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Class Information
Number: 333/172
Name: Wave transmission lines and networks > Coupling networks > Frequency domain filters utilizing only lumped parameters > Rc or rl type
Description: Subject matter wherein the filter parameters are limited to combinations of resistance and capacitance or to combinations of resistance and inductance.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8653903 Passive amplifier Feb. 18, 2014
8653909 Apparatus for wireless power transmission using high Q low frequency near magnetic field resonator Feb. 18, 2014
8610477 Wideband analog phase shifter Dec. 17, 2013
8461012 Device with ground plane for high frequency signal transmission and method therefor Jun. 11, 2013
8432235 Coupler and communication system Apr. 30, 2013
8428545 Filter circuitry Apr. 23, 2013
8412141 LR polyphase filter Apr. 2, 2013
8395461 Mode switching RC network Mar. 12, 2013
8340616 Tracking filter for tuner Dec. 25, 2012
8264301 Modeling circuit of high-frequency device and modeling method thereof Sep. 11, 2012
8253512 Printed circuit board Aug. 28, 2012
8237519 Filter design methods and filters based on metamaterial structures Aug. 7, 2012
8225113 Computer system with resistor-capacitor filter circuit Jul. 17, 2012
8159312 Method and system for signal coupling and direct current blocking Apr. 17, 2012
8154362 Constant impedance filter Apr. 10, 2012
8144480 Multi-layer embedded capacitance and resistance substrate core Mar. 27, 2012
8134423 Noise filter and noise-filter-incorporated amplifier circuit Mar. 13, 2012
8115571 Harmonic filter Feb. 14, 2012
8085100 Poly-phase frequency synthesis oscillator Dec. 27, 2011
8058949 Compact RC notch filter for quadrature and differential signaling Nov. 15, 2011
8054144 Mode switching RC network Nov. 8, 2011
8022575 Damping electromagnetic oscillations in power systems Sep. 20, 2011
8018300 Band rejection filter capable of reducing harmonics and related satellite signal receiver Sep. 13, 2011
8013684 Radio frequency noise and interference suppression in an integrated circuit Sep. 6, 2011
7994876 Lightweight electromagnetic interference filter Aug. 9, 2011
7961065 Noise filter Jun. 14, 2011
7889020 Asymmetrical filter Feb. 15, 2011
7856220 Magneto-electric-induction conversion system of wireless input device Dec. 21, 2010
7825750 EMI filter for controlling cutoff frequency Nov. 2, 2010
7821352 Ultra-wideband, directional coupler and method of implementation Oct. 26, 2010
7786824 Multilayer filter Aug. 31, 2010
7772938 Electrical multiple-wire system for push-pull signal transmission with an attenuating or filtering element and data transmission bus Aug. 10, 2010
7728695 Multilayer filter having an inductor portion and a varistor portion stacked with an intermediate portion Jun. 1, 2010
7719380 AC coupling circuit May. 18, 2010
7719387 Multilayer filter composed of varistor section and inductor section May. 18, 2010
7683739 Signal filter assembly with impedance-adjusting characteristic Mar. 23, 2010
7649407 Digitally tuned, integrated RF filters with enhanced linearity for multi-band radio applications Jan. 19, 2010
7633358 Phase shifter circuit with proper broadband performance Dec. 15, 2009
7567151 Multilayer filter Jul. 28, 2009
7538633 Method and apparatus for driving on-chip wires through capacitive coupling May. 26, 2009
7501915 High frequency module Mar. 10, 2009
7501914 Bias circuit Mar. 10, 2009
7459995 Noise suppression circuit Dec. 2, 2008
7443267 Low-pass filter and low-pass filter array Oct. 28, 2008
7432784 Noise filter and mounted structure of noise filter Oct. 7, 2008
7424276 Transmitter and wireless communication apparatus using the transmitter Sep. 9, 2008
7423500 Low-pass filter capable of preventing unnecessary electromagnetic coupling Sep. 9, 2008
7405636 Passive polyphase filter Jul. 29, 2008
7332976 Poly-phase frequency synthesis oscillator Feb. 19, 2008
7327035 System and method for providing a low frequency filter pole Feb. 5, 2008

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