Class / Patent application number | Description | Number of patent applications / Date published |
333012000 | TRANSMISSION LINE INDUCTIVE OR RADIATION INTERFERENCE REDUCTION SYSTEMS | 74 |
20080266018 | Electromagnetic bandgap structure and printed circuit board - An electromagnetic bandgap structure and a printed circuit board that can solve a mixed signal problem between an analog circuit and a digital circuit are disclosed. In accordance with an embodiment of the present invention, the electromagnetic bandgap structure can include a metal layer; and a plurality of mushroom type structures including a metal plate and a via. Here, the plurality of mushroom type structures can be formed on the metal layer in a stacked structure. With the present invention, the small sized electromagnetic bandgap structure can have a lower bandgap frequency. | 10-30-2008 |
20080266019 | DIFFERENTIAL TRANSMISSION LINE - A differential transmission line that has three or more signal lines and with which there is little unwanted radiation noise is provided. The differential transmission line | 10-30-2008 |
20080278255 | RF-COUPLED DIGITAL ISOLATOR - An RF-coupled digital isolator includes a first leadframe portion and a second leadframe portion, electrically isolated from one another. The first leadframe portion includes a first main body and a first finger. The second leadframe portion includes a second main body and a second finger. The first main body is connected to a first ground, and the second main body is connected to a second ground that is electrically isolated from the first ground. The first finger and the second finger are electrically isolated from one another, e.g., by a plastic molding compound that forms a package for the digital isolator. The first finger acts as a primary of a transformer, and the second finger acts as a secondary of a transformer, when an RF signal drives to the first finger. The first finger and the second finger can be substantially parallel or anti-parallel to one another. | 11-13-2008 |
20080278256 | RF - COUPLED DIGITAL ISOLATOR - An RF-coupled digital isolator includes a first leadframe portion and a second leadframe portion, electrically isolated from one another. The first leadframe portion includes a first main body and a first finger. The second leadframe portion includes a second main body and a second finger. The first main body is connected to a first ground, and the second main body is connected to a second ground that is electrically isolated from the first ground. The first finger and the second finger are electrically isolated from one another, e.g., by a plastic molding compound that forms a package for the digital isolator. The first finger acts as a primary of a transformer, and the second finger acts as a secondary of a transformer, when an RF signal drives to the first finger. The first finger and the second finger can be substantially parallel or anti-parallel to one another. | 11-13-2008 |
20080303604 | TRANSMISSION CABLE CAPABLE OF CONTROLLING AND REGULATING ITS CHARACTERISTIC IMPEDANCE AND ELECTROMAGNETIC INTERFERENCE SIMULTANEOUSLY - Disclosed is a transmission cable capable of controlling and regulating its characteristic impedance and electromagnetic interference simultaneously. The transmission cable comprises at least two conduction wires, which are twisted with each other along a longitudinal direction of the transmission cable. In the design of the transmission cable, the electromagnetic interference is controlled through the twisting of the conduction wires (for example, twisted pair cable). In addition, the two conduction wires tightly contact each other without any gap therebetween, thus achieving the control of its characteristic impedance. | 12-11-2008 |
20080309425 | Liquid ejecting apparatus and signal transmission channel - A liquid ejecting apparatus is provided with: a first cable that includes a ground line group in which ground lines are lined up continuously in a plurality of transmission lines lined up in a predetermined direction; and a second cable that is arranged so as to be in opposition to the first cable and in which a plurality of transmission lines are lined up in the predetermined direction, a transmission line, in which voltage varies, being arranged so as to be in opposition to a region that covers the ground line group. | 12-18-2008 |
20090021323 | FLAT UNIFORM TRANSMISSION LINE HAVING ELECTROMAGNETIC SHIELDING FUNCTION - Disclosed herein is a flat uniform transmission line having an electromagnetic shielding function. The flat uniform transmission line includes a strip transmission line, an insulating layer, and electromagnetic shielding layers. The strip transmission line is formed on a dielectric layer made of functional polymer material, and includes a plurality of strip lines. The plurality of strip lines are configured to be a ground line, or to transmit signals. The insulating layer is formed on the strip transmission line. The electromagnetic shielding layers are respectively formed on the insulating layer and beneath the strip transmission line. | 01-22-2009 |
20090027136 | ACTIVE ELECTROMAGNETIC INTERFERENCE FILTER CIRCUIT FOR SUPPRESSING A LINE CONDUCTED INTERFERENCE SIGNAL - The invention relates to an Electromagnetic Interference (EMI) filter circuit (Fa) for suppressing a Line Conducted Interference (LCI) signal. The EMI filter circuit (Fa) comprises a filter inductance (Lo) to carry a supply current (Isup) between a supply voltage (Vsup) and a load (L). The EMI filter circuit (Fa) further comprises an active circuit (Ca), arranged in parallel with the filter inductance (Lo). The active circuit (Ca) comprises a sensing circuit (Mm) to sense the LCI signal and further comprises a suppressing circuit (Ms) to suppress the LCI signal. In an embodiment of the active EMI filter circuit (Fa), the active circuit (Ca) comprises a negative inductance generating circuit to create a negative inductance value. Selecting the negative inductance generating circuit to create an inductance value (Lca) larger than the inductance value of the filter inductance (Lo) creates a resulting inductance (Lr) which is higher compared to the inductance value of the filter inductance (Lo). In one embodiment, the negative inductance generating circuit comprises a negative impedance converter. | 01-29-2009 |
