| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 333177000 | Transformer coupled | 28 |
| 20080238573 | Coupling Circuit and Network Device for Power Line Communication - A coupling circuit is used in a power line communication system for bridging a signal of a high frequency between lines of a single-phase three-line type which feed an electric current having a low frequency as compared to the high frequency of the signal and which include a first power source line, a second power source line and a neutral line. The coupling circuit has a transformer operating at a high frequency and having a primary winding and a secondary winding. The primary winding is provided for connecting with a device having a communication capability of the signal. The secondary winding has a pair of end terminals provided for connections to the first and second power source lines, respectively, and an intermediate tap provided between the pair of the end terminals for a connection to the neutral line. Capacitors having a capacitance effective to pass the signal of the high frequency and effective to cut off the electric current of the low frequency are inserted into the respective connections to the first power source line, the second power source line and the neutral line. | 10-02-2008 |
| 20080252395 | Compact Coils for High Performance Filters - A coil structure for a filter device includes a first metallization deposited over a substrate and oriented in a first coil. The first coil extends horizontally across the substrate while maintaining a substantially flat vertical profile. A second metallization is deposited over the substrate and oriented in a second coil. The second coil is magnetically coupled to the first coil. A portion of the second coil is oriented interiorly of the first coil. A third metallization is deposited over the substrate and oriented in a third coil. The third coil is magnetically coupled to the first and second coils. A portion of the third coil is oriented interiorly of the second coil. | 10-16-2008 |
| 20080315971 | Power Line Data Signal Attenuation Device and Method - A device and method for attenuating high frequency signals on a power line carrying power is provided. In one embodiment the device may include a toroid shaped core formed of magnetically permeable material and having an inner surface to be disposed substantially around the entire circumference of the power line and a winding formed of a conductor that encircles the toroid. The conductor may include a first spiral coil comprised of a plurality of insulated loops such as concentric loops. The first coil is configured to act as an impedance to high frequency signals traversing the conductor and to allow signals below one hundred hertz to traverse the conductor substantially unimpeded to thereby prevent saturation of the core by the power carried by the power line. | 12-25-2008 |
| 20090243757 | Modular jack having an improved magnetic module - A modular jack ( | 10-01-2009 |
| 20100007439 | TRANSFORMER - A transformer is provided with four capacitors and four inductors. The first capacitor is electrically connected between a first port and ground in series. The first inductor is electrically connected to the first port in series. The second capacitor is electrically connected between the first inductor and ground in series. The second inductor is electrically connected between the first inductor and the second capacitor in series. The third capacitor is electrically connected between a second port and ground in series. The third inductor is electrically connected to the second port in series. The fourth capacitor is electrically connected between a third port and ground in series. The fourth inductor is electrically connected between the third inductor and the third port in series. | 01-14-2010 |
| 20100102900 | PROCESS FOR REDUCTION OF THE COMMON MODE CURRENT FOR POWER LINE COMMUNICATIONS EQUIPMENT - It permits common mode currents to be reduced in communications equipment using the mains network as transmission medium, in order to adapt the emission values of common mode to standards on power line communications corresponding to each country. | 04-29-2010 |
| 20100109806 | TRANSFORMER - A transformer includes at least one input conductive line having both ends provided as input ports of a positive (+) signal and a negative (−) signal, respectively, one output conductive line disposed adjacent to the at least one input conductive line to be electromagnetically coupled to the at least one input conductive line, and having one end connected to the ground, a first resonator disposed between the other end of the output conductive line and the ground, and a second resonator having one end connected to the other end of the output conductive line and the other end provided as an output port. | 05-06-2010 |
| 20100277256 | COMMON-MODE FILTER WITH COUPLED INDUCTANCES - A common-mode filter including, in series between a first input terminal and a first output terminal, a first and a second positively coupled inductive elements; in series between a second input terminal and a second output terminal, a third and a fourth positively coupled inductive elements; and in series between each midpoint of said series connections of inductive elements and the ground, a capacitive element and a fifth inductive element. | 11-04-2010 |
| 20110304411 | MAGNETIC INTERFACE CIRCUIT - A noise filtering magnetic interface circuit used for an electrical connector is provided. The magnetic interface circuit includes a number of signal channels and a capacitor ( | 12-15-2011 |
