Automatic gain control circuit and apparatus including such a ci

Details Automatic gain control circuit and apparatus including such a ci Automatic gain control circuit and apparatus including such a ci

1995-09-08

1997-01-14

Chin, Stephen

Pulse or digital communications

Receivers

Automatic gain control

330254, 4552451, H04L 2708

Patent

active

055947603

ABSTRACT:
Automatic gain control circuit comprising amplifier means (10) which produce an output signal that has an amplitude controlled by a control signal (CT). Recursive filter apparatus (20) (22) measures the power of the output signal and yield a measure of power which is compared (24) with a window of permitted power values to generate the control signal (CT). Depending on the result of the comparison, an initialization signal (INI) is transmitted which enforces a reference power value on a recursive filter to accelerate the gain control. Utilization in apparatus that use signals that have fast and considerable amplitude variations, as in digital modulation signal receivers.

REFERENCES:
patent: 4691377 (1987-09-01), Yoshihara et al.
patent: 4870370 (1989-09-01), Hedberg et al.

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