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Class Information
Number: 330/295
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including plural amplifier channels
Description: Subject matter having more than one signal transmission path, each of which contains an amplifier (e.g., plural inputs or plural outputs).


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Patent Number Title Of Patent Date Issued
7616061 Low noise amplifier for ultra wide band Nov. 10, 2009
7612612 Calibration circuitry and delay cells in rectilinear RF power amplifier Nov. 3, 2009
7602241 Multiband Doherty amplifier Oct. 13, 2009
7598809 RF power amplifier Oct. 6, 2009
7598810 Power amplifier having input ends combined in series and output ends combined in series Oct. 6, 2009
7598804 Amplifier circuit Oct. 6, 2009
7595688 High power commutating multiple output amplifier system Sep. 29, 2009
7589593 Amplifier circuit having stacked main amplifier and parallel sub-amplifier Sep. 15, 2009
7586374 Wireless communication unit, integrated circuit and biasing therefor Sep. 8, 2009
7586375 Active circuit having improved linearity using multiple gated transistor Sep. 8, 2009
7579913 Low power comsumption, low noise and high power gain distributed amplifiers for communication systems Aug. 25, 2009
7576611 Systems and methods for high frequency electronic power conversion and amplification Aug. 18, 2009
7570111 Apparatus and method for wideband amplification of RF signals Aug. 4, 2009
7570932 Dual mode quadrature radio frequency power amplifier Aug. 4, 2009
7560983 Multiple-path power amplifier Jul. 14, 2009
7560989 Power amplifier with controlled output power Jul. 14, 2009
7548118 Semiconductor device and power amplifier Jun. 16, 2009
7541866 Enhanced doherty amplifier with asymmetrical semiconductors Jun. 2, 2009
7539269 Method and apparatus for discrete power synthesis of multicarrier signals with constant envelope power amplifiers May. 26, 2009
7535304 Amplifier coupling on a reduced area May. 19, 2009
7532073 Solid state power amplifier with multi-planar MMIC modules May. 12, 2009
7526261 RF power transmission, modulation, and amplification, including cartesian 4-branch embodiments Apr. 28, 2009
7526260 Apparatus, methods and articles of manufacture for linear signal modification Apr. 28, 2009
7525386 Active circuit having improved linearity using multiple gated transistor Apr. 28, 2009
7525385 Common drain driven cascode enhancement mode traveling wave amplifier Apr. 28, 2009
7522672 Digital branch calibrator for an RF transmitter Apr. 21, 2009
7521995 Inverted doherty amplifier with increased off-state impedence Apr. 21, 2009
7514995 Standby and concurring system of a power amplifier and method for power amplifying Apr. 7, 2009
7511575 High-frequency power amplifier Mar. 31, 2009
7508268 Power amplifier and transmission and reception system Mar. 24, 2009
7498883 Distributed amplifier with built-in filtering functions Mar. 3, 2009
7498878 Multi-path doherty amplifier and control method of a multi-path doherty amplifier Mar. 3, 2009
7489197 Coupling net and MMIC amplifier Feb. 10, 2009
7486135 Configurable, variable gain LNA for multi-band RF receiver Feb. 3, 2009
7486133 Transmitting output stage with adjustable output power and process for amplifying a signal in a transmitting output stage Feb. 3, 2009
7486136 Power amplifier Feb. 3, 2009
7486141 Wide bandwidth, high power amplifier Feb. 3, 2009
7482894 Radial power divider/combiner using waveguide impedance transformers Jan. 27, 2009
7477105 Amplifier arrangement and method for amplifying a signal Jan. 13, 2009
7477108 Thermally distributed integrated power amplifier module Jan. 13, 2009
7474156 Impedance transformer for amplifier and amplifier including the same Jan. 6, 2009
7474155 Power amplifier Jan. 6, 2009
7471154 Bias circuit for maintaining high linearity at cutback power conditions Dec. 30, 2008
7471153 Multi-primary distributed active transformer amplifier power supply and control Dec. 30, 2008
7466203 Solid state microwave power amplifier Dec. 16, 2008
7459974 System and method for distortion cancellation in amplifiers Dec. 2, 2008
7457592 Polar modulation transmission apparatus and wireless communication apparatus Nov. 25, 2008
7456692 Gain variable amplifier Nov. 25, 2008
7456687 Amplifier unit and method of detecting failure in the same Nov. 25, 2008
7453320 Amplifier Nov. 18, 2008

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