20090039975 | Electrical Multiple-Wire System for Push-Pull Signal Transmission With an Attenuating or Filtering Element and Data Transmission Bus - The electric multiple conductor system ( | 02-12-2009 |
20090128248 | FILTER AND MANUFACTURING METHOD THEREOF - A filter includes a first magnetic layer, a second magnetic layer, an insulating layer, a plurality of coils, a first non-magnetic layer and a second non-magnetic layer. The insulating layer is disposed between the first magnetic layer and the second magnetic layer, and the coils are disposed in the insulating layer. The first non-magnetic layer is disposed on one side of the first magnetic layer, which is far away from the insulating layer, and the second non-magnetic layer is disposed on one side of the second magnetic layer, which is far away from the insulating layer. | 05-21-2009 |
20090146755 | PLANAR EMI FILTER - An EMI filter for use between a power source and an electronic product is formed of at least one planar element including a pair of opposed coreless spiral planar windings, and a planar capacitor. This enables the integration of common mode and differential mode filters into integrated planar structures. Furthermore the planar EMI filter may be combined with an active filter element to provide a hybrid EMI filter comprising both passive and active elements with superior performance. | 06-11-2009 |
20090179710 | Electromagnetic interference eliminating apparatus - An electromagnetic interference eliminating apparatus includes a multi-stage filter that is composed of inductors, capacitors and resistors, and an active filter. The multi-stage filter receives an input signal and provides an eliminating band to eliminate the noise in the input signal. The active filter is connected with the multi-stage filter for buffering the input signal that has been eliminated and exactly outputting an output signal. | 07-16-2009 |
20090184778 | SUBSTRATE HAVING A STRUCTURE FOR SUPPRESSING NOISE GENERATED IN A POWER PLANE AND/OR A GROUND PLANE, AND AN ELECTRONIC SYSTEM INCLUDING THE SAME - A substrate includes a power plane and a ground plane that are placed apart from and are substantially parallel to each other, and at least one signal line that is placed between the power plane and the ground plane. The ground plane includes a first conductive layer having a first conductivity. The power plane includes a second conductive layer having the first conductivity, and the power plane or the ground plane includes a third conductive layer having a second conductivity lower than the first conductivity. The third conductive layer faces the at least one signal line across a dielectric substance. | 07-23-2009 |
20090237174 | INTEGRATED CIRCUIT DEVICE, ELECTRO-OPTICAL DEVICE, AND ELECTRONIC INSTRUMENT - An integrated circuit device includes a high-speed serial interface circuit that includes a receiver circuit that receives differential signals through a serial bus, first and second guard terminals that prevent radiation, first and second terminals that are disposed between the first and second guard terminals and receive the differential signals, a first power supply terminal to which a high-voltage-side power supply voltage for the receiver circuit is supplied, and a second power supply terminal to which a low-voltage-side power supply voltage is supplied. A first switch element is provided between a line from the first guard terminal and a line from the second power supply terminal, and a second switch element is provided between a line from the second guard terminal and a line from the second power supply terminal. The first and second switch elements are turned ON in a high-speed serial interface mode. | 09-24-2009 |
20090289734 | APPARATUS FOR SILENCING ELECTROMAGNETIC NOISE - Proposed is an apparatus for silencing electromagnetic noise, characterized by a plurality of centrally symmetrical ring-shaped through-via-hole crystalline units provided between a high voltage plane and a low voltage plane at a regular interval, thereby forming an omnidirectional noise suppression frequency band for reducing noise interference and electromagnetic radiation. In a first embodiment of the ring-shaped through-via-hole crystalline units, the through via holes are perpendicularly coupled between a metal plane and the low voltage plane. In a second embodiment of the ring-shaped through-via-hole crystalline units, the through via holes are perpendicularly coupled between two metal planes. Positioned at a regular interval, the through via holes enable provision of omnidirectional noise suppression frequency band, simplified design of a power plane, and reduction of production costs. | 11-26-2009 |
20090302966 | METHOD AND SYSTEM FOR OPTIMAL FREQUENCY PLANNING FOR AN INTEGRATED COMMUNICATION SYSTEM WITH MULTIPLE RECEIVERS - Methods and systems for optimal frequency planning for an integrated communication system with multiple receivers may include adjusting a center frequency of a low IF signal to reduce interference by a second order interference signal. The center frequency may be adjusted to avoid high power portions of the second order interference signal. The interference level corresponding to a center frequency may be determined by, for example, a SNR of the low IF signal, or by determining a BER for the low IF signal. The center frequency of the low IF signal may be dynamically adjusted to keep second order interference level at an acceptable level. Adjusting the center frequency of the low IF signal may also comprise keeping the low IF signal from being blocked by a DC component of the second order interference signal. | 12-10-2009 |
20090322441 | CHIP ON FILM TRACE ROUTING METHOD FOR ELECTRICAL MAGNETIC INTERFERENCE REDUCTION - A chip on film (COF) trace routing method for EMI reduction includes: providing a flexible circuit board; mounting a chip that has a first signal pad, a second signal pad and a ground pad on the flexible circuit board; and forming a first signal trace, a second signal trace, a first ground trace and a second ground trace on the flexible circuit board. The first signal trace and the second signal trace are electrically connected to the first signal pad and the second signal pad respectively. The first ground trace and the second ground trace are both electrically connected to the ground pad. The first signal trace and the second signal trace are disposed between the first ground trace and the second ground trace. The first ground trace and the second ground trace are immediately adjacent to the first signal trace and the second signal trace respectively. | 12-31-2009 |
