Automatic gain control circuit and an RF receiver and method...

Details Automatic gain control circuit and an RF receiver and method... Automatic gain control circuit and an RF receiver and method...

2006-06-20

2006-06-20

Trinh, Sonny (Department: 2687)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S136000, C455S232100

Reexamination Certificate

active

07065335

ABSTRACT:
An automatic gain control (AGC) circuit including: a forward transmission path (214) having applied at its input an input RF signal and to provide at its output an output signal; a variable gain AGC amplifier (210) in the forward transmission path for processing the input RF signal, which amplifier has a control input240and is responsive to a control signal applied at its control input to vary its gain; a feedback loop (220to240), coupled from the output of the forward transmission path and to the control input of the AGC amplifier; an integrator (230, 232), coupled to the control input of the amplifier; a voltage source (234), coupled to the integrator and to the control input of the amplifier; and a further variable gain device (215) for varying the gain or attenuation of a signal applied to the control input of the AGC amplifier.

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Patent Abstracts of Japan vol. 1998, No. 03, Feb. 27, 1998.

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