Amplifiers – With control of power supply or bias voltage – With control of input electrode or gain control electrode bias
Patent
1993-08-10
1994-09-20
Mottola, Steven
Amplifiers
With control of power supply or bias voltage
With control of input electrode or gain control electrode bias
330124R, 330107, H03G 320
Patent
active
053493001
ABSTRACT:
A method and apparatus is provided for controlling peak envelope power level in a power amplifier (PA) (10). The method includes the steps of measuring (101) a first peak envelope power value of an input of the PA during a first time period, comparing (102) the first peak envelope power value with a threshold value, and introducing a phase change (103) into a selected signal of a plurality of signals being amplified by the PA when the first peak envelope power value exceeds the threshold. The method further includes measuring (104) a second peak envelope power value during a second time period, comparing (105) the first and second peak envelope power values, and reversing (106) the phase change to the selected signal when the second peak envelope power value exceeds the first peak envelope power value.
REFERENCES:
patent: 4718111 (1988-01-01), Jongsma
patent: 4811422 (1989-03-01), Kahn
Matz John E.
Mitzlaff James E.
Crilly Daniel C.
Motorola Inc.
Mottola Steven
Warren Raymond J.
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