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Class Information
Number: 330/276
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including push-pull amplifier > Having transformer
Description: Subject matter wherein a transformer is included in the circuit.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8680924 Differential power amplifiers with push-pull power amplifiers and even-harmonic cancellation Mar. 25, 2014
8536948 Power amplifier Sep. 17, 2013
8514022 RF power amplifier Aug. 20, 2013
8466742 Large time constant steering circuit and instrumentation amplifier implementing same Jun. 18, 2013
8461927 Power amplification circuit having transformer Jun. 11, 2013
8374196 Methods and apparatus for a switchable balun for combined Bluetooth.RTM. and WLAN operation Feb. 12, 2013
8350625 Adaptive power amplifier Jan. 8, 2013
8330544 Power amplification circuit having transformer Dec. 11, 2012
8330545 RF power amplifier Dec. 11, 2012
8319556 Transformer coupled distributed amplifier Nov. 27, 2012
8237503 Output stage for a digital RF transmitter, method for providing an RF output signal in a digital RF transmitter, and digital RF transmitter Aug. 7, 2012
8164387 Simultaneous harmonic termination in a push-pull power amplifier Apr. 24, 2012
8154344 RF power amplifier Apr. 10, 2012
8134408 Power amplification circuit having transformer Mar. 13, 2012
8130039 Solid-state RF power amplifier for radio transmitters Mar. 6, 2012
8098095 Power amplifier Jan. 17, 2012
8049563 Distributed circular geometry power amplifier architecture Nov. 1, 2011
8049564 Distributed active transformer amplifier with differential power combiner Nov. 1, 2011
8031003 Solid-state RF power amplifier for radio transmitters Oct. 4, 2011
8022776 Origami cascaded topology for analog and mixed-signal applications Sep. 20, 2011
8022762 Multi-stage CMOS power amplifier Sep. 20, 2011
8018283 Reconfigurable distributed active transformers Sep. 13, 2011
7990220 RF power amplifier Aug. 2, 2011
7915960 Multi-primary distributed active transformer amplifier power supply and control Mar. 29, 2011
7898340 Method and system for amplifying a signal using a transformer matched transistor Mar. 1, 2011
7889009 Distributed active transformer based millimeter-wave power amplifier circuit Feb. 15, 2011
7876162 Amplifier and radio Jan. 25, 2011
7863986 Techniques for improving balun loaded-Q Jan. 4, 2011
7777570 Transformer power combiner having secondary winding conductors magnetically coupled to primary winding conductors and configured in topology including series connection and parallel connection Aug. 17, 2010
7768350 Output gain stage for a power amplifier Aug. 3, 2010
7760025 Multi-primary distributed active transformer amplifier power supply and control Jul. 20, 2010
7733183 Reconfigurable distributed active transformers Jun. 8, 2010
7724083 Method and apparatus for Josephson distributed output amplifier May. 25, 2010
7683718 Solid-state RF power amplifier for radio transmitters Mar. 23, 2010
7508260 Bypassable low noise amplifier topology with multi-tap transformer Mar. 24, 2009
7504883 Amplifier device including an operational amplifier, transformer and feedback loop Mar. 17, 2009
7486141 Wide bandwidth, high power amplifier Feb. 3, 2009
7471156 Amplifier containing programmable impedance for harmonic termination Dec. 30, 2008
7471153 Multi-primary distributed active transformer amplifier power supply and control Dec. 30, 2008
7432793 Amplifier output filter having planar inductor Oct. 7, 2008
7425869 Distributed circular geometry power amplifier architecture Sep. 16, 2008
7372336 Small-sized on-chip CMOS power amplifier having improved efficiency May. 13, 2008
7358815 Monolithic transformer based amplifier for integrated circuits Apr. 15, 2008
7330076 Reconfigurable distributed active transformers Feb. 12, 2008
7321752 Linear amplification arrangement with non-linear amplifier element for a mobile radio device Jan. 22, 2008
7301400 Multi-phase switching power supply for mobile telephone applications Nov. 27, 2007
7260377 Variable-gain low noise amplifier for digital terrestrial applications Aug. 21, 2007
7230488 Amplifying circuit, noise reducing apparatus and power converting apparatus Jun. 12, 2007
7173488 Vacuum tube power amplifier switchable between push-pull and single ended configurations Feb. 6, 2007
7119619 Reconfigurable distributed active transformers Oct. 10, 2006

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