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Class Information
Number: 330/188
Name: Amplifiers > Input networks > Transformer coupled
Description: Subject matter in which the input circuit includes a transformer which couples the signal energy from the signal source to the amplifier device.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7557655 |
Systems and methods for isolating an analog signal |
Jul. 7, 2009 |
| 7446613 |
Power amplifier input structure having a differential output |
Nov. 4, 2008 |
| 7113045 |
Power amplifier input structure having a differential output |
Sep. 26, 2006 |
| 7005920 |
Programmable passive inductor |
Feb. 28, 2006 |
| 6737916 |
RF amplifier system having improved power supply |
May. 18, 2004 |
| 6603352 |
Switched-mode power amplifier integrally performing power combining |
Aug. 5, 2003 |
| 5838196 |
Transformer-coupled amplifier |
Nov. 17, 1998 |
| 5541482 |
Electrodeless discharge lamp including impedance matching and filter network |
Jul. 30, 1996 |
| 5264803 |
Amplifier circuit with increased voltage handling capacity |
Nov. 23, 1993 |
| 4968949 |
Ohmically isolating input circuit |
Nov. 6, 1990 |
| 4779058 |
Ohmically isolated input circuit |
Oct. 18, 1988 |
| 4531101 |
High-frequency amplifier with enhanced gain from use of the Miller effect capacitance |
Jul. 23, 1985 |
| 4379996 |
Enhancement of class C operation of bipolar junction transistor |
Apr. 12, 1983 |
| 4270061 |
Current transformer input system for AC conversion devices |
May. 26, 1981 |
| 4208633 |
Current supply branching arrangement for separation of signal and supply currents |
Jun. 17, 1980 |
| 4035738 |
Low noise amplifier |
Jul. 12, 1977 |
| 4005372 |
Frequency tunable microwave apparatus having a variable impedance hybrid idler circuit |
Jan. 25, 1977 |
| 3997852 |
RF amplifier |
Dec. 14, 1976 |
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