发明授权
- 专利标题： Reference current source circuit provided with plural power source circuits having temperature characteristics
- 专利标题（中）： 具有多个具有温度特性的电源电路的基准电流源电路
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申请号： US12713362申请日： 2010-02-26
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公开(公告)号： US08305134B2公开(公告)日： 2012-11-06
- 发明人: Tetsuya Hirose , Toyoaki Kito , Yuji Osaki
- 申请人： Tetsuya Hirose , Toyoaki Kito , Yuji Osaki
- 申请人地址： JP Kanagawa
- 专利权人： Semiconductor Technology Academic Research Center
- 当前专利权人： Semiconductor Technology Academic Research Center
- 当前专利权人地址： JP Kanagawa
- 代理机构： Wenderoth Lind & Ponack, L.L.P.
- 优先权： JP2009-048379 20090302; JP2010-040627 20100225
- 主分类号： G05F1/10
- IPC分类号： G05F1/10
摘要：
A reference current source circuit outputs a constant reference current even if surrounding environments such as temperature and power source voltage change in a power source circuit that operates in a minute current region in an order of nanoamperes. The reference current source circuit includes an nMOS-configured power source circuit, a pMOS-configured power source circuit, and a current subtracter circuit. The nMOS-configured power source circuit includes a current generating nMOSFET, and generates a first current having temperature characteristics of an output current dependent on an electron mobility. The pMOS-configured power source circuit includes a current generating pMOSFET, and generates a second current having temperature characteristics of an output current dependent on a hole mobility. The current subtracter circuit generates a constant reference current by subtracting the second current from the first current.
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