发明名称 |
Variable gain control circuit and integrated circuit device having the same |
摘要 |
A variable gain control circuit is provided comprising a bipolar transistor for amplifying an input signal applied to a base, and outputs an output signal via a collector; a serial exchanging unit connected between an emitter of the bipolar transistor; a first voltage node; a parallel exchanging unit connected between the collector of the bipolar transistor and the first voltage node, and wherein the gain of the variable gain control circuit increases in a high gain mode by activating the serial exchanging unit and deactivating the parallel exchanging unit, and the gain of the variable gain control circuit decreases in a low gain mode by deactivating the serial exchanging unit and activating the parallel exchanging unit.
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申请公布号 |
US6859105(B2) |
申请公布日期 |
2005.02.22 |
申请号 |
US20030349401 |
申请日期 |
2003.01.22 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
AHN KWANG-HO |
分类号 |
H03G1/00;(IPC1-7):H03F3/191;H03G3/30 |
主分类号 |
H03G1/00 |
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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