发明名称 |
Semiconductor integrated circuit device |
摘要 |
There is a need for providing a variable amplifier circuit suited for a semiconductor integrated circuit and a high-performance camera preprocessing LSI using the variable amplifier circuit. At first timing, a first input capacitor acquires a first signal. An amplifier circuit amplifies a second signal acquired to the second input capacitor according to a gain corresponding to a capacity ratio between the second input capacitor and a feedback capacitor composed of a variable capacitor device. At second timing, the second input capacitor acquires a second signal. The amplifier circuit amplifies the first signal according to a gain corresponding to a capacity ratio between the first input capacitor and the feedback capacitor. A variable gain amplifier circuit interleavingly amplifies the first signal and the second signal in synchronization with the first timing and the second timing.
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申请公布号 |
US7295143(B2) |
申请公布日期 |
2007.11.13 |
申请号 |
US20060494517 |
申请日期 |
2006.07.28 |
申请人 |
RENESAS TECHNOLOGY CORP. |
发明人 |
AMBO TAKANOBU;IMAIZUMI EIKI;JIMBO SATOSHI |
分类号 |
H03M1/12;H04N5/341;H04N5/357;H04N5/363;H04N5/369;H04N5/378 |
主分类号 |
H03M1/12 |
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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