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Class Information
Number: 330/81
Name: Amplifiers > Signal feedback > At least one push-pull signal stage
Description: Subject matter including at least one stage of push-pull signal amplification.

Sub-classes under this class:

Class Number Class Name Patents
330/83 Including d.c. path for signal feedback 3
330/82 Positive and negative feedback 6

Patents under this class:

Patent Number Title Of Patent Date Issued
8446228 Oscillator circuit May. 21, 2013
8022776 Origami cascaded topology for analog and mixed-signal applications Sep. 20, 2011
6069503 High value FET resistors on a submicron MOS technology May. 30, 2000
5604461 Transformerless output vacuum tube audio amplifier Feb. 18, 1997
4321552 Amplifier comprising a first and a second amplifier element Mar. 23, 1982
4112386 Modular radio frequency amplifier having a gain variable by external passive component selection Sep. 5, 1978
4066975 Audio amplifier with improved stability Jan. 3, 1978

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