Amplifiers – With control of power supply or bias voltage – With control of input electrode or gain control electrode bias
Patent
1991-05-30
1992-08-11
Laroche, Eugene R.
Amplifiers
With control of power supply or bias voltage
With control of input electrode or gain control electrode bias
330289, 330285, H03G 330
Patent
active
051382741
ABSTRACT:
In a linear amplifier circuit, an amplifier amplifies an input signal to produce an output signal, an input signal envelope detector detects the envelope of the input signal, and an output signal envelope detector detects the envelope of the output signal. The difference between the outputs of the envelope detectors is determined, and the amplifier is controlled in accordance with the difference so that the level of the output signal is linearly related to the input signal. Compensation circuits are provided for temperature compensation of the linearity in the characteristic of the envelope detectors.
REFERENCES:
patent: 3486128 (1969-12-01), Lohrmann
patent: 4210874 (1980-07-01), Moskowitz
patent: 4574248 (1986-03-01), Snodgrass
patent: 4591800 (1986-05-01), Opas
Electronics Letters, Apr. 8, 1971, vol. 7, No. 7 pp. 145-146 "Linear Amplification Using Envelope Feedback".
Nakanishi Eiichi
Onodera Tetsuo
Dinh Tan
LaRoche Eugene R.
Manzo Edward D.
OKI Electric Industry Co., Ltd.
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