined voltage, controlling the PWM controller to fine tune the duty cycle to output a stable voltage from the voltage output terminal. The display unit displays the voltages on the voltage output terminal. | 06-14-2012 |
20120159227 | POWER DETECTION DEVICE FOR MOTHERBOARD - A motherboard detection device for a motherboard having a plurality of power input terminals. The power detection device includes a current sampling module, a voltage sampling module, a processor, and a display unit. The current sampling module is connected to the power input terminals for obtaining the current of each power input terminal. The voltage sampling module is connected to the power input terminals for obtaining the voltage of each power input terminal. The processor is connected to the current sampling module and the voltage sampling module for acquiring the current and the voltage of each power input terminal and calculating the input power of each power input terminal based on the current and the voltage of each power input terminal to obtain input power data. The display unit is connected to the processor for receiving the input power data from the processor and displaying the input power data. | 06-21-2012 |
20120161694 | MULTIMETER WITH CHARGING SYSTEM - A multimeter includes a main body, two probes extending from the main body, a battery unit arranged in the main body, and a charging system arranged in the main body and configured for charging the battery. The charging system includes a microcontroller with an external input voltage sampling circuit, a battery voltage sampling circuit and a voltage regulator circuit each electrically connected the microcontroller. The microcontroller compares sampled signals from the external input voltage sampling circuit and the battery voltage sampling circuit, and controls the voltage regulator circuit to regulate the external input voltage to be applicable to the battery based on the comparison. | 06-28-2012 |
20120161781 | MEASUREMENT CIRCUIT FOR CAPACITOR - A measurement circuit includes a switch unit with a number of keys selectively pressed to output different resistance regulating signals. A resistance setting circuit receives the resistance regulating signals and connects different resistances to a voltage circuit and a current circuit. The voltage circuit outputs different voltages. The current voltage receives a voltage from the voltage circuit and outputs a current to a capacitor. A detecting circuit measures a temperature of the capacitor and outputs the temperature to the resistance setting circuit. The resistance setting circuit compares the received temperature with a preset temperature. If the received temperature is equal to or greater than the preset temperature, the resistance setting circuit outputs short-circuit information of the capacitor. If the received temperature is less than the preset temperature, the resistance setting circuit outputs normal information of the capacitor. A display unit displays the information of the capacitor. | 06-28-2012 |
20120161798 | MEASUREMENT CIRCUIT FOR POWER SUPPLY - A measurement circuit includes a switch unit with a number of keys selectively pressed to output different resistance regulating signals. A resistance setting circuit receives the resistance regulating signals and connects different resistances to a control circuit. The control circuit obtains a voltage according to the chosen resistance by the resistance setting circuit and compares the voltage with a preset voltage. If the voltage is greater than the preset voltage, the control circuit outputs a high level signal to a control pin of a pulse width modulation (PWM) controller, to control a voltage unit to output a voltage. If the voltage is less than the preset voltage, the control circuit outputs a low level signal to the control pin of the PWM controller, to control the voltage unit to not output a voltage. A display unit displays the chosen resistance. | 06-28-2012 |
20120169312 | DRIVING VOLTAGE ADJUSTING CIRCUIT - A driving voltage adjusting circuit includes a digital rheostat, a control chip, a low dropout regulating circuit, and a driving circuit. The control chip is connected with the digital rheostat, and configured for adjusting the resistance of the digital rheostat. The low dropout regulating circuit is connected with the digital rheostat and outputs an output voltage according to the resistance of the digital rheostat. The driving circuit comprising a number of switch elements connected with each other and a driver configured for driving the switch elements, each of the switch elements comprising a first terminal, a second terminal, and a control terminal configured for controlling connection and disconnection of the first terminal and the second terminal; the first terminal and the second terminal connected with the control chip, the driver is connected with the low dropout regulating circuit and output an driving voltage to the control terminal. | 07-05-2012 |
