发明授权
- 专利标题： Operational amplifier
- 专利标题（中）： 运算放大器
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申请号： US12887862申请日： 2010-09-22
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公开(公告)号： US08115539B2公开(公告)日： 2012-02-14
- 发明人: Toshiyuki Tsuzaki , Akira Takeda
- 申请人： Toshiyuki Tsuzaki , Akira Takeda
- 申请人地址： JP Chiba
- 专利权人： Seiko Instruments Inc.
- 当前专利权人： Seiko Instruments Inc.
- 当前专利权人地址： JP Chiba
- 代理机构： Brinks Hofer Gilson & Lione
- 优先权： JP2009-221233 20090925
- 主分类号： H03F1/02
- IPC分类号： H03F1/02
摘要：
Provided is an operational amplifier capable of correcting an offset voltage of an element to be connected to an input terminal. The operational amplifier includes a main amplifier and an offset correction amplifier, which include input terminals connected in common. The main amplifier includes: a first transconductance amplifier for measurement; a second transconductance amplifier for offset correction; and a first capacitor connected to an input terminal of the second transconductance amplifier. The offset correction amplifier includes: a third transconductance amplifier for measurement; a fourth transconductance amplifier for offset correction; and a second capacitor connected to one input terminal of the fourth transconductance amplifier. An offset voltage adjustment circuit is provided to another input terminal of the fourth transconductance amplifier included in the offset correction amplifier.
公开/授权文献
- US20110074503A1 OPERATIONAL AMPLIFIER 公开/授权日：2011-03-31
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