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Class Information
Number: 330/128
Name: Amplifiers > With control of power supply or bias voltage > Control means for anode of screen grid circuit
Description: Subject matter wherein the "combined control means" is in the circuit from the power supply or bias voltage source means to the anode or screen grid electrode of a vacuum tube amplifying device or in shunt therewith, in such manner, as to control the power supply or bias voltage applied to the anode or screen grid electrode.

Patents under this class:

Patent Number Title Of Patent Date Issued
6961553 Bidirectional distributed amplifier Nov. 1, 2005
6947567 Audio boost circuit Sep. 20, 2005
6927626 Thermal protection system for an output stage of an amplifier Aug. 9, 2005
6489843 Power amplifier and communication unit Dec. 3, 2002
5909145 Variable control of electronic power supplies Jun. 1, 1999
5635872 Variable control of electronic power supplies Jun. 3, 1997
5091700 Amplifier with mains voltage reduction Feb. 25, 1992
4442407 Two loop automatic level control for power amplifier Apr. 10, 1984
4441086 Audio system with orderly shutdown sequence Apr. 3, 1984
4286492 Control for electronic amplifiers Sep. 1, 1981
4277755 Circuit arrangement for driving nonlinear threshold devices Jul. 7, 1981
4196392 Method and apparatus for monitoring and controlling the anode dissipation of transmitters Apr. 1, 1980
4053848 Circuit arrangement for combining high frequency power components Oct. 11, 1977

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