发明名称 |
AUTOMATIC GAIN CONTROL CIRCUIT |
摘要 |
In an automatic gain control circuit, a peak detection circuit detects and outputs the peak voltage of an output signal from a variable gain circuit. An average value detection/output amplitude setting circuit detects the average value voltage of an output signal from the variable gain circuit, and outputs a calculated voltage. An amplification circuit controls the gain of the variable gain circuit by amplifying the difference between the output voltages of the peak detection circuit and average value detection/output amplitude setting circuit. The number of base-emitter junctions of transistors on a path in the peak detection circuit from input ports which receive output signals from the variable gain circuit to an output port which outputs a voltage to the amplification circuit is equal to the number of base-emitter junctions of transistors on a path in the average value detection/output amplitude setting circuit.
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申请公布号 |
US2012326782(A1) |
申请公布日期 |
2012.12.27 |
申请号 |
US201213527512 |
申请日期 |
2012.06.19 |
申请人 |
SANO KIMIKAZU;FUKUYAMA HIROYUKI;NOSAKA HIDEYUKI;NAKAMURA MAKOTO;MURATA KOICHI;TOBAYASHI MASATOSHI;INABE YASUNOBU;TSUCHIYA EISUKE |
发明人 |
SANO KIMIKAZU;FUKUYAMA HIROYUKI;NOSAKA HIDEYUKI;NAKAMURA MAKOTO;MURATA KOICHI;TOBAYASHI MASATOSHI;INABE YASUNOBU;TSUCHIYA EISUKE |
分类号 |
H03G3/20 |
主分类号 |
H03G3/20 |
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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