20100060373 | HIGH FREQUENCY PACKAGE AND MANUFACTURING METHOD THEREOF - A high frequency package in which the resonance frequency of a metal seal ring is high, a reflection loss and a insertion loss of an input terminal and an output terminal are reduced in working frequency, and which has an excellent RF (radio frequency) characteristic in such as a millimeter wave, and a manufacturing method for the same are provided. The high frequency package has a minimum of an conductor base plate, a ceramic frame, the metal seal ring arranged on the ceramic frame, a solder metal layer arranged on the metal seal ring, a resonance frequency adjustment conductor formed of a conductor having an opening arranged on the solder metal layer, and a ceramic cap arranged on the resonance frequency adjustment conductor. The resonance frequency adjustment conductor is arranged so that an opening may correspond to a high portion of a loop of bonding wire. | 03-11-2010 |
20100085128 | ELECTRO-MAGNETIC BANDGAP STRUCTURE - An electro-magnetic bandgap structure is disclosed. The electro-magnetic bandgap structure in accordance with an embodiment of the present invention includes a plurality of conductive plates bridge-connected with one another on a same plane, whereas the each of the conductive plates includes an internal patch; a first ring patch be electrically separated from the internal patch and surrounding the internal patch; and a second ring patch surrounding the first ring patch and electrically connected with the first ring patch through a portion. | 04-08-2010 |
20100123527 | NETWORK TRANSFORMER TO REDUCE ELECTROMAGNETIC INTERFERENCE - A network transformer to reduce electromagnetic interference (EMI) is connected to two network equipment to transmit data. It has a transformation unit to transform input power and input information of one network equipment to output power and output information and a plurality of high frequency signal attenuation elements to receive the output power and output information and reduce high frequency noises thereof. The attenuated output information and output power are sent to the load of the other network equipment. The high frequency signal attenuation elements and the load are bridged by high frequency signal channel elements which receive high frequency signals of the output information and output power, and integrate and ground the high frequency signals. Therefore, the high frequency signals are eliminated and EMI is reduced. | 05-20-2010 |
20100127790 | ELECTROMAGNETIC BANDGAP STRUCTURE AND PRINTED CIRCUIT BOARD - An electromagnetic bandgap structure is disclosed. In accordance with an embodiment of the present invention, the electromagnetic bandgap structure that blocks a noise of a certain frequency band can include 4 or more conductive plates, a first stitching via, which electrically connects any two of the conductive plates with each other by having a part of the first stitching via pass through a planar surface that is different from a planar surface of the conductive plates, a second stitching via, which electrically connects another two of the conductive plates with each other by having a part of the second stitching via pass through a planar surface that is different from a planar surface of the conductive plates, and a stitching via chain, which electrically connects the first stitching via and the second stitching via with each other. | 05-27-2010 |
20100134200 | ELECTROMAGNETIC BANDGAP STRUCTURE AND PRINTED CIRCUIT BOARD - An electromagnetic bandgap structure is disclosed. In accordance with an embodiment of the present invention, the electromagnetic bandgap structure can include a dielectric layer, a plurality of conductive plates, placed on a planar surface which is different from that of the dielectric layer, vias, of which each is connected to each of the conductive plates, respectively, and penetrates through the dielectric layer from one end part that is connected to the conductive plates, and a conductive trace, which connects the other end parts of the vias with each other such that all of the conductive plates are electrically connected. | 06-03-2010 |
20100219902 | ELECTROMAGNETIC INTERFERENCE MITIGATION SYSTEM AND METHOD - A device to attenuate EMI between a source and a load is provided. The device includes a first cable to electrically couple the source and the load and a second cable positioned adjacent to the first cable and configured to attenuate a common-mode current. | 09-02-2010 |
20110032048 | FILTERING DEVICE AND DIFFERENTIAL SIGNAL TRANSMISSION CIRCUIT CAPABLE OF SUPPRESSING COMMON-MODE NOISES UPON TRANSMISSION OF A DEIFFERENTIAL SIGNAL - A filtering device is capable of suppressing common mode noises upon transmission of a differential signal, and includes a differential transmission line, a grounding layer, a dielectric unit and a conductive structure. The differential transmission line has a pair of conductive traces spaced apart from each other. The grounding layer is spaced apart from the differential transmission line. The dielectric unit is disposed between the differential transmission line and the grounding layer. The conductive structure is embedded in the dielectric unit, is coupled electrically to the conductive traces and the grounding layer, and cooperates with the differential transmission line, the grounding layer and the dielectric unit to form a stacked structure that has an effective negative permittivity, thereby suppressing the common mode noises coupled to the conductive traces. A differential signal transmission circuit is also disclosed. | 02-10-2011 |
20110043297 | DUAL FUNCTION TUNED L-C INPUT TRAP PASSIVE EMI FILTER COMPONENT NETWORK FOR AN ACTIVE IMPLANTABLE MEDICAL DEVICE - Decoupling circuits are provided which transfer energy induced from an MRI pulsed RF field to the housing for an active implantable medical device (AIMD) which serves as an energy dissipating surface. A novel L-C input trap filter is provided which has a dual function. The L-C trap acts as a broadband low pass EMI filter while at the same time also acts as an L-C trap in order to divert induced RF energy from the lead to the housing of the AIMD. | 02-24-2011 |
