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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 |
| 6407639 |
Radio frequency device including a power amplifier circuit and a stabilizer circuit, and mobile transceiver terminal including such a device |
Jun. 18, 2002 |
| 6405057 |
Method and apparatus for base transceiver station cold starts |
Jun. 11, 2002 |
| 6366766 |
Input protection circuit for a radio frequency |
Apr. 2, 2002 |
| 6362690 |
System and method for closed loop VSWR correction and tuning in RF power amplifiers |
Mar. 26, 2002 |
| 6329880 |
Radio frequency transmitting circuit |
Dec. 11, 2001 |
| 6300669 |
Semiconductor integrated circuit device and method of designing same |
Oct. 9, 2001 |
| 6300830 |
Multiplexed input envelope restoration scheme for linear high-efficiency power amplification |
Oct. 9, 2001 |
| 6298223 |
Detector circuit and method of detecting antenna mismatch |
Oct. 2, 2001 |
| 6297694 |
High frequency power amplifier |
Oct. 2, 2001 |
| 6278328 |
Power amplifier |
Aug. 21, 2001 |
| 6259324 |
Active bias network circuit for radio frequency amplifier |
Jul. 10, 2001 |
| 6252456 |
Power amplifier load controller and method for controlling a power amplifier load |
Jun. 26, 2001 |
| 6225867 |
Protection scheme for multi-transistor amplifiers |
May. 1, 2001 |
| 6225756 |
Power oscillator |
May. 1, 2001 |
| 6218900 |
Operational amplifier phase reversal protection |
Apr. 17, 2001 |
| 6198350 |
Signal amplifier with fast recovery time response, efficient output driver and DC offset cancellation capability |
Mar. 6, 2001 |
| 6198351 |
Power sensing apparatus for power amplifiers |
Mar. 6, 2001 |
| 6160455 |
Derived power supply for composite bridge amplifiers |
Dec. 12, 2000 |
| 6154092 |
Circuits for preventing unwanted output transients in amplifiers during power-up |
Nov. 28, 2000 |
| 6144259 |
Low-noise amplifier and circuit for controlling the same |
Nov. 7, 2000 |
| 6137366 |
High VSWR mismatch output stage |
Oct. 24, 2000 |
| 6108182 |
Overcurrent sensing circuit and self adjusting blanking |
Aug. 22, 2000 |
| 6097254 |
Output power amplifier circuit with short-circuit protective function |
Aug. 1, 2000 |
| 6064266 |
Load limiting circuit and method for limiting the output impedance seen by an amplifier |
May. 16, 2000 |
| 6043712 |
Linear power amplifier |
Mar. 28, 2000 |
| 6025754 |
Envelope modulated amplifier bias control and method |
Feb. 15, 2000 |
| 6014059 |
Power amplifier and method therein |
Jan. 11, 2000 |
| 6005440 |
Operational amplifier |
Dec. 21, 1999 |
| 5994958 |
Amplifier arrangement |
Nov. 30, 1999 |
| 5990750 |
Amplifier and driver system with multichannel operation |
Nov. 23, 1999 |
| 5986500 |
Combined linear power amplifying device and method |
Nov. 16, 1999 |
| 5973569 |
Short-circuit protection and over-current modulation to maximize audio amplifier output power |
Oct. 26, 1999 |
| 5955927 |
RF power transistor control using collector current |
Sep. 21, 1999 |
| 5945877 |
Power amplifier with bootstrap voltage clamp |
Aug. 31, 1999 |
| 5942945 |
Arrangement for protecting the output transistors in a power amplifier |
Aug. 24, 1999 |
| 5929709 |
Protective circuit |
Jul. 27, 1999 |
| 5917382 |
Sensor of the instant power dissipated in a power transistor |
Jun. 29, 1999 |
| 5892401 |
Solid state power amplifier with low distortion noise protection limiter |
Apr. 6, 1999 |
| 5877655 |
Device for limiting the output current of an operational amplifier |
Mar. 2, 1999 |
| 5859569 |
Current feedback differential amplifier clamp |
Jan. 12, 1999 |
| 5856760 |
Overdrive protection clamp scheme for feedback amplifiers |
Jan. 5, 1999 |
| 5847610 |
Protection circuit for an audio amplifier |
Dec. 8, 1998 |
| 5834978 |
Apparatus for protecting power amp module |
Nov. 10, 1998 |
| 5818301 |
Power amplifier arrangenment of a plural power supply switching type |
Oct. 6, 1998 |
| 5808514 |
Three state output method and apparatus for high speed amplifiers |
Sep. 15, 1998 |
| 5767744 |
Lightweight fixed frequency discontinuous resonant power supply for audio amplifiers |
Jun. 16, 1998 |
| 5745844 |
Receiver control in a communication device by antenna de-tuning in strong signal conditions, and method therefor |
Apr. 28, 1998 |
| 5739712 |
Power amplifying circuit having an over-current protective function |
Apr. 14, 1998 |
| 5696467 |
Method and apparatus for preventing overdrive of a semiconductor circuit |
Dec. 9, 1997 |
| 5673002 |
Operational amplifier having stable operations for a wide range of source voltage, and current detector circuit employing a small number of elements |
Sep. 30, 1997 |
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