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Class Information
Number: 330/171
Name: Amplifiers > Interstage coupling > Transformer coupling > With transformer structure
Description: Subject matter involving the structure of the transformer coupling the signal between the two cascaded stages.

Patents under this class:

Patent Number Title Of Patent Date Issued
8280325 Configurable transmitter Oct. 2, 2012
8022776 Origami cascaded topology for analog and mixed-signal applications Sep. 20, 2011
RE42449 Piezo-electric tag Jun. 14, 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
7554396 Power amplifier circuit for peak envelope modulation of high frequency signal Jun. 30, 2009
7348845 System and method for employing variable magnetic flux bias in an amplifier Mar. 25, 2008
6894616 Piezo-electric tag May. 17, 2005
5710520 Pulse step modulator and transformer Jan. 20, 1998
5164682 Two-port wideband bipolar transistor amplifiers Nov. 17, 1992
4571554 Balanced amplifier device Feb. 18, 1986
4565931 Isolated amplifier circuit for amplifying pulses, in particular for a high voltage output Jan. 21, 1986
4490844 Low frequency transformer Dec. 25, 1984
4124822 Isolation amplifier Nov. 7, 1978

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