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1. 发明授权

US08461926B2 Differential amplifier circuit 有权
标题翻译：差分放大电路
公开(公告)号：US08461926B2
公开(公告)日：2013-06-11
申请号：US13309687
申请日：2011-12-02
申请人： Akiko Mineyama , Yoichi Kawano , Toshihide Suzuki
发明人： Akiko Mineyama , Yoichi Kawano , Toshihide Suzuki
IPC分类号： H03F3/45
CPC分类号： H03F3/45179 , H03F1/56 , H03F2200/102 , H03F2200/387 , H03F2203/45318 , H03F2203/45332 , H03F2203/45654 , H03F2203/45688
摘要： A differential amplifier circuit includes a first/second field effect transistor including a gate coupled to a first/second differential input signal terminal, a source coupled to a reference potential node, and a drain coupled to a first/second differential output signal terminal, a first variable capacitor coupled between the gate of the first field effect transistor and the drain of the second field effect transistor, a second variable capacitor coupled between the gate of the second field effect transistor and the drain of the first field effect transistor, and a first envelope detector configured to detect an envelope of a signal at the first differential output signal terminal or the second differential output signal terminal, the first variable capacitor and/or the second variable capacitor has a capacitance that varies in accordance with an envelope detected by the first envelope detector.
摘要翻译：差分放大器电路包括第一/第二场效应晶体管，其包括耦合到第一/第二差分输入信号端子的栅极，耦合到参考电势节点的源极和耦合到第一/第二差分输出信号端子的漏极，耦合在第一场效应晶体管的栅极和第二场效应晶体管的漏极之间的第一可变电容器，耦合在第二场效应晶体管的栅极和第一场效应晶体管的漏极之间的第二可变电容器，包络检测器被配置为检测第一差分输出信号端或第二差分输出信号端的信号包络，第一可变电容和/或第二可变电容具有根据由第一差分输出信号包络检测器。

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