20120173892 | COMPUTER MOTHERBOARD AND CPU VOLTAGE REGULATOR POWER SUPPLY LAYOUT METHOD - A computer motherboard includes a motherboard substrate defining a CPU loading area and a CPU voltage regulator power supply layout area. The power supply layout area is equally divided into a number of phase regions, and each of the phase regions has a number of spaced circuit layers. The circuit layers in the phase regions are symmetrical about a central axis of the CPU loading area, and a difference between each two simulating impedances between an impedance center of each of the phase regions and a loading center of the CPU loading area is within 1%. | 07-05-2012 |
20120176142 | TEST CIRCUIT FOR RESISTOR CAPACITOR CIRCUITS - An RC test circuit includes an RC circuit, a digital rheostat, a control chip, and an oscillograph. The RC circuit includes a plurality of positive terminals and a plurality of negative terminals. The digital rheostat includes a plurality of rheostats each including a sliding terminal and a fixed terminal. The sliding terminals are correspondingly connected to the positive terminals while the fixed terminals are correspondingly connected to the negative terminals. The control chip is connected to the digital rheostat, and configured for controlling the digital rheostat to change the resistance of each rheostat. The oscillograph is connected to the RC circuit for displaying a waveform of the RC circuit. | 07-12-2012 |
20120179930 | MOTHERBOARD HAVING TIME DELAY CIRCUIT FOR DELAYING PSON SIGNAL - A motherboard includes a motherboard power supply connector and a time delay circuit. The motherboard power supply connector connects a power supply unit. The motherboard power supply connector has a power supply on pin and a power good pin. The power good pin is configured for receiving a power good signal from the power supply unit. The time delay circuit has an input terminal and an output terminal. The input terminal is configured for receiving a power supply on signal. The output terminal is connected to the power supply on pin and is configured for sending the power supply on signal to the power supply on pin after a time delay determined by the time delay circuit. | 07-12-2012 |
20120242306 | DRIVING CIRCUIT - A driving circuit includes a switching circuit, an acquiring circuit, an amplifying circuit, and an adjusting circuit. The switching circuit includes a driving chip and a switching unit. The switching unit is connected between a power source and a load, the driving chip is configured for controlling the connection and disconnection of the switching unit. The acquiring circuit is connected between the switching unit and the load, and is configured for providing a feedback to the amplifying circuit. The amplifying circuit includes two amplifying input terminals connected to two terminals of the acquiring circuit and an amplifying output terminal outputting an amplified voltage. The adjusting circuit is connected to the amplifying output terminal and is configured for outputting different control voltages to the driving chip according to the amplified voltage. The driving chip outputs different driving voltages to the switching unit according to the control voltages. | 09-27-2012 |
20130241506 | POWER CONTROL CIRCUIT AND LOOP ANALYZING APPARATUS COMPRISING SAME - A power supply control circuit includes a main controller, a current detection unit electronically connected to the main controller, and a mode switch unit electronically connected to the main controller. The current detection unit cooperates with the main controller in detecting a value of an output current of a power supply circuit. The main controller determines whether the power supply circuit is operating in a discontinuous conduction mode or in a continuous conduction mode according to the value of the output current of the power supply circuit, and controls the mode switch unit to switch the power supply circuit to the continuous conduction mode when the power supply circuit operates in the discontinuous conduction mode. | 09-19-2013 |
20130249567 | CAPACITIVE LOAD TESTING DEVICE OF POWER SUPPLY - A device for testing capacitive loads of a power supply includes a controller, a power supply switching circuit, a capacitive load switching circuit, and a current sampling circuit. The power supply switching circuit selects one of output voltages of the power supply to be electronically connected to the capacitive load switching circuit and the current sampling circuit. The current sampling circuit samples an output current of one output of the power supply selected by the controller. The controller turns on and off switches of the capacitive load switching circuit for matching an output current of the power supply with a reference current until the output current equals to the reference current. The controller outputs a total magnitude of the capacitive loads. | 09-26-2013 |
