Digital controlled AGC

Details Digital controlled AGC Digital controlled AGC

2006-07-11

2006-07-11

Tran, Pablo N. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S234100, C455S240100, C455S234200, C455S244100

Reexamination Certificate

active

07076222

ABSTRACT:
An automatic gain control loop for a radio receiver, comprising a switchable lowpass filter (21) to reduce distortions in an analogue gain control signal (6) by switching said switchable lowpass filter (21) to a low time constant in case a change of a gain control signal (6) of the automatic gain control loop lies above a predetermined threshold, which low time constant is lower than a normally used time constant, comprises a hold unit (24) which affects that said switchable lowpass filter (21) uses said low time constant a predetermined time after a change of the gain control signal (6) of the automatic gain control loop lies below said predetermined threshold.

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Patent Abstracts of Japan vol. 1999, No. 11, Sep. 30, 1999 & JP 11 148950 A (Oki Electric Ind Co Ltd), Jun. 2, 1999.
Cascade 1—Gain Distribution“Radio Receiver Design”pp. 691-695.

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