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| Number | Title | Issue Date |
| 8013686 | Miniaturized multilayer hybrid-phase signal splitter circuit A miniaturized multilayer hybrid-phase signal splitter circuit is proposed, which is fully equivalent in function to a conventional rat-race coupler, but with a specialized circuit layout structure that allows its IC implementation to be more miniaturized than the c... | 09/06/2011 |
| 7403081 | Broadband hybrid junction and associated methods The hybrid junction includes four electrically conductive planar windings, circular or rectangular, arranged so as to lie along an imaginary spherical or cylindrical surface. Each of the four electrically conductive windings is rotated from adjacent windings by abou... | 07/22/2008 |
| 7339453 | Differential mode inductor with a center tap A differential mode inductor includes a first inductor lead that receives a current. A first arm receives the current from the first inductor lead. A center tap receives the current from the first arm. A second arm receives the current from the center tap. The secon... | 03/04/2008 |
| 7276993 | Analog phase shifter using cascaded voltage tunable capacitor A circuit topology is configured to flatten out a phase- and amplitude-response over a specified range of frequencies. The circuit topology also provides a large cumulative phase-shift. In one embodiment, the circuit topology cascades a plurality of all-pass section... | 10/02/2007 |
| 7054279 | Method and apparatus for optimizing signal transformation in a frame-based communications network A method of and apparatus for optimizing signal transformation from a twisted pair transmission line to a combination transmitter and receiver for a frame-based communications network, the transmitter having a transmit output pair port for transmitting signals onto ... | 05/30/2006 |
| 6980000 | Coils for high frequency MRI NMR coils are formed from transmission line comprising a tuned LC circuit determined substantially from the distributed capacitance and inductance of the transmission line operated in common mode. Introduction of gaps staggered between opposite conductors of 2-condu... | 12/27/2005 |
| 6965280 | Three way power splitter A three way power splitter that has a small package size. The three way power splitter includes a multi-layered low temperature co-fired ceramic substrate. An input transformer and three output transformers are attached to the top of the substrate. The transformers ... | 11/15/2005 |
| 6963255 | Power splitter A power splitter that has a small package size and repeatable electrical characteristics. The power splitter includes a low temperature co-fired ceramic (LTCC) substrate with several layers. Electrical components such as resistors and capacitors are integrated withi... | 11/08/2005 |
| 6963256 | Low cost splitter A low cost power splitter that has a small size and can be used with automated surface mount manufacturing equipment. The power splitter includes a case having a cavity and a lead mounting surface. Leads are secured to the lead mounting surface. A substrate is mount... | 11/08/2005 |
| 6946924 | Low noise voltage controlled oscillator A voltage controlled oscillator, comprising a pair of transistors connected to a tank circuit, said tank circuit including a plurality of tuning diodes connected in parallel with an inductor, said tuning diodes having cathodes connected to a common connection. ... | 09/20/2005 |
| 6917254 | Balanced-to-unbalanced transformer A method relating to a balun for transmitting a high degree of high-frequency power where metal sheet element is soldered onto the loop conductor tract of the symmetrical circuit loop, the conductor track being configured as a printed circuit. The metal sheet elemen... | 07/12/2005 |
| 6873224 | Ninety degree coupler for radio frequency degraded circuits The present invention provides a ninety degree coupler for a frequency range of 100 mHz to gigaHertz ranges and including a minimum number of components employing a four port device which receives an input signal and splits it between a transformer coil and another ... | 03/29/2005 |
| 6871059 | Passive balun FET mixer A FET mixer uses a balun having a primary and secondary, with the primary coupled to an radio frequency signal input. The mixer also includes a pair of field effect transistors (FETs), wherein the gates are coupled to one another and to a local oscillator input. One... | 03/22/2005 |
| 6806790 | Miniature 180 degree power splitter A power splitter that has a small package size and repeatable electrical characteristics. The power splitter includes a low temperature co-fired ceramic (LTTC) substrate with several layers. Electrical components such as resistors, capacitors and ground planes are i... | 10/19/2004 |
| 6798309 | Arrangement for transmitting electrical signals and/or energy between parts that can be rotated in relation to each other What is described here is an arrangement for transmitting electrical signals and/or energy between parts that can be rotated relative to each other, whereof the part (transmitting part) on which the transmitter is disposed comprises at least two electrical conductor... | 09/28/2004 |
| 6788166 | Harmonic wave distortion suppressor A harmonic wave distortion suppressor includes a main body, at least a connecting pin and a coating. The main body is made of a first material and covered with a second material for absorbing an instantaneous high voltage or sharp wave. The connecting pin is coupled... | 09/07/2004 |
| 6784521 | Directional coupler A directional coupler that has a small package size and repeatable electrical characteristics. The directional coupler includes a low temperature co-fired ceramic (LTCC) substrate with several layers. Electrical components such as resistors and capacitors are integr... | 08/31/2004 |
| 6646504 | Broadband amplifier system having improved linearity and minimum loss An RF wideband amplifier system is provided that includes an M way splitter for receiving an RF input signal and splitting same into M RF signals for respective application to M power amplifier modules PAM-1 to PAM-M that amplify the M signals and apply t... | 11/11/2003 |
| 6639490 | Ninety degree coupler for radio frequency degraded circuits The present invention provides a ninety degree coupler for a frequency range of 100 mHz to gigaHertz ranges and including a minimum number of components employing a four port device which receives an input signal and splits it between a transformer coil a... | 10/28/2003 |
| 6624721 | Apparatus for acquiring a signal from an intermediate point on a series impedance source terminated unidirectional transmission line Apparatus for monitoring a signal at an intermediate point on a series impedance source terminated unidirectional transmission line employs a voltage probe, a current probe, and a summing element. The apparatus provides a useful output signal despite the ... | 09/23/2003 |
