AGC circuit of an FM receiver that reduces interference...

Details AGC circuit of an FM receiver that reduces interference... AGC circuit of an FM receiver that reduces interference...

2006-05-23

2006-05-23

Nguyen, Simon (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S241100, C455S245200, C455S251100, C455S253100, C455S234100, C375S345000

Reexamination Certificate

active

07050774

ABSTRACT:
A first AGC voltage and a second AGC voltage are taken from the final stage of a radio-frequency circuit and the output side of a bandpass filter, respectively, and the gain of the radio-frequency circuit is controlled on the basis of the two AGC voltages. The pass-band width of the bandpass filter is approximately two times greater than the frequency interval of FM broadcast signals. The second AGC voltage is set higher than the first AGC voltage in the pass-band of the bandpass filter.

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