发明授权
- 专利标题: Amplifier circuit
- 专利标题(中): 放大器电路
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申请号: US11703026申请日: 2007-02-06
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公开(公告)号: US07508258B2公开(公告)日: 2009-03-24
- 发明人: Hirokazu Yoshizawa , Ryoichi Anzai , Toshiyuki Uchida , Akira Takeda , Minoru Ariyama , Atsushi Igarashi
- 申请人: Hirokazu Yoshizawa , Ryoichi Anzai , Toshiyuki Uchida , Akira Takeda , Minoru Ariyama , Atsushi Igarashi
- 申请人地址: JP Chiba JP Saitama
- 专利权人: Seiko Instruments Inc.,Gakkouhoujin Chikoujigakuen
- 当前专利权人: Seiko Instruments Inc.,Gakkouhoujin Chikoujigakuen
- 当前专利权人地址: JP Chiba JP Saitama
- 代理机构: Brinks Hofer Gilson & Lione
- 优先权: JP2006-029138 20060207
- 主分类号: H03F1/02
- IPC分类号: H03F1/02
摘要:
Provided is a chopper amplifier circuit capable of eliminating an influence of a slew rate of an amplifier and suppressing spike generation to thereby obtain an output signal having little harmonic distortion. The chopper amplifier circuit according to the present invention includes: a first chopper circuit for chopping an input signal by a first pulse and a second pulse shifted from each other in phase by a half cycle, switching a relation of connection between an input terminal pair and an output terminal pair at a timing of the chopping, and outputting the input signal as a modulated signal; an amplifier for amplifying the modulated signal and outputting the modulated signal thus amplified as an amplified signal; a first sample hold circuit for holding the amplified signal at the first pulse and outputting the amplified signal at the second pulse; and a second sample hold circuit for holding the amplified signal at the second pulse and outputting the amplified signal at the first pulse.
公开/授权文献
- US20070222509A1 Amplifier circuit 公开/授权日:2007-09-27