Including a push-pull stage > Coupling to or from cathode in push-pull > Patents

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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
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