System and method for power amplifier output power control

Details System and method for power amplifier output power control System and method for power amplifier output power control

2007-01-18

2010-06-08

Pascal, Robert (Department: 2817)

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

C330S279000

Reexamination Certificate

active

07733176

ABSTRACT:
A system for controlling amplifier power is provided. The system includes a voltage envelope detector that receives a voltage signal and generates a voltage envelope signal. A current envelope detector receives a current signal and generates a current envelope signal. A power amplifier level controller receives the greater of the voltage envelope signal and the current envelope signal, such as by connecting the output of the voltage envelope detector and the current envelope detector at a common point and conducting the high frequency current components to ground via a capacitor. A power amplifier level control signal is then generated based on the voltage drop across the capacitor.

REFERENCES:
patent: 4165493 (1979-08-01), Harrington
patent: 6203516 (2001-03-01), Kepley
patent: 6917245 (2005-07-01), Dupuis et al.
patent: 2006/0066396 (2006-03-01), Brandt
patent: 0 458 071 (1997-11-01), None
Office Action issued in related U.S. Appl. No. 11/655,000 (now U.S. Patent No. 7,486,137) mailed May 16, 2008; 6 pgs.
Response to Office Action issued in related case (identified above) filed Aug. 14, 2008; 10 pgs.
Comments on Examiner's Reason for Allowance in related case (identified above) filed Dec. 18, 2008; 2 pgs.
International Search Report and Written Opinion from corresponding PCT/US2007/019473, dated Mar. 23, 2008 (12 pgs).

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