Modulators – Phase shift keying modulator or quadrature amplitude modulator
Patent
1990-08-03
1991-06-04
Mottola, Steven
Modulators
Phase shift keying modulator or quadrature amplitude modulator
332123, 455126, H03C 308, H04B 104
Patent
active
050217534
ABSTRACT:
An amplifier circuit uses a microprocessor to count occurrences of the output stage going into saturation to decide when to control input levels to the amplifier. When the output amplifier stage saturates too frequently, the microprocessor controls a scaling line that effectively attenuates input levels to the amplifier, eliminating saturation levels. When the output stage saturates too infrequently, input levels to the amplifier are increased.
REFERENCES:
patent: 4618999 (1986-10-01), Watkinson
patent: 4700151 (1987-10-01), Nagata
patent: 4843351 (1989-06-01), Edwards et al.
patent: 4933986 (1990-06-01), Leitch
Krause Joseph P.
Motorola Inc.
Mottola Steven
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