20110050355 | EMI SUPPRESSOR HAVING BANDPASS FILTERING FUNCTION - An electromagnetic interference (EMI) suppressor having a bandpass filtering function is provided. The EMI suppressor is disposed on a substrate, and includes a signal line, a ground line, an open-circuit line, a first line group, and a second line group. The signal line has an input terminal and an output terminal for feeding in and feeding out electromagnetic wave signals respectively. One terminal of the ground line is connected to the signal line and the other terminal is a ground terminal. One terminal of the open-circuit line is connected to the signal line and the other terminal is an open-circuit terminal. The first line group is formed by a first open-circuit line and a second open-circuit line, and is connected to the signal line. The second line group is formed by a third open-circuit line and a fourth open-circuit line, and is connected to the signal line. | 03-03-2011 |
20110148541 | TRANSMISSION MEDIUM - A transmission medium includes: first and second lines # | 06-23-2011 |
20110163823 | ELECTROMAGNETIC BANDGAP STRUCTURE AND CIRCUIT BOARD - In an electromagnetic bandgap structure including a plurality of conductive plates and a stitching via part, in which the plurality of conductive plates are placed on a first planar surface, the stitching via part includes a first via having one end part connected to one of the two conductive plates, a second via having one end part connected to the other of the two conductive plates, a spiral connector forming a spirally-shaped serial link structure on at least one vertical planar surface that is perpendicular to the first planar surface, a first conductive pattern connecting one end part of the spiral connector and the other end part of the first via with each other and a second conductive connecting pattern connecting the other end part of the spiral connector and the other end part of the second via with each other. | 07-07-2011 |
20110267151 | RF SAFE TRANSFORMER-COUPLED TRANSMISSION LINE FOR MRI WITH REDUCED ARTIFACTS - The present invention relates to an electrically conductive transmission line ( | 11-03-2011 |
20110316641 | RADIO FREQUENCY DEVICE - A radio frequency device is disclosed, which includes an isolation substrate, a ground layer, a first signal end, a second signal end, a radio frequency circuit, and an impedance unit. The isolation substrate includes a first plane and a second plane. The ground layer is disposed on the second plane of the isolation substrate for providing grounding. The first signal end is formed on the first plane of the isolation substrate. The second signal end is formed on the first plane of the isolation substrate and coupled to the ground layer. The radio frequency circuit is disposed on the first plane of the isolation substrate and coupled to the first signal end. The impedance unit is disposed on the first plane of the isolation substrate and coupled to the first signal end and the second signal end. | 12-29-2011 |
20120007689 | EMI TRAP USING MICROWAVE CIRCUIT - In one example embodiment, a transmitter comprises a first component coupled to receive a signal for transmission and a second component communicatively coupled to the first component to transmit the signal over a transmission medium. The transmitter further comprises a planar transmission line formed on a substrate and disposed between the first and second components to couple the signal from the first component to the second component. The planar transmission line includes a first transmission line element formed on the substrate and configured to suppress radiation of EMI at a predetermined frequency. | 01-12-2012 |
20120025925 | COMMON MODE NOISE SUPPRESSION CIRCUIT - A common mode noise suppression circuit applicable to differential signal transmission performs common mode noise suppression with respect to differential signals transmitted by a transmission line. An inductance-capacitance resonant structure is formed based on electromagnetic coupling combining a ground structure to suppress common mode noise of differential mode signals at broadband meanwhile keeping low loss of the differential mode signals at broadband via differential transmission lines. By this, the common mode noise suppression circuit performs broadband suppression with related to the common mode noise within frequency scope of several GHzs without affecting the differential mode signals and improves manufacturing process miniaturization to decrease cost. | 02-02-2012 |
20120092087 | NOISE REDUCTION DEVICE FOR PORT OF DSL FILTER AND METHOD THEREOF - A noise reduction device for ports of DSL filters and a method thereof are revealed. A plurality of signal transmission line sets is arranged at the ports of a DSL filter. A first cross part is formed between the first signal transmission line and the second signal transmission line of the first signal transmission line set. Before the first cross part, the first signal transmission line of the second signal transmission line set is adjacent to the second signal transmission line of the first signal transmission line set while after the first cross part, the first signal transmission line of the second signal transmission line set is adjacent to the first signal transmission line of the first signal transmission line set. Thus the noises induced by interference between two adjacent signal transmission lines cancel each other out. Therefore, no interference noise occurs between two adjacent signal transmission lines. | 04-19-2012 |
20120133453 | Circuit for Reducing Electromagnetic Interference Noise - Disclosed is a circuit for reducing EMI noise in a driver IC including at least one or more input ports, and at least one or more output ports, the circuit including a power unit connected to any one of the input ports to output a current to the driver IC, and at least one or more resistors arranged in series between the at least one or more output ports of the driver IC and an output terminal connecting an exterior device operated by the driver IC. | 05-31-2012 |