| 20130021114 | DEVICE FOR IMPROVING POWER QUALITY - A device for improving power quality is installed on a power line, for removing noise that flows into the power line, characterized by: a reactor having a first coil and a second coil wound on a core disposed between the input end and the output ends of the power line, wherein in the reactor, the first end of the first coil is connected to the input end of a first power line, the second end of the first coil is connected to the output end of the first power line, and the first end of the second coil is connected to the output end of the second power line, and the second end of the second coil is connected to the input end of the second power line. | 01-24-2013 |
| 20130154765 | CROSS-COUPLED BANDPASS FILTER - A cross-coupled bandpass filter includes first, second, third and fourth resonators such that magnetic couplings are generated between the first and second resonators, between the third and fourth resonators and between the first and fourth resonators, a capacitive coupling is generated between the second and third resonators, and the magnetic coupling between the first and fourth resonators has a polarity opposite to that of the capacitive coupling between the second and third resonators, thereby generating two transmission zeros in a transmission rejection band. | 06-20-2013 |
| 20130162370 | SYSTEMS AND METHODS FOR PROVIDING AN ELECTRIC CHOKE - Systems and methods for an electric choke are provided. The choke may be provided as part of a power transmission arrangement that includes a cable for electrically coupling a power source and a powered device having a ground node and a wire separate from the cable providing a path for a common-mode current through the ground node. The power transmission arrangement also includes an unbalanced choke coupled between the power source and the powered device, wherein a number of turns of the cable in the choke is different than a number of turns of the wire in the choke. | 06-27-2013 |
| 20130257564 | POWER LINE FILTER FOR MULTIDIMENSIONAL INTEGRATED CIRCUITS - An interposer element in a multidimensional integrated circuit with stacked elements has one or more conductors, especially power supply lines, coupled through decoupling networks defining low impedance shunts for high frequency signals to ground. The interposer has successive tiers including silicon, metal and dielectric deposition layers. The decoupling network for a conductor has at least one and preferably two reactive transmission lines. A transmission line has an inductor in series with the conductor and parallel capacitances at the inductor terminals. The inductors are formed by traces in spaced metal deposition layers forming coil windings and through vias connecting between layers to permit conductor crossovers. The capacitances are formed by MOScaps in the interposer layers. An embodiment has serially coupled coils with capacitances at the input, output and junction between the coils, wherein the coils are magnetically coupled to form a transformer. | 10-03-2013 |
| 20130307643 | BALANCE FILTER - A balance filter includes an unbalanced terminal, a first balanced terminal, a second balanced terminal, a ground terminal, an unbalanced-side coupling coil, a balanced-side coupling coil electromagnetically coupled to the unbalanced-side coupling coil, and an unbalanced-side capacitor. The unbalanced-side capacitor, the unbalanced-side coupling coil, and a portion of the balanced-side coupling coil define an LC parallel resonant circuit. A first end of the balanced-side coupling coil is a terminal having the same polarity as that of a first end of the unbalanced-side coupling coil. A second end of the unbalanced-side coupling coil is connected to the first end of the balanced-side coupling coil. | 11-21-2013 |
| 20130328642 | Miniaturized Passive Low Pass Filter - A low pass filter circuit ( | 12-12-2013 |
| 20140125430 | NOISE FILTER - A noise filter includes a first magnetic core that includes a plurality of leg portions, and a first connection portion and a second connection portion, which connect both ends of the leg portions, a plurality of coils that are wound on the leg portions, respectively, and a second magnetic core that is configured to be attachable to and detachable from the first magnetic core such that a closed magnetic path, which intersects with each of the first connection portion and the second connection portion and which passes through the leg portions, is formed, in which the first magnetic core includes a normal mode inductance, and the closed magnetic path includes a common mode inductance. | 05-08-2014 |
| 20140145796 | COMMON MODE FILTER - A common mode filter | 05-29-2014 |
| 20140210571 | TRANSFORMER FILTER ARRANGEMENT - A transformer filter arrangement including a transformer having a first winding and a second winding is provided. Both of the first and the second windings are located between an outer border and an inner border, which is inside the outer border. The transformer filter arrangement further includes at least one reactive sub circuit, each including at least one inductor. The first winding of the transformer is divided into a plurality of winding segments. At least a first one of the at least one reactive sub circuit being connected in series with the winding segments of the first winding between two such winding segments, and having at least one of the at least one inductor located inside said inner border. | 07-31-2014 |
| 20140266506 | Transformer Filter Arrangement - A transformer filter arrangement ( | 09-18-2014 |
