Automatic gain control for RF amplifier

Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation

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455254, 455266, 455307, H04B 110, H04B 126

Patent

active

053394542

ABSTRACT:
A radio receiver simultaneously achieves maximum sensitivity and minimum susceptibility to intermodulation distortion by employing wideband and narrowband automatic gain control which further selects the automatic gain control response in dependence on the detection of intermodulation distortion. An AGC signal is modified to improve sensitivity in the event of a low narrowband signal level except when intermodulation distortion is detected above a predetermined distortion level.

REFERENCES:
patent: 3947771 (1976-03-01), Mathews et al.
patent: 4388731 (1983-06-01), King
patent: 4776040 (1988-10-01), Ichikawa et al.
patent: 5001776 (1991-03-01), Clark
Sanyo Data Sheet for LA1170 FM Front End Circuit pp. 122-132.

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