20120139656 | MAGNETIC FIELD SYSTEM AND METHOD FOR MITIGATING PASSIVE INTERMODULATION DISTORTION - A magnetic field method for mitigating passive intermodulation distortion. The method is useful both for mitigating passive intermodulation and for easily locating dominant sources of it, even in shielded components. | 06-07-2012 |
20120139657 | COMMUNICATION SYSTEM - A communication system of the present invention includes: a communication coupler that transmits a signal; and a signal transmitting apparatus that communicates by propagating, as an electromagnetic field, the signal transmitted from the communication coupler, the communication coupler includes a coupler case disposed on the signal transmitting apparatus, a noise suppressing section is provided on a lower end surface of the coupler case, the lower end surface faces the signal transmitting apparatus, and the noise suppressing section suppresses noise by creating a high impedance. | 06-07-2012 |
20120161894 | POWER DISTRIBUTION NETWORK FOR ENHANCING SIGNAL QUALITY - A power distribution network includes a reference plane placed under a signal line, the reference plane having a discontinuous structure; and a return current path for the signal line, the return current path being formed on the reference plane. The return current path has any one shape among the same shape as the signal line, a proportional shape to the signal line and an expansion shape of the signal line. | 06-28-2012 |
20120188025 | STRUCTURE AND METHOD FOR REDUCING EM RADIATION, AND ELECTRIC OBJECT AND MANUFACTURING METHOD THEREOF - A method for reducing EM radiation comprises at least one first resonance line disposed on one of electric surfaces, which is disposed at a side of a transmission line structure on one of the electric surface. The resonance line crosses over a slot of another electric surface. The slot is etched on a corresponding electric surface. In addition, the transmission line structure crosses over the slot of the electric surface. Then, the first resonance line connects the electric surface having the slot with another electric surface. It can adjust at least one of a length, a width and a shape of the first resonance line, to make an input impedance seen from a crossed point between the transmission line structure and the slot approximately 0. | 07-26-2012 |
20120194290 | ELECTROMAGNETIC NOISE SUPPRESSION CIRCUIT - An electromagnetic noise suppression circuit is provided. The suppression circuit comprises a first substrate, a first grounding plane and at least one transmission line. The transmission line is configured on a top surface of the first substrate and the first grounding plane is configured on the bottom surface of the first substrate. The first grounding plane comprises a first distributed coupling structure. The first distributed coupling structure and the transmission line can be equivalent to an inductor-capacitor resonant circuit. The electromagnetic noise within a designated frequency band can be suppressed by the distributed coupling structure of the electromagnetic noise suppression circuit to avoid interfering the signal transmitted by the transmission line and the electromagnetic radiation induced by the electromagnetic noise. | 08-02-2012 |
20120194291 | COMMON-MODE SUPPRESSION FILTER FOR MICROSTRIP 10-Gb/s DIFFERENTIAL LINES - Several implementations disclosed herein are directed to compact-size common-mode filters that are suitable for implementation in densely populated multilayered printed circuit boards (PCBs) with numerous I/O ports—as well as integrated circuit (IC) chips and I/O connectors—to suppress EMI emissions. Certain implementation are specifically directed to filters for four differential signal lines that carry 10-Gb/s digital signals. These implementations provide common-mode suppression within gigahertz frequencies where common-mode noise comprising 10-Gb/s signal is problematic, but without any significant degradation of differential-mode signals. Moreover, certain of these implementations are directed to compact-size filters that suppress common-mode signal noise at 10.3 GHz associated with the fundamental harmonic 10 Gb/s-signals of XFI and SFI. In other implementations, a combination of filters is presented to provide common-mode noise suppression at both the first harmonic frequency of 10.3 GHz as well as the second harmonic frequency of 20.6 GHz. | 08-02-2012 |
20120218050 | POWER SUPPLY CABLE FOR POWER LINE COMMUNICATION EQUIPMENT - A connector including a magnetic core and a cable. The cable includes a first conductor and a second conductor. The first conductor and the second conductor are wound around each other. The cable is wound a plurality of times through a center of and around the magnetic core. A first end of the first conductor and a first end of the second conductor are configured to connect to power line communication equipment. A second end of the first conductor and a second end of the second conductor are configured to connect to a power line. | 08-30-2012 |
20120249257 | CIRCUIT FOR IMPROVING THE IMMUNITY PERFORMANCE OF A VEHICLE NETWORK - In a vehicle network for controlling electronic devices of the type having a network driver with at least one output line connected to the network through a common mode choke. A circuit for improving the immunity of the network includes a resistor and a capacitor connected in series between the signal output line and ground. The series resistor and capacitor protect the network from communication errors. | 10-04-2012 |
20120326799 | Power Conversion Apparatus - There is provided a power conversion apparatus which allows a noise current or voltage to be suppressed at a low cost and in a small size, the noise current or voltage mixing into the power conversion apparatus by propagating through a control wiring connected to an external appliance. | 12-27-2012 |
20130015922 | TRANSMISSION UNIT WITH REDUCED CROSSTALK SIGNALAANM Liu; Da-YuAACI New Taipei CityAACO TWAAGP Liu; Da-Yu New Taipei City TWAANM Liu; Da-YungAACI New Taipei CityAACO TWAAGP Liu; Da-Yung New Taipei City TWAANM Liu; Teng-LanAACI New Taipei CityAACO TWAAGP Liu; Teng-Lan New Taipei City TWAANM Jang; Ben-HwaAACI New Taipei CityAACO TWAAGP Jang; Ben-Hwa New Taipei City TW - A transmission unit with reduced crosstalk signal includes a first conductor group having at least one first conductor surrounded by a first sheath and at least one second conductor surrounded by a second sheath. The first and the second conductor are axially arranged corresponding to one another. The first sheath has a dielectric coefficient higher than that of the second sheath, so that a difference in dielectric property exists between the first and the second conductor to enable reduction of crosstalk occurred during high-speed signal transmission over the transmission unit. | 01-17-2013 |
