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Class Information
Number: 330/119
Name: Amplifiers > Including a push-pull stage > Coupling to or from cathode in push-pull
Description: Subject matter wherein the two amplifying devices in push-pull are vacuum tube amplifying devices and wherein the input electrodes or the output electrodes are the cathode electrodes of the vacuum tube amplifying devices.

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
7173488 Vacuum tube power amplifier switchable between push-pull and single ended configurations Feb. 6, 2007
6937093 Cathode-coupled pentode valve amplifier with servo offset controlled push-pull output stage Aug. 30, 2005
6507240 Hybrid audio amplifier Jan. 14, 2003
6265938 Linear high-voltage drive stage and cathode-follower high-fidelity power amplifier implementing same Jul. 24, 2001
5859565 Cathode-follower high-fidelity power amplifier Jan. 12, 1999

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