Amplifiers – With semiconductor amplifying device – Including gain control means
Patent
1994-03-25
1995-01-31
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including gain control means
330140, 327306, 327309, 327317, H03G 708
Patent
active
053861990
ABSTRACT:
A compressor which is capable of compressing an input signal having an extremely large magnitude, without the signal being distorted and without the necessity of a additional circuit element such as an automatic level controller external thereto. The compressor includes a summing amplifier, a full-wave rectifier, an active limiter, and a gain controller. The summing amplifier compresses an input signal and produces a compressed output signal which is a compressed version of the input signal. The full-wave rectifier full-wave rectifies the compressed output signal and converts the rectified compressed output signal to a DC voltage output, and converts the DC voltage output to a first DC output. The active limiter compares the DC voltage output with a prescribed limit voltage, and is only enabled when the DC voltage output is greater than the limit voltage to produce a second DC output which is proportional to the difference between the DC voltage output and the limit voltage.
REFERENCES:
patent: 3550028 (1970-12-01), Dilley et al.
patent: 4754230 (1988-06-01), Schwartz et al.
patent: 5079517 (1992-01-01), Bader
Donohoe Charles R.
Mottola Steven
Samsung Electronics Co,. Ltd.
Westerlund Robert A.
Whitt Stephen R.
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