Wide band transmission system with biasing of gain control circu

Details Wide band transmission system with biasing of gain control circu Wide band transmission system with biasing of gain control circu

1988-12-21

1991-01-22

Strecker, Gerard R.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455191, 455200, 455247, H04B 116

Patent

active

049876066

ABSTRACT:
There is provided a wide band transmission system which, by using two or more filters and gain control circuits, is operated so as to determine the gain control amount of the gain control circuits according to an intensity and frequency band of a signal which is desired to be received. Further, a bias circuit increases the attenuation amount of the gain control circuit connected to the filter whose pass band is out of the band of the desired signal.

REFERENCES:
patent: 2275389 (1942-03-01), Feldman
patent: 3005094 (1961-10-01), Taylor
patent: 4048598 (1977-09-01), Knight
patent: 4403346 (1983-09-01), Ogawa
patent: 4418427 (1983-11-01), Muterspaugh
patent: 4619000 (1986-10-01), Ma
patent: 4792993 (1988-12-01), Ma
patent: 4811423 (1989-03-01), Eastmond
Wide Band Tuner, Double Conversion Tuner, Consumer Products Research Centre, Hitachi, Ltd., pp. 49-54.
Wide Band Double Conversion TV Tuner, Tohru Kasanami, Seiichi Arai, Kazunari Kawahata, Murata Mfg. Co., Ltd., pp. 25-30.

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