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Class Information
Number: 330/298
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including protection means
Description: Subject matter including circuits or devices for protecting the amplifying means.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7459979 |
Semiconductor indicator for voltage diagnostics in power amplifiers |
Dec. 2, 2008 |
| 7449959 |
Methods and apparatus to detect impedance at an amplifier output |
Nov. 11, 2008 |
| 7432766 |
Front end for an instrumentation amplifier |
Oct. 7, 2008 |
| 7423491 |
Semiconductor amplifier |
Sep. 9, 2008 |
| 7391267 |
Output circuit |
Jun. 24, 2008 |
| 7375589 |
Power amplifier system provided with improved protection function |
May. 20, 2008 |
| 7362871 |
Audio amplifier circuit and audio IC having the same |
Apr. 22, 2008 |
| 7362181 |
Procedure for operating a high frequency amplifier |
Apr. 22, 2008 |
| 7362180 |
Protection circuit of digital amplifier |
Apr. 22, 2008 |
| 7355476 |
Input stage for an amplifier |
Apr. 8, 2008 |
| 7352240 |
Method and apparatus for protecting devices in an RF power amplifier |
Apr. 1, 2008 |
| 7348854 |
Automatic biasing and protection circuit for field effect transistor (FET) devices |
Mar. 25, 2008 |
| 7339424 |
Apparatus and method for controlling temperature of electronic apparatus |
Mar. 4, 2008 |
| 7332969 |
Output offset protection for power amplifier |
Feb. 19, 2008 |
| 7327187 |
Method, circuit and power amplifier for detecting a fault, and method of protecting a circuit in a power amplifier from a fault occurrence |
Feb. 5, 2008 |
| 7307478 |
Adjustable power amplifier and applications thereof |
Dec. 11, 2007 |
| 7301402 |
Soft saturation detection for power amplifiers |
Nov. 27, 2007 |
| 7286010 |
Systems and methods for over-current protection |
Oct. 23, 2007 |
| 7276968 |
Class D amplifier |
Oct. 2, 2007 |
| 7276974 |
Method and apparatus for protecting RF power amplifiers |
Oct. 2, 2007 |
| 7268990 |
Power amplifier protection |
Sep. 11, 2007 |
| 7262667 |
Radio frequency power amplifier |
Aug. 28, 2007 |
| 7262668 |
Semiconductor amplifier |
Aug. 28, 2007 |
| 7256652 |
Differential input receiver having over-voltage protection |
Aug. 14, 2007 |
| 7253687 |
Clamping circuit for operational amplifiers |
Aug. 7, 2007 |
| 7221227 |
Methods and apparatus for reducing output current oscillations of a driver provided with circuitry that senses and responds to excessive current draws of an output stage of the driver |
May. 22, 2007 |
| 7205834 |
Power amplifier |
Apr. 17, 2007 |
| 7205840 |
Wideband CMOS gain stage |
Apr. 17, 2007 |
| 7205843 |
Protection circuit for power amplifier |
Apr. 17, 2007 |
| 7202749 |
AC coupling technique for improved noise performance and simple biasing |
Apr. 10, 2007 |
| 7196585 |
Fast-response current limiting |
Mar. 27, 2007 |
| 7196586 |
Oscillator amplifier circuit operable to provide symmetric current limiting and method of same |
Mar. 27, 2007 |
| 7193474 |
Current limit circuit for power amplifiers |
Mar. 20, 2007 |
| 7190934 |
Reflected power suppression circuit |
Mar. 13, 2007 |
| 7167055 |
Voltage level detector for power amplifier protection control |
Jan. 23, 2007 |
| 7164320 |
Current threshold circuit |
Jan. 16, 2007 |
| 7161990 |
Predistortion amplifier |
Jan. 9, 2007 |
| 7158633 |
Method and apparatus for monitoring subscriber loop interface circuitry power dissipation |
Jan. 2, 2007 |
| 7157968 |
Method and apparatus for protecting a switching amplifier from excess current |
Jan. 2, 2007 |
| 7145396 |
Method and apparatus for protecting devices in an RF power amplifier |
Dec. 5, 2006 |
| 7145397 |
Output overvoltage protection circuit for power amplifier |
Dec. 5, 2006 |
| 7136774 |
Sense amplifier thermal correction scheme |
Nov. 14, 2006 |
| 7132886 |
Detecting load current in multi-reference amplifiers |
Nov. 7, 2006 |
| 7113042 |
Low noise op amp |
Sep. 26, 2006 |
| 7109801 |
Low gate oxide stress power amplifier |
Sep. 19, 2006 |
| 7102445 |
Power amplifier module |
Sep. 5, 2006 |
| 7075373 |
Overcurrent protection circuit with fast current limiting control |
Jul. 11, 2006 |
| 7043033 |
Mode control for audio amplifier coupling |
May. 9, 2006 |
| 7034610 |
Apparatus, system, and method for amplifying a signal, and applications thereof |
Apr. 25, 2006 |
| 7030700 |
Voltage level detector for power amplifier protection control |
Apr. 18, 2006 |
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