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Class Information
Number: 330/65
Name: Amplifiers > Involving structure other than that of transformers per se
Description: Subject matter involving the structure of any amplifier circuit element, such as resistors, vacuum tubes, etc., with the exception of the structure of transformer elements, or of the structural relationships of such elements in the amplifier.










Sub-classes under this class:

Class Number Class Name Patents
330/67 With capacitive structure 17
330/66 With printed circuits 76
330/68 With shielding means 34


Patents under this class:

Patent Number Title Of Patent Date Issued
7297055 Vacuum-insulating system and method for generating a high-level vacuum Nov. 20, 2007
6724250 Transformer of power-amplifier module for an audio device Apr. 20, 2004
6614311 Micro-wave power amplifier Sep. 2, 2003
6518844 Suspended transmission line with embedded amplifier Feb. 11, 2003
6396342 Microwave amplifier generating distortion-reduced high output microwave power May. 28, 2002
6388892 Tuner unit May. 14, 2002
6300827 Method and apparatus for cascaded ground return amplifier Oct. 9, 2001
6259901 Radio-frequency power amplifier of mobile communication equipment Jul. 10, 2001
5726605 Silicon carbide RF power module Mar. 10, 1998
5719526 Internal load monitor for amplifier Feb. 17, 1998
5663683 Mist cooled distributed amplifier utilizing a connectorless module Sep. 2, 1997
5652544 Apparatus and method for programming an amplifier Jul. 29, 1997
5491449 Dual-sided push-pull amplifier Feb. 13, 1996
5352991 Power amplifier assembly Oct. 4, 1994
5208554 High power compact microwave amplifier May. 4, 1993
5130891 Docking amplifier housing assembly Jul. 14, 1992
5087888 Light weight power amplifier assembled with no hand soldering or screws Feb. 11, 1992
4963833 High powered amplifier and heat sinking apparatus Oct. 16, 1990
4901029 Solid-state high power amplifier arrangement Feb. 13, 1990
4864245 Modification unit for an amplifier Sep. 5, 1989
4751471 Amplifying circuit particularly adapted for amplifying a biopotential input signal Jun. 14, 1988
4565931 Isolated amplifier circuit for amplifying pulses, in particular for a high voltage output Jan. 21, 1986
4471314 Hybrid pulse width modulated audio amplifier Sep. 11, 1984
4342002 Modular electronic systems Jul. 27, 1982
4223272 Four-terminal network of adjustable transfer function Sep. 16, 1980
4214214 Connecting cable Jul. 22, 1980
4151479 Low frequency power amplifier using MOS FET's Apr. 24, 1979
4134077 Amplifier circuit operable over a wide temperature range Jan. 9, 1979
4124877 Amplifier with digital control Nov. 7, 1978
4059810 Resin-encased microelectronic module Nov. 22, 1977
4055809 Amplifying device Oct. 25, 1977
3940666 Circuit module with recess for receiving a coupling coil Feb. 24, 1976











 
 
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