20130127560 | HIGH-FREQUENCY SIGNAL TRANSMISSION LINE - Unwanted radiation is reduced in a high-frequency signal transmission line that includes a ground conductor provided with an opening that overlaps a signal line. A dielectric element assembly has a relative dielectric constant ∈ | 05-23-2013 |
20130141181 | RESONANCE REDUCING CIRCUIT BOARD - A circuit card is provided that includes ground traces that extend from a resistor to a commoning bar, where a resultant electrical length between the resistor and the commoning bar and is configured to reduce energy carried on the ground terminals that could otherwise result in cross-talk. In an embodiment, the ground trace may be configured in a meandering manner. In another embodiment, the ground trace may be split and joined by an inductor. | 06-06-2013 |
20130147571 | Balanced Feed Bushing Device for Antennas - An HF feed bushing device is provided that is designed to connect an HF transmitter/receiver to an antenna via an external medium by means of a balanced two-wire line. The balanced two-wire line is at least partially encapsulated in a central part of a closed conduit including a wall isolating the balanced two-wire line from the external medium. Applications: Feeding of antennas via balanced two-wire lines. | 06-13-2013 |
20130147572 | POWER SUPPLY CABLE FOR POWER LINE COMMUNICATION EQUIPMENT - A method including receiving power, from a power line, at a device configured to communicate via the power line. The power from the power line is received at the device via a power cord of the device being connected, via a connector, to a power outlet from which the power of the power line is supplied. The connector is coupled to a first end of the power cord. The device is coupled to a second end of the power cord. The method further includes supplying a signal generated by the device to a choke located on the power cord. The choke is located closer to the first end of the power cord than to the second end of the power cord. The method further includes transmitting the signal from the choke to the power line for communication via the power line. | 06-13-2013 |
20130147573 | Electromagnetic Wave Transmission Medium and Electromagnetic Wave Transmission System - The disclosed electromagnetic wave transmission medium prevents electromagnetic leakage during high-power electromagnetic wave transmission. The sheet-form electromagnetic wave transmission medium is configured from a first mesh conductor used in transmission of electromagnetic waves having a first power; and a second mesh conductor used in transmission of electromagnetic waves having a second power. By using two mesh conductors, when said sheet-form electromagnetic wave transmission medium is used, the conduction density of the surface region where electromagnetic waves are extracted to be used for power supply assumes a coarser state than that of the other surface region. | 06-13-2013 |
20140028412 | EBG STRUCTURE AND CIRCUIT BOARD - An EBG (Electromagnetic Band Gap) structure according to an embodiment includes: an electrode that is made of a first conductor; a first insulating layer that is provided on the electrode; a patch unit that is provided in substantially parallel with the electrode on the first insulating layer, the patch unit including a first gap, the patch unit being made of a second conductor; a second insulating layer that is provided on the patch unit; a first via that is provided between the patch unit in the first insulating layer and the electrode and connected to the patch unit and the electrode; and a second via that is provided in the first and second insulating layers, the second via piercing the first gap and being connected to the electrode. | 01-30-2014 |
20140055208 | RESONATOR, MULTILAYER BOARD AND ELECTRONIC DEVICE - A resonator is connected to a first plane which is one of a power plane and a ground plane, wherein the power plane and the ground plane are apart from each other in an up-down direction. The resonator comprises a connecting portion and a body portion. The connecting portion is connected to the first plane. The connecting portion extends in the up-down direction beyond a second plane, which is a remaining one of the power plane and the ground plane, while not being in electrical contact with the second plane. The body portion is connected to the connecting portion while not being in contact with the second plane. The body portion is arranged so that the second plane is located between the body portion and the first plane in the up-down direction. | 02-27-2014 |
20140062611 | FILTERING DEVICE WITH SLOTTED GROUND STRUCTURE - The present invention is related to a filtering device with slotted ground structure, comprising a first substrate, a second substrate and a pair of differential signal lines, in which a ground plane having slotted ground structure is provided between the first substrate and the second substrate. Each of the two differential signal lines is symmetric to each other and comprises a first line segment being horizontally provided on the top surface of the first substrate and a second line segment being horizontally provided on the bottom surface of the second substrate, respectively. The first line segment is connected to the second line segment through a vertically disposed conductive via. Thereby, a common-mode noise within a specific frequency band may be suppressed effectively, so as to avoid interference a differential-mode signal transmitted on the differential signal lines, due to the slotted ground structure etched on the ground plane. | 03-06-2014 |
20140062612 | SIGNAL TRANSMISSION CIRCUIT HAVING CROSSTALK CANCELLATION UNIT - A signal transmission circuit may include a main driving unit configured to drive a first signal transmission line with given driving force in response to a first input signal, and a crosstalk cancellation unit configured to differentiate a signal transferred through a second signal transmission line, which is adjacent to the first signal transmission line, and incorporate a differentiated value into the first signal transmission line. | 03-06-2014 |
