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Class Information
Number: 330/202
Name: Amplifiers > With power or bias voltage supply > For anode
Description: Subject matter wherein the "source of electrical energy", biasing means, the circuit or means for supplying such electrical energy or bias voltage, or isolating means for such source or bias means supplies the anode of a vacuum tube amplifying device or isolates such supply for the anode from other parts of the amplifier.










Sub-classes under this class:

Class Number Class Name Patents
330/203 And input electrode 2


Patents under this class:

Patent Number Title Of Patent Date Issued
8660277 Amplifier circuit and methods of operation thereof Feb. 25, 2014
8311243 Energy-efficient consumer device audio power output stage Nov. 13, 2012
7288754 Optical receiver Oct. 30, 2007
6011440 Amplifier having output range that exceeds supply voltage Jan. 4, 2000
5909145 Variable control of electronic power supplies Jun. 1, 1999
5892404 Linear power amplifier with a pulse density modulated switching power supply Apr. 6, 1999
5751823 Audio amplifier system with improved isolation between preamplifier and power amplifier May. 12, 1998
5635872 Variable control of electronic power supplies Jun. 3, 1997
5568088 Waste energy control and management in power amplifier Oct. 22, 1996
5554959 Linear power amplifier with a pulse density modulated switching power supply Sep. 10, 1996
5396194 Audio frequency power amplifiers Mar. 7, 1995
5157353 Audio system with transient tracking dual voltage power supply Oct. 20, 1992
5091700 Amplifier with mains voltage reduction Feb. 25, 1992
5036292 Decoupled electrolytic capacitor Jul. 30, 1991
4819272 Intermittently driven transmitter Apr. 4, 1989
4742311 Circuit arrangement with a load connected to the output of an amplifier especially for NMR May. 3, 1988
4719431 Audio power amplifier Jan. 12, 1988
4651112 Audio amplifier system Mar. 17, 1987
4636741 Multi-level power amplifying circuitry for portable radio transceivers Jan. 13, 1987
4535303 Driver circuit Aug. 13, 1985
4449103 High power class B modulation amplifier for a broadcast transmitter May. 15, 1984
4442407 Two loop automatic level control for power amplifier Apr. 10, 1984
4320350 Sliding power supply for RF power amplifier Mar. 16, 1982
4213099 Hydrophone preamplifier and calibration circuit Jul. 15, 1980
4152661 Modulation amplifier May. 1, 1979
4117418 Electric amplifier Sep. 26, 1978
4115739 Power amplifier Sep. 19, 1978











 
 
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