发明申请
- 专利标题： Detection circuit, physical quantity measurement circuit, physical quantity measurement device, and electronic instrument
- 专利标题（中）： 检测电路，物理量测量电路，物理量测量装置和电子仪器
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申请号： US12155383申请日： 2008-06-03
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公开(公告)号： US20090013785A1公开(公告)日： 2009-01-15
- 发明人: Naoki Yoshida , Masahiro Kanai , Eitaro Otsuka
- 申请人： Naoki Yoshida , Masahiro Kanai , Eitaro Otsuka
- 申请人地址： JP TOKYO
- 专利权人： SEIKO EPSON CORPORATION
- 当前专利权人： SEIKO EPSON CORPORATION
- 当前专利权人地址： JP TOKYO
- 优先权： JP2007-147721 20070604
- 主分类号： G01P15/00
- IPC分类号： G01P15/00
摘要：
A detection circuit includes a detection terminal to which an alternating current signal from a physical quantity transducer is input, a detection current/voltage conversion amplifier circuit that converts the alternating current signal input through the detection terminal into a voltage signal, an evaluation terminal that supplies an evaluation voltage signal to the detection current/voltage conversion amplifier circuit, an input resistor that has a given resistance ratio with respect to a feedback resistor; and a switch circuit of the detection circuit provided in a signal path that connects the evaluation terminal and an input node of the detection current/voltage conversion amplifier circuit.