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Method and apparatus for precision gain control for amplified signals
Method and apparatus for precision gain control for amplified signals
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机译:用于放大信号的精确增益控制的方法和设备
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摘要
An automatic gain control circuit (100) provides precision gain control for amplified signals. An offset generator (130) generates an offset signal (132) from an output signal (108) of a variable gain amplifier, shifted according to a target signal level, and another offset signal (134) according to a base signal (106). A pulse train generator (140) compares the offset signals (108, 106) and provides a pulse train signal (142) having a particular energy content. A feedback signal (172) based on the particular energy content of the pulse train signal (142) is used to adjust the gain of the variable amplifier (110).
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