| 6563420 | Power line communications apparatus and method A power line communications apparatus and method for providing communications over power leads connecting two pieces of electrical equipment. One power lead is split into similarly sized first and second parallel conductors. The first and second conductor... | 05/13/2003 |
| 6542047 | Ninety degree splitter with at least three windings on a single core A 90 degree splitter which covers a wide frequency range of 1500 to 2500 Mhz in a small footprint of only 0.2 inches by 0.2 inches. This device does not use any capacitors which greatly simplifies the construction and lowers the cost in comparison to conv... | 04/01/2003 |
| 6314481 | Resistance integrated coupler between databus and terminal device having databus windings with high resistance wire with resistance being 1.5 times databus cable nominal characteristic impedance A system and method for constructing a resistance integrated coupler adapted to be coupled between a data bus and a terminal device. The system and method includes the steps of calculating a desired resistance of a set of data-bus windings, wherein the de... | 11/06/2001 |
| 6114924 | Dual core RF directional coupler An RF directional coupler includes dual binocular ferrite cores. The dual cores are positioned back-to-back, such that the adjacent surfaces of each core contact each other. Each core has two generally cylindrical holes that extend through the core. Each ... | 09/05/2000 |
| 6064872 | Totem pole mixer having grounded serially connected stacked FET pair A high dynamic range mixer apparatus and mixing method where a wide high dynamic range is achieved in part due to the use of a series pair of switching devices that are matched so as to afford complete or substantial cancellation of nonlinearity distortio... | 05/16/2000 |
| 5945957 | Window glass antenna apparatus A window glass antenna apparatus comprises two antennas exclusively for receiving respective AM and FM radio signals, a first impedance transformer disposed between the antennas and a signal cable for transforming impedance in an AM frequency band from hi... | 08/31/1999 |
| 5939956 | Multiple-mode piezoelectric filter with acoustic and electromagnetic separation between stages In a multiple-stage-connected multiple-mode piezoelectric filter unit having a single container 1 in which there are connected, in cascade, two multiple-mode piezoelectric filter elements comprising at least one piezoelectric substrate and two electrode g... | 08/17/1999 |
| 5917386 | Printed circuit transformer hybrids for RF mixers A high frequency partial transformer hybrid includes a first divided circular conductive element affixed to one side of an insulated substrate and a second split circular conductive element affixed to the other side of the substrate juxtaposed to the firs... | 06/29/1999 |
| 5752181 | Method and apparatus for reducing inermodulation distortion in a mixer Apparatus for reducing intermodulation distortion in a mixer output signal provides for back-to-back serial connected FET transistors joined at gate and source terminals and cancels intermodulation distortion. In one embodiment the apparatus provides firs... | 05/12/1998 |
| 5691987 | Frequency-channel multiplexer and demultiplexer A circuit of low complexity which selects arbitrary channels from a plurality of multichannel input signals and generates from a plurality of individual frequency channels a plurality of output signals whose channel composition can be freely selected, con... | 11/25/1997 |
| 5361409 | FET mixer having transmission line transformer A mixer comprising four FET transistors in a MMIC, a reflection transformer having tri-filar windings, an IF balun, an RF balun, a local oscillator balun, a pair of load resistors, a pair of series resistors, and a pair of series capacitors. The mixer is ... | 11/01/1994 |
| 5347245 | CATV signal splitter A signal splitter circuit accepts an input signal and conveys the input signal to two output ports. The circuit operates with minimal attenuation, throughout a very wide bandwidth, and also effectively isolates the output ports from each other. The signal... | 09/13/1994 |
| 5345604 | FM vehicle radio with modular phase shifters A modularly-designed FM vehicle radio for operation in connection with a plurality of antennas is disclosed, where the summing circuit consists of a series connection of the secondary coils of the output transformers of the input stages.... | 09/06/1994 |
| 5280648 | Double-balanced high level wide band RF mixer A double-balanced wide band RF mixer includes a first bifilar balun transformer coupling a high level source of RF signal to the primary windings of a pair of trifilar balun transformers. The two output windings of each trifilar transformer are connected ... | 01/18/1994 |
| 5272381 | Common mode filtered magnetic connector The present invention involves a connector for inductively coupling to a multi-wire data bus utilizing a magnetic core and associated coil for inducing signals upon the bus and for sensing such signals on the bus. The connector includes a pair of magnetic... | 12/21/1993 |
| 5175763 | Two-wire/four-wire converter A communication system has a two-wire communications path carrying analog transmission and reception signals, and a four-wire communications path including a two-wire transmission path carrying digital transmission signals and a two-wire reception path ca... | 12/29/1992 |
| 5097234 | Passive impedance matching device A passive impedance matching device incorporates a pair of power splitters, each having a transformer core with a center tapped winding shunted by a resistance having a predetermined value. The power splitter windings have their center taps connected to t... | 03/17/1992 |
| 5081648 | Current mode data bus digital communications system A current mode data communication system is disclosed in which the system data bus is formed by an unshielded twisted wire pair (12). Coupled to the data bus by bus couplers (16) and bus-to-stub couplers (80) are current mode data stubs (82), which also a... | 01/14/1992 |
| 5073762 | Low frequency carrierband multi-port signal coupler A low frequency multi-port signal coupler employing hybrid transformer coupling circuitry for intercoupling from a main communication line to output taps. In one embodiment, the coupler has two tap ports interconnected by two core transformers, each havin... | 12/17/1991 |
| 5006822 | Hybrid RF coupling device with integrated capacitors and resistors An RF coupling device is formed on a hybrid printed circuit which avoids discrete capacitors or resistors. The substrate is formed of refractory dielectric sheet, such as alumina or another ceramic. A printed conductor is printed on the front surface of t... | 04/09/1991 |
