发明名称 |
Method and apparatus for precision gain control for amplified signals |
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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申请公布号 |
US5515004(A) |
申请公布日期 |
1996.05.07 |
申请号 |
US19950380868 |
申请日期 |
1995.01.30 |
申请人 |
MOTOROLA, INC. |
发明人 |
ALFORD, RONALD C.;MARTIN, FREDERICK L. |
分类号 |
H03G3/30;(IPC1-7):H03G3/30 |
主分类号 |
H03G3/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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