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Class Information
Number: 330/120
Name: Amplifiers > Including a push-pull stage > Interstage coupling between push-pull
Description: Subject matter including at least two cascaded stages of amplification, each stages as defined in subclass 118 above and each stage excepting the first having its signal input coupled to the signal output of the preceding stage involving specific details or distinctive characteristics of the coupling between the stages.

Sub-classes under this class:

Class Number Class Name Patents
330/121 D.c. coupling 3

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
6636117 Input/output buffer incorporating filter for powerline communications line Oct. 21, 2003
5382915 Pulsewidth-modulated amplifier having analog mode Jan. 17, 1995
4644289 Variable power amplifier for audio frequency signals and method Feb. 17, 1987

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