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Class Information
Number: 330/290
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including d.c. feedback bias control for stabilization
Description: Subject matter with feedback circuit for direct currents, for the purpose of operating point stabilization as compensating for changes in temperature, aging, etc., of the semiconductor device, or devices, which may include means such as bypass capacitors to eliminate signal feedback.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7425871 |
Compensation units for reducing the effects of self-heating and increasing linear performance in bipolar transistors |
Sep. 16, 2008 |
| 7405623 |
Sensing circuit |
Jul. 29, 2008 |
| 7391264 |
Amplifier |
Jun. 24, 2008 |
| 7330075 |
Output impedance control circuit and control method thereof |
Feb. 12, 2008 |
| 7304540 |
Source follower and current feedback circuit thereof |
Dec. 4, 2007 |
| 7262665 |
Active bias circuit for low-noise amplifiers |
Aug. 28, 2007 |
| 7233199 |
Circuit and method of establishing DC bias levels in an RF power amplifier |
Jun. 19, 2007 |
| 7224230 |
Bias circuit with mode control and compensation for voltage and temperature |
May. 29, 2007 |
| 7218175 |
Dynamic feedback linearization |
May. 15, 2007 |
| 7202743 |
High frequency amplifier |
Apr. 10, 2007 |
| 7113043 |
Active bias circuit for low-noise amplifiers |
Sep. 26, 2006 |
| 7078967 |
Control of bias voltage |
Jul. 18, 2006 |
| 7061321 |
Low impedance read amplifier for magnetoresistive head |
Jun. 13, 2006 |
| 7058360 |
Method and system for stabilizing the performance variation of a radio frequency device |
Jun. 6, 2006 |
| 7049893 |
Apparatus, methods and articles of manufacture for power amplifier control in a communication system |
May. 23, 2006 |
| 7039124 |
Apparatus and method for compensating for analog quadrature modulation error |
May. 2, 2006 |
| 6933785 |
Common mode bias control loop for output stages |
Aug. 23, 2005 |
| 6825725 |
Integrated power amplifier circuit |
Nov. 30, 2004 |
| 6778019 |
Method and device for biasing a transistor of a radio frequency amplifier stage |
Aug. 17, 2004 |
| 6774724 |
Radio frequency power amplifier active self-bias compensation circuit |
Aug. 10, 2004 |
| 6771122 |
DC offset compensation circuit of closed loop operational amplifier and method of compensating for DC offset |
Aug. 3, 2004 |
| 6762643 |
High duty cycle offset compensation for operational amplifiers |
Jul. 13, 2004 |
| 6741134 |
DC feedback control circuit |
May. 25, 2004 |
| 6690237 |
High frequency power amplifier, and communication apparatus |
Feb. 10, 2004 |
| 6605994 |
Stabilized high band width differential emitter follower amplifier |
Aug. 12, 2003 |
| 6573796 |
Automatic LDMOS biasing with long term hot carrier compensation |
Jun. 3, 2003 |
| 6566958 |
Low power systems using enhanced bias control in rail-to-rail gain stage amplifiers |
May. 20, 2003 |
| 6545541 |
Power amplifier embedded cell bias detection, methods of detecting bias in power amplifiers and systems utilizing embedded cell bias detection |
Apr. 8, 2003 |
| 6535059 |
Amplifier circuit |
Mar. 18, 2003 |
| 6509722 |
Dynamic input stage biasing for low quiescent current amplifiers |
Jan. 21, 2003 |
| 6434243 |
Power amplifier |
Aug. 13, 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 |
| 6404286 |
Electrical arrangement having improved feedback stability |
Jun. 11, 2002 |
| 6268772 |
Slew rate controlled power amplifier |
Jul. 31, 2001 |
| 6262631 |
Silicon power bipolar junction transistor with an integrated linearizer |
Jul. 17, 2001 |
| 6218906 |
Amplifier circuit |
Apr. 17, 2001 |
| 6191656 |
High efficiency, unilateral dual stage RF amplifier |
Feb. 20, 2001 |
| 6134424 |
High-frequency power amplifier and mobile communication device using same |
Oct. 17, 2000 |
| 6130582 |
Amplifier circuit including compensation circuitry for canceling variations in an amplifier feedback signal |
Oct. 10, 2000 |
| 6114909 |
Differential amplifier for correcting offsets at inputs using low capacitance capacitor |
Sep. 5, 2000 |
| 6107867 |
Load termination sensing circuit |
Aug. 22, 2000 |
| 6091302 |
Electronic circuit biasing control system |
Jul. 18, 2000 |
| 6052029 |
Stabilizing circuit and amplifier |
Apr. 18, 2000 |
| 6046642 |
Amplifier with active bias compensation and method for adjusting quiescent current |
Apr. 4, 2000 |
| 6034569 |
Amplifier offset cancellation system |
Mar. 7, 2000 |
| 6023196 |
Bias circuit for transconductance amplifier |
Feb. 8, 2000 |
| 6011439 |
Low power RF amplifier |
Jan. 4, 2000 |
| 5986840 |
Amplifier with capacitive feedback for driving a magneto-resistive head |
Nov. 16, 1999 |
| 5986508 |
Bias concept for intrinsic gain stabilization over temperature |
Nov. 16, 1999 |
| 5986509 |
Transistor amplifier stage |
Nov. 16, 1999 |
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