发明授权
US07893766B1 Adaptive common mode bias for differential amplifier input circuits
有权
差分放大器输入电路的自适应共模偏置
- 专利标题： Adaptive common mode bias for differential amplifier input circuits
- 专利标题（中）： 差分放大器输入电路的自适应共模偏置
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申请号： US12557139申请日： 2009-09-10
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公开(公告)号： US07893766B1公开(公告)日： 2011-02-22
- 发明人: Hayden Clavie Cranford, Jr. , Todd Morgan Rasmus , Joseph Marsh Stevens
- 申请人： Hayden Clavie Cranford, Jr. , Todd Morgan Rasmus , Joseph Marsh Stevens
- 申请人地址： US NY Armonk
- 专利权人： International Business Machines Corporation
- 当前专利权人： International Business Machines Corporation
- 当前专利权人地址： US NY Armonk
- 代理机构： Yee & Associates, P.C.
- 代理商 Ian D. MacKinnon
- 主分类号： H03F3/45
- IPC分类号： H03F3/45
摘要：
A method and apparatus for extending the common mode range of a differential amplifier. A circuit has a common mode detection circuit, a common mode voltage inversion circuit, and a differential amplifier. The common mode detection circuit receives a differential signal and detects a common mode voltage. The common mode voltage inversion circuit is coupled to the common mode detection circuit. The common mode voltage inversion circuit has an input node that receives the common mode voltage and an output node that outputs body voltage, wherein the common mode voltage inversion circuit creates an inverse relationship between the common mode voltage and the body voltage. The differential amplifier includes a differential pair of transistors that have a pair of body terminals coupled to the output node of the common mode voltage inversion circuit.
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