20130271165 | OUTPUT IMPEDANCE TESTING DEVICE - A device that tests an output impedance of a voltage regulator module (VRM) includes a controller, a current regulating circuit, a voltage sampling circuit, and a current sampling circuit. The voltage sampling circuit samples an instantaneous alternating output voltage of the VRM, and outputs the instantaneous alternating output voltage to the controller. The current sampling circuit cooperates with the controller in sampling the instantaneous output current of the VRM. The controller controls the current regulating circuit to regulate the instantaneous output current of the VRM until the instantaneous alternating output voltage is about equal to a predetermined reference voltage, and calculates an output impedance of the VRM according to the instantaneous alternating output voltage and instantaneous output current when the instantaneous alternating output voltage is about equal to the predetermined reference voltage. | 10-17-2013 |
20130278060 | MINIMUM OUTPUT CURRENT ADAPTING CIRCUIT AND MOTHERBOARD USING SAME - A minimum output current adapting circuit draws currents from a plurality of power ports of a power supply unit (PSU). The current adapting circuit includes a plurality of current adapting units and a control unit. Each current adapting unit is electronically connected to one of the power ports. Each current adapting unit is configured to increase an output current of the power port, to facilitate the output current of the power port to be greater than a request minimum output current of the power port. The control unit is electronically connected to the PSU and a processor powered by the PSU, the control unit is configured to activate each current adapting unit when the PSU starts to work, and inactivate each current adapting unit after the processor is powered on and works in a normal state. | 10-24-2013 |
20130290788 | MINIMUM OUTPUT CURRENT TEST APPARATUS - An apparatus tests currents from a plurality of power ports of a power supply unit (PSU), to test minimum value of the currents. The apparatus includes a connector, a controller, a time sequence detection circuit, and a plurality of load circuits. The time sequence detection circuit detects a start time-sequence of the ports of the PSU. Each load circuit is electronically connected to a power port of the PSU. The controller activates and applies each load circuit to a power port of the PSU according the start time-sequence of the ports of the PSU, controls a current-draw of each load circuit until the PSU works in a normal state, and displays the established minimum output current when the PSU works in the normal state. | 10-31-2013 |
20130328405 | GROUND TEST CIRCUIT - A ground test circuit for a power supply unit includes a sampling circuit, a converting circuit, a processing circuit, and a switch circuit. The sampling circuit detects a voltage difference between a first ground terminal and a second ground terminal. The converting circuit converts the voltage difference to a digital value. The processing circuit compares the digital value to a predetermined value. As long as the digital value is smaller than the predetermined value, the switch circuit allows an external power source to be connected to the power supply unit. Thereby, the ground test circuit controls the connection between the external power source and the power supply unit according to the result of comparison of values done by the processing circuit. | 12-12-2013 |
20130342237 | POWER SUPPLY TEST DEVICE - A power supply test device includes a function generator, a loading circuit, a current detection circuit, and a controller. The function generator outputs a square-wave signal to the loading circuit. The loading circuit is electronically connected to a power supply, the loading circuit regulates an output current of the power supply according to the square-wave signal. The current detection circuit cooperates with the controller in detecting a slope of the output current. The controller compares the detected slope with a preset value, and regulates the square-wave signal according to the comparison to regulate the slope of the output current. | 12-26-2013 |
20140001852 | POWER SEQUENCE CIRCUIT | 01-02-2014 |
20140002938 | TEST DEVICE FOR BUCK CIRCUIT | 01-02-2014 |
20140009178 | IMPEDANCE MEASURING DEVICE - An impedance measuring device for an electronic component includes a constant voltage source, a load supplying circuit, a voltage detection circuit, and a controller. The constant voltage source outputs an input voltage. The load supplying circuit supplies a load resistor that is electronically connected in series with the electronic component between the constant voltage source and ground. The voltage detection circuit detects a voltage across the load resistor. The controller receives the voltage across the load resistor from the voltage detection circuit, and calculates an equivalent impedance of the electronic component according to the input voltage, the voltage across the load resistor, and the resistance of the load resistor. | 01-09-2014 |