20140091874 | Composite Electromagnetic Isolation Filters - The present disclosure is directed to systems and methods for operating, designing, testing and verifying the performance of wireless communication devices. Specifically, the present systems and methods can passively attenuate unwanted electromagnetic interference (EMI) without degrading signal quality of predetermined frequency using a novel versatile module including a RF absorbing material in a composite medium surrounding the conducting signal lines. Utilizing varying permeability media, the present invention offer a robust platform to eliminate unwanted noise while maintaining a desirable control and power interfaces used for testing of wireless communication systems. | 04-03-2014 |
20140125424 | ADAPTIVE ON DIE DECOUPLING DEVICES AND METHODS - Semiconductor dies and methods are described, such as those including a first capacitive pathway having a first effective series resistance (ESR) and a second capacitive pathway having an adjustable ESR. One such device provides for optimizing the semiconductor die for different operating conditions such as operating frequency. As a result, semiconductor dies can be manufactured in a single configuration for several different operating frequencies, and each die can be tuned to reduce (e.g. minimize) supply noise, such as by varying the ESR or the capacitance of at least one of the pathways. | 05-08-2014 |
20140159828 | Stacked Microstrip Circuit with Integrated Support and Shielding Structure - The present invention is directed to an assembly that includes at least one first microstrip network having at least one first transmission line disposed on a first surface of a first dielectric layer. The first dielectric layer includes a first ground plane disposed on a second surface of the dielectric layer. At least one second microstrip network includes at least one second transmission line disposed on a first surface of a second dielectric layer, the second dielectric layer including a second ground plane disposed on a second surface of the second dielectric layer. The at least one second microstrip network is inverted relative to the at least one first microstrip network. At least one integrated support and shielding (ISS) structure is disposed between the at least one second microstrip network and the at least one first microstrip network. The ISS structure includes a first cavity accommodating the at least one first microstrip network and a second cavity accommodating at least one second microstrip network. The first cavity is configured in accordance with at least one RF performance criterion associated with the at least one first microstrip network. The second cavity is configured in accordance with at least one RF performance criterion associated with the at least one second microstrip network. | 06-12-2014 |
20140176252 | DIFFERENTIAL TRANSMISSION CIRCUIT AND PRINTED CIRCUIT BOARD - A differential transmission circuit includes differential signal transmission and reception units connected by a differential signal wiring having an inductor unit composed of magnetically coupled first and second inductors provided on first and second signal lines, an input-side capacitor unit including a first input-side capacitor having one terminal connected to a first inductor signal input terminal and the other terminal grounded and a second input-side capacitor having one terminal connected to a second inductor signal input terminal and the other terminal grounded, and an output-side capacitor unit including a first output-side capacitor having one terminal connected to a first inductor signal output terminal and the other terminal grounded and a second output-side capacitor having one terminal connected to a second inductor signal output terminal and the other terminal grounded. | 06-26-2014 |
20140240055 | ELECTRONIC CIRCUIT AND ELECTRONIC DEVICE - An electronic circuit according to an embodiment includes a power supply line having a first EBG pattern, the first EBG pattern including a plurality of first linear parts and a first slit, each of the first linear parts extending along a direction in which the power supply line extends and surrounded by the first slit except one end of the first linear part. | 08-28-2014 |
20140253258 | SYSTEM FOR REDUCING ELECTROMAGNETIC INDUCTION INTERFERENCE - An electromagnetic band gap device is provided, comprising: a conductive plane; a non-conductive substrate located over the conductive plane; and an electromagnetic band gap unit cell that includes a first via located in the non-conductive substrate and filled with a conductive material, a second via located in the non-conductive substrate and filled with the conductive material, a first conductive surface located on the non-conductive substrate over the first via, and a second conductive surface located on the non-conductive substrate over the second via, wherein the electromagnetic band gap unit cell is configured to operate as an LC resonant circuit in conjunction with the conductive plane, at least one gap is located in the electromagnetic band gap unit cell, the at least one gap being located in the first via, in the first conductive surface, in the second conductive surface, and in the second via. | 09-11-2014 |
20140327488 | MULTIBAND WHIP ANTENNA - A multi-band whip antenna having a 30 MHz to 2 GHz bandwidth and an L-band dipole has its coverage extended up to 6 GHz by eliminating nulls and reducing VSWR problems that are cured through the utilization of a sleeve over the feedpoint of the L-band antenna. Chokes in the form of sleeves are provided at either end of the L-band dipole to shorten the L-band antenna for preventing reverse polarity currents at the L-band antenna feedpoint, with the antenna further including the use of double shielded meanderlines to provide improved performance between 410-512 MHz and in which a capacitance sleeve is added at the bottom of the L-band antenna to effectively elongate the antenna below the L-band to permit operation below 700 MHz. | 11-06-2014 |
