Title:
POWER AMPLIFIER SATURATION DETECTION AND COMPENSATION
Document Type and Number:
WIPO Patent Application WO2002019517
Kind Code:
A3
Abstract:
A system for detecting and compensating for a saturation condition of a power amplifier where an error signal is produced by differencing a signal representative of or derived from a control signal for controlling the shape of the output of the power amplifier and a signal representative of or derived from the output of the power amplifier. An integrator integrates the error signal to produce a cumulative error signal. A detection circuit detects a saturation condition when the value of the cumulative error equals or exceeds a predetermined value determined during device calibration. Upon the detection of a saturation condition, a compensation circuit derives a compensation value by multiplying the value of the error signal at the time saturation is detected by a predetermined constant, and subtracts this value from the control signal. The input to the power amplifier is derived from the adjusted control signal.
Inventors:
KOMAILI JALEH
CLARK RICKE W
CLARK RICKE W
Application Number:
PCT/US2001/026823
Publication Date:
June 12, 2003
Filing Date:
August 30, 2001
Export Citation:
Assignee:
SKYWORKS SOLUTIONS INC (US)
International Classes:
H03F1/32; H03F1/34; (IPC1-7): H03F1/32; H03G3/30
Foreign References:
| US5150075A | 1992-09-22 | |||
| US5448770A | 1995-09-05 | |||
| US6020787A | 2000-02-01 | |||
| US5655220A | 1997-08-05 | |||
| EP0414352A2 | 1991-02-27 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 015, no. 419 (E - 1126) 24 October 1991 (1991-10-24)
Download PDF: