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Browse by Category: Main > Electrical & Energy
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:
1 2 3 4 5 6 7 8 9 10

Patent Number Title Of Patent Date Issued
6525611 Power amplifier protection Feb. 25, 2003
6525607 High-voltage differential input receiver Feb. 25, 2003
6522202 Current controlled power amplifier Feb. 18, 2003
6509797 Amplifier phase reversal suppression Jan. 21, 2003
6483386 Low voltage differential amplifier with high voltage protection Nov. 19, 2002
6469575 Circuit for amplifying and outputting audio signals Oct. 22, 2002
6459340 Power amplifier mismatch protection with clamping diodes in RF feedback circuit Oct. 1, 2002
6448857 Audio amplifier controller having soft start circuit protection and associated methods Sep. 10, 2002
6430403 Temperature compensated, zero bias RF detector circuit Aug. 6, 2002
6420935 Controller-based radio frequency amplifier module and method Jul. 16, 2002
6417732 Controller for RF power generator with reduced cable length sensitivity Jul. 9, 2002
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
6297694 High frequency power amplifier Oct. 2, 2001
6298223 Detector circuit and method of detecting antenna mismatch 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

1 2 3 4 5 6 7 8 9 10










 
 
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