20150022278 | ELECTRONIC DEVICE FOR ELIMINATING WIRELESS NOISE INTERFERENCE - In an embodiment of the disclosure, an electronic device arranged for eliminating wireless noise interference is provided. The electronic device includes a circuit board and two first metal components. The metal components are arranged on different sides of the circuit board. Each of the first metal components comprises a first terminal and a second terminal opposite to the first terminal The first terminal is coupled to the circuit board and the second terminal is open loop. The length of the first metal component is about one-fourth wavelength of a pre-determined frequency. | 01-22-2015 |
20150070102 | Transmission Line and Filtering Module Thereof - A transmission line includes a signal terminal for inputting a first signal and a second signal, a first wire coupled to the signal terminal for transmitting the first signal, a second wire coupled to the signal terminal for transmitting the second signal, a filtering module coupled to the first and second wires for receiving the first and second signals to filter out noises of the first and second signal, a third wire coupled to the filtering module for transmitting the first signal, and a fourth wire coupled to the filtering module for transmitting the second signal. | 03-12-2015 |
20150130552 | TUNABLE GUARD RING FOR IMPROVED CIRCUIT ISOLATION - A tunable guard ring for improved circuit isolation is disclosed. In an exemplary embodiment, an apparatus includes a closed loop guard ring formed on an integrated circuit and magnetically coupled by a selected coupling factor to a first inductor formed on the integrated circuit. The apparatus also includes a tunable capacitor forming a portion of the closed loop guard ring and configured to reduce magnetic field coupling from the first inductor to a second inductor. | 05-14-2015 |
20150130553 | CROSSTALK REDUCTION IN SIGNAL LINES BY CROSSTALK INTRODUCTION - A circuit component is described herein. The circuit component includes a first signal line to propagate in a first direction and a second signal line to propagate a second direction. The circuit component includes a region to introduce crosstalk within the region that reduces another crosstalk generated at a location remote from the region based on a change in propagation direction of the first signal line and second signal line. | 05-14-2015 |
20150318834 | COMMON MODE NOISE REDUCTION CIRCUIT - A common mode noise reduction circuit includes at least one first input end, at least one second input end, at least one first output end, and at least one second output end. The circuit is further provided with at least one resistor, at least one inductor, and at least one capacitor, symmetrically disposed within the circuit loop defined by the four ends. Common mode noise, after entering the circuit, is transformed into heat by the resistance of the circuit such that the common mode noise is suppressed. Differential mode signals, on the contrary, after entering the circuit, can pass through the circuit with minimum loss. | 11-05-2015 |
20160036112 | DIFFERENTIAL SIGNALING CABLE, TRANSMISSION CABLE ASSEMBLY USING SAME, AND PRODUCTION METHOD FOR DIFFERENTIAL SIGNALING CABLE - A differential signaling cable includes a pair of signal conductors provided in parallel, longitudinally within the differential signaling cable, an insulator covering a periphery of the pair of signal conductors as a whole, wherein only the insulator is between the pair of signal conductors, and a shield conductor provided on an outer periphery of the insulator. An interval between the pair of signal conductors is set so that an even-mode impedance of the pair of signal conductors having the interval fixed by embedment within the insulator and covered by the shield conductor, is in a range from 1.5 to 1.9 times an odd-mode impedance for improved skew and differential mode insertion loss experienced during a transmission of high-speed signals of at least 10 Gbps. | 02-04-2016 |
20160036408 | SNAP-ON COAXIAL CABLE BALUN AND METHOD FOR TRAPPING RF CURRENT ON OUTSIDE SHIELD OF COAX AFTER INSTALLATION - Apparatus and method for a radially attachable RF trap attached from a side to a shielded RF cable. In some embodiments, the RF trap creates a high impedance on the outer shield of the RF cable at a frequency of RF signals carried on at least one inner conductor of the cable. In some embodiments, an RF-trap apparatus for blocking stray signals on a shielded RF cable that has a peripheral shield conductor and a inner conductor for carrying RF signals includes: a case; an LC circuit having a resonance frequency equal to RF signals carried on the inner conductor; projections that pierce and connect the LC circuit to the shield conductor; and an attachment device that holds the case to the cable with the LC circuit electrically connected to the shield conductor of the shielded RF cable. | 02-04-2016 |
20160087323 | ELECTROMAGNETIC NOISE FILTER DEVICE AND EQUIVALENT FILTER CIRCUIT THEREOF - The present invention is related to an electromagnetic noise filter device and an equivalent filter circuit thereof. The filter device comprises a substrate, a transmission line and a ground plane having slotted ground structure. The transmission line is configured on the top surface of the substrate, and the grounding plane is configured on the bottom surface of the substrate. At least one pair of impedance elements are configured within the slotted ground structure. The transmission line can be electromagnetic coupled to the slotted ground structure and the impedance elements so as to form an equivalent filter circuit. Thereby, the electromagnetic noises on at least one specific frequency may be absorbed by the impedance elements of the filter device so as to avoid the electromagnetic reflection induced by the electromagnetic noise and interfering the signal transmitted on the transmission line. | 03-24-2016 |
20160156086 | Power and Signal Extender and Related Circuit Board | 06-02-2016 |
20160173052 | POWER ELECTROMAGNETIC INTERFERENCE SUPPRESSION FILTER | 06-16-2016 |
20160173053 | POWER SHUNT ELECTROMAGNETIC INTERFERENCE FILTER | 06-16-2016 |
20160181684 | STANDING WAVE DAMPING ON A WAVEGUIDE CARRYING A SIGNAL | 06-23-2016 |
20160197389 | ELECTROMAGNETIC INTERFERENCE SUPPRESSING STRUCTURE AND ELECTRONIC DEVICE HAVING THE SAME | 07-07-2016 |
20180027707 | HOUSING AND ELECTRONIC DEVICE | 01-25-2018 |