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Class Information
Number: 330/68
Name: Amplifiers > Involving structure other than that of transformers per se > With shielding means
Description: Subject matter wherein the structure is some means for shielding at least part of the amplifier from external electric or magnetic fields, or such structure to protect parts of the device from undesired electric or magnetic fields originating in another part of the device, or such structure to prevent the amplifier or a part thereof from emanating undesired electric or magnetic fields.










Patents under this class:

Patent Number Title Of Patent Date Issued
8390382 Power amplifier circuit Mar. 5, 2013
8253486 Wireless apparatus having shielding function Aug. 28, 2012
7760017 Integrated circuit having on die structure providing capacitance in amplifier feedback path Jul. 20, 2010
7741915 Power amplification apparatus in communication system Jun. 22, 2010
7259625 High Q monolithic inductors for use in differential circuits Aug. 21, 2007
7133705 Portable power amplifier Nov. 7, 2006
7068521 Semiconductor device Jun. 27, 2006
6624703 Terminal arrangement for an electrical device Sep. 23, 2003
6624692 Radio frequency amplifier with a waveguide filter for isolating amplifying elements Sep. 23, 2003
6611170 Angular rate amplifier with noise shield technology Aug. 26, 2003
6473314 RF power amplifier assembly employing multi-layer RF blocking filter Oct. 29, 2002
6160453 High-frequency power amplifier Dec. 12, 2000
6144260 Amplifier Nov. 7, 2000
6133787 Method and apparatus for controlling the common mode impedance misbalance of an isolated single-ended circuit Oct. 17, 2000
6118672 Tuner structure and cable modem tuner using the same Sep. 12, 2000
6040739 Waveguide to microstrip backshort with external spring compression Mar. 21, 2000
6040741 Preamplifier for amplifying signal voltages from a signal source with high source impedance Mar. 21, 2000
6011700 Shielding case Jan. 4, 2000
5990736 High frequency amplifier with a guard circuit and a radio wave transmission apparatus including the same Nov. 23, 1999
5831476 Voltage-tuned millimeter-wave amplifier and method for tuning Nov. 3, 1998
5814761 Passive EMI dissipation apparatus and method Sep. 29, 1998
5412340 Shield structure for use in microwave circuit device May. 2, 1995
5352991 Power amplifier assembly Oct. 4, 1994
5274340 Microwave multistage amplifier Dec. 28, 1993
5087888 Light weight power amplifier assembled with no hand soldering or screws Feb. 11, 1992
5072193 Wire shielding for RF circuit boards and amplifiers Dec. 10, 1991
4963833 High powered amplifier and heat sinking apparatus Oct. 16, 1990
4751471 Amplifying circuit particularly adapted for amplifying a biopotential input signal Jun. 14, 1988
4695678 Electronic device carrier Sep. 22, 1987
4679002 Electromagnetically shielded narrow band electroencephalographic amplifier Jul. 7, 1987
4625178 Feedforward gain block with mirror image error amplifier Nov. 25, 1986
4585999 Radiofrequency amplifier based on a dc superconducting quantum interference device Apr. 29, 1986
4412183 AC Resistor attenuator and associated amplifier circuits Oct. 25, 1983
4051444 Amplifier structure for low-level voltage measurements Sep. 27, 1977











 
 
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