High dynamic range detector for indicating the quieting level of

Details High dynamic range detector for indicating the quieting level of High dynamic range detector for indicating the quieting level of

1977-05-02

1979-05-29

Griffin, Robert L.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

325364, 329146, H04B 116, H04B 1700

Patent

active

041568486

ABSTRACT:
The pre-limited IF signal from an FM receiver is coupled to a pair of linear amplifiers in a cascade configuration. The outputs from the amplifiers are detected and passed to piecewise linear amplifiers. Each piecewise linear amplifier is designed to exhibit a gain characteristic which is dependent on the level of signals applied at its input. A summing circuit sums the piecewise linear amplified signals in predetermined proportion to thereby produce a DC signal which is linearly related to the receiver's quieting level.

REFERENCES:
patent: 3435353 (1969-03-01), Sauber
patent: 3525045 (1970-08-01), Von Recklinghausen
patent: 3673499 (1972-06-01), Avins et al.
patent: 3753120 (1973-08-01), Ohsawa
patent: 3965425 (1976-06-01), Peterson et al.

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