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Class Information
Number: 330/188
Name: Amplifiers > Input networks > Transformer coupled
Description: Subject matter in which the input circuit includes a transformer which couples the signal energy from the signal source to the amplifier device.










Sub-classes under this class:

Class Number Class Name Patents
330/189 With additional impedance connected to "p" or "s" circuits 8
330/190 With transformer structure 9


Patents under this class:

Patent Number Title Of Patent Date Issued
8610506 Amplifier circuit Dec. 17, 2013
8508301 Three dimensional inductor, transformer and radio frequency amplifier Aug. 13, 2013
8446217 Dual-loop feedback amplifying circuit May. 21, 2013
8149053 Low noise amplifier Apr. 3, 2012
8102207 Apparatus and method for broadband amplifier linearization Jan. 24, 2012
8044540 Systems and methods for a SPDT switch or SPMT switch with transformer Oct. 25, 2011
7973603 Low-noise amplifier suitable for use in a television receiver Jul. 5, 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
7633344 Low noise amplifier and differential amplifier Dec. 15, 2009
7557655 Systems and methods for isolating an analog signal Jul. 7, 2009
7446613 Power amplifier input structure having a differential output Nov. 4, 2008
7113045 Power amplifier input structure having a differential output Sep. 26, 2006
7005920 Programmable passive inductor Feb. 28, 2006
6737916 RF amplifier system having improved power supply May. 18, 2004
6603352 Switched-mode power amplifier integrally performing power combining Aug. 5, 2003
5838196 Transformer-coupled amplifier Nov. 17, 1998
5541482 Electrodeless discharge lamp including impedance matching and filter network Jul. 30, 1996
5264803 Amplifier circuit with increased voltage handling capacity Nov. 23, 1993
4968949 Ohmically isolating input circuit Nov. 6, 1990
4779058 Ohmically isolated input circuit Oct. 18, 1988
4531101 High-frequency amplifier with enhanced gain from use of the Miller effect capacitance Jul. 23, 1985
4379996 Enhancement of class C operation of bipolar junction transistor Apr. 12, 1983
4270061 Current transformer input system for AC conversion devices May. 26, 1981
4208633 Current supply branching arrangement for separation of signal and supply currents Jun. 17, 1980
4035738 Low noise amplifier Jul. 12, 1977
4005372 Frequency tunable microwave apparatus having a variable impedance hybrid idler circuit Jan. 25, 1977
3997852 RF amplifier Dec. 14, 1976











 
 
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