| 20140300433 | DRIVE OUTPUT HARMONIC MITIGATION DEVICES AND METHODS OF USE THEREOF - A filter for filtering a three-phase electrical power waveform produces a three-phase output power waveform. The filter has an inductor with three sets of first and second coils, each having a capacitor connected in series therewith. Each of the three sets of first and second coils has a tap intermediate the first and second coils where the output waveform is present, each tap capable of being connected to a load. In some embodiments, the inductor is passive adaptive and includes resistors for reducing current in-rush. | 10-09-2014 |
| 20140306781 | MAGNETIC INTERFACE CIRCUIT HAVING A 3-WIRE COMMON MODE CHOKE - A magnetic interface circuit for interfacing between a cable side and a circuit side of a networking communication channel. The magnetic interface circuit includes a transformer and a 3-wire common mode choke (CMC). The transformer has a first winding connected to the cable side of the channel and a second winding connected to the circuit side of the channel. Each of the first and second windings has two output ports. The 3-wire CMC has a center winding and two outer windings respectively connected to the output ports of the first or second winding. The center winding has two opposite ends both used for connecting to ground. | 10-16-2014 |
| 20140340171 | GFCI Compatible System and Method for Reducing Common Mode Noise - A GFCI Compatible System and Method for Reducing Common Mode Noise is described herein. Specifically the disclosure teaches a GFCI compatible system for reducing common mode noise (CMN). A CMN suppressor can comprise a hot line, neutral line and ground line. The first ends of the hot line, neutral line and ground line can be connected to a GFCI protected hot node, neutral node and ground node. The second ends of the hot line, neutral line and ground line can be connected to a common mode noise (CMN) sensitive device's hot line, neutral line, and ground line. The system can further comprise a toroidal coil inductor located on the ground line and a high pass filter connected between the neutral line and the ground line. The high pass filter can be located downstream from the toroidal coil inductor. | 11-20-2014 |
| 20150109073 | DEVICE FOR LINKING AN ELECTRICAL MEMBER TO A COMMUNICATION LINE - A connection device for connecting an electrical member to a communications line comprising at least two conductors for carrying differential signals. The connection device includes at least one data exchange interface component connected to the line to send and/or receive data, and a connection for connecting the electrical member to the line. The connection device also includes in succession, going from the connection to the interface components, at least a first transformer arranged to perform common mode filtering on each conductor of the communications line; a second transformer arranged to perform electrical isolation so as to isolate the communications line at least from the interface component; a third transformer connected in parallel with the second transformer and made up of two windings having terminals including terminals that are not connected to the second transformer and that are connected to frame ground of the electrical member; and a fourth transformer arranged to provide electrical isolation so as to isolate at least the interface component from frame ground. | 04-23-2015 |
| 20150303894 | DRIVE OUTPUT HARMONIC MITIGATION DEVICES AND METHODS OF USE THEREOF - A filter for filtering a three-phase electrical power waveform produces a three-phase output power waveform. The filter has an inductor with three sets of first and second coils, each having a capacitor connected in series therewith. Each of the three sets of first and second coils has a tap intermediate the first and second coils where the output waveform is present, each tap capable of being connected to a load. In some embodiments, the inductor is passive adaptive and includes resistors for reducing current in-rush. | 10-22-2015 |
| 20160020745 | TWO-STAGE NOISE FILTER AND ELECTRONIC DEVICE INCLUDING THE SAME - Disclosed are a two-stage noise filter, in which two filters are integrated, and an electronic device including the same. The two-stage noise filter includes a core configured to include a primary side and a secondary side opposite to the primary side; a first filter configured to include a first coil wound on the primary side of the core and a second coil wound on the secondary side of the core; a second filter configured to include a third coil wound on the primary side of the core in series with the first coil and a fourth coil wound on the secondary side of the core in series with the second coil; and an impedance balancer configured to keep a balance of impedance between the first and second filters. | 01-21-2016 |
| 20160191010 | METHOD AND APPARATUS FOR DUAL NOTCH RIPPLE FILTERING - An apparatus includes a self-coupled transformer, a first band stop filter and a tank circuit connected in series with the first band stop filter between first and second windings of the self-coupled transformer. An inductor of the tank circuit acts as an out-of-phase third winding of the self-coupled transformer. | 06-30-2016 |
| 20180026602 | METHOD AND APPARATUS FOR DUAL NOTCH RIPPLE FILTERING | 01-25-2018 |
| 333178000 | Including bandwidth adjusting, shaping, or stabilization means | 1 |
| 20090206950 | DYNAMIC HARMONIC FILTER FOR AN AC POWER SYSTEM - A dynamic harmonic filter for an AC power system comprising at least one voltage source (V) and at least one load. The harmonic filter comprises a current sensing or voltage injection transformer (T | 08-20-2009 |