20140028331 | INDUCTANCE MEASUREMENT CIRCUIT - An inductance measurement circuit includes a control circuit, a constant current supply circuit, a voltage detecting circuit, and a display circuit. The control circuit controls the constant current supply circuit to supply a first current for a first inductor. The control circuit controls the voltage detecting circuit to detect a voltage on the first inductor. The control circuit obtains an internal resistance of the first inductor by dividing the first voltage by the first constant current. The display circuit displays the internal resistance of the first inductor. | 01-30-2014 |
20140089882 | COMPUTING DEVICE AND METHOD FOR MODULARIZING POWER SUPPLIES PLACED ON PCB - In a method for modularizing power supplies placed on a printed circuit board (PCB) using a computing device, a circuit design drawing of a power supply is obtained from a database. The method acquires circuit design data of the power supply from the circuit design drawing of the power supply, and modularizes the circuit design data to generate a virtual power supply. The method generates a first layout of the virtual power supply on the PCB in a landscape orientation according to a horizontal dimension of the PCB, and generates a second layout of the virtual power supply on the PCB in a portrait orientation according to a vertical dimension of the PCB. A component information system (CIS) management library is created in the database, and the first layout and the second layout of the virtual power supply are stored in the CIS management library. | 03-27-2014 |
20140125273 | CONTROL SYSTEM AND METHOD FOR BATTERY - A control system for a battery includes a battery backup unit (BBU), a switch circuit coupled between the BBU and the adapter, and a complex programmable logic device (CPLD) coupled to the BBU and the switch circuit. The CPLD controls the switch circuit to turn on when an actual rate between a rest voltage and a rated voltage of the battery is less than a predetermined rate, to charge the battery through the switch circuit. If the actual rate is greater than or equal to the predetermined rate, the CPLD maintains the adapter to charge or discharge the battery according to state of the battery. | 05-08-2014 |
20140139187 | POWER SUPPLY CIRCUIT - A power supply circuit includes a load, a chargeable battery, a discharging circuit, a charging circuit, an adapter, and a control circuit. When the adapter operates normally, the control circuit measures a voltage of the chargeable battery, and controls the charging circuit to charge the chargeable battery when the voltage of the chargeable battery is less than a preset value. The control circuit measures a charging current and a temperature of the chargeable battery, and regulates the charging current through the charging circuit according to the measured charging current and temperature. The adapter provides a voltage to the load through the discharging circuit. When the adapter is powered off, the control circuit does not sense a voltage a voltage from the adapter. The control circuit controls the chargeable battery to power the load through the discharging circuit. | 05-22-2014 |
20140281596 | FREQUENCY ADJUSTMENT SYSTEM AND METHOD - A frequency adjustment system includes a phase-locked loop (PLL) circuit, an adjusting circuit, and a voltage regulator module (VRM). The PLL circuit outputs a trigger signal when a communication frequency of a chip changes. The adjusting circuit adjusts a clock frequency of the adjusting circuit to receive communication data. The adjusting circuit further outputs a control signal to the VRM. The VRM outputs a voltage according to the control signal. | 09-18-2014 |
20140319930 | POWER SUPPLY CIRCUIT - A power supply circuit which ceases the supply of power to an external device if the ground connection of the external device is broken includes a connector module, a test module, and a switch module. The connector module connects to the external device. The test module tests the connection between the connector module and the external device and can output a first or a second signal. The switch module is connected between the test module and the connector module, when the switch module receives the first signal from the test module, the switch module permits a connection between the connector module and power supply. When the switch module receives the second signal from the test module, the switch module disconnects the connector module from the power supply. | 10-30-2014 |
20140375143 | POWER CONTROL DEVICE - A power control device includes a connector, a detecting module, a control module, a first output module, a second output module, a first switch module, and a second switch module. The detecting module measures a current and outputs different signals according to a comparison result between the current and a preset value. The first output module and the second output module are selectively used to supply power for the connector according to a value of the current. | 12-25-2014 |