Automatic gain control apparatus

Details Automatic gain control apparatus Automatic gain control apparatus

2007-11-13

2007-11-13

Nguyen, Khanh Van (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S129000

Reexamination Certificate

active

11334405

ABSTRACT:
An automatic gain control apparatus receiving an analog signal and outputting a digital signal includes a variable gain amplifier, an A/D converter, and a feedback circuit. The variable gain amplifier amplifies the analog signal with a gain. The A/D converter converts the amplified analog signal to the digital signal. The feedback circuit includes an amplitude level detector, a range detector, and a gain controller. The amplitude level detector generates a first amplitude level and a second amplitude level in response to the digital signal. The range detector generates an adjustment signal in response to the first amplitude level and the second amplitude level. The gain controller adjusts a gain control level for the variable gain amplifier in response to the adjustment signal.

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