Combined limiting/AGC IF system

Details Combined limiting/AGC IF system Combined limiting/AGC IF system

1973-09-17

1990-10-30

Moskowitz, Nelson

Amplifiers

Signal feedback

Variable impedance in feedback path varied by separate...

330 85, 330189, H03F 136

Patent

active

049671634

ABSTRACT:
A gain control system for a receiver that combines some of the features of oth limiting and AGC. The AGC loop of the present invention has a relatively long time constant which reduces the gain so that the desired signal is only 10 to 15 db into limiting. This degree of limiting provides instantaneous control of small changes in signal level, but prevents the receiver from instantaneously opening to full gain in the case of loss of signal. This prevents erroneous data from being received during a time interval in which it is expected that the original signal will return.

REFERENCES:
patent: 3673498 (1970-05-01), Harford

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