发明授权
- 专利标题： Power supply insensitive PTAT voltage generator
- 专利标题（中）： 电源不灵敏PTAT电压发生器
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申请号： US12021484申请日： 2008-01-29
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公开(公告)号： US07777475B2公开(公告)日： 2010-08-17
- 发明人: Michael A. Sperling , Paul D. Muench , George E. Smith, III
- 申请人： Michael A. Sperling , Paul D. Muench , George E. Smith, III
- 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
- 代理商 William A. Kinnaman, Jr.
- 主分类号： G05F3/16
- IPC分类号： G05F3/16 ; G05F3/26
摘要：
A method and apparatus for generating a voltage that is proportional to an absolute temperature (PTAT voltage). A current generator for generating a current that is proportional to absolute temperature (PTAT current) has an internal resistance and two diodes. The PTAT current is proportional to the resistance, and the temperature coefficient of the PTAT current is defined by the ratio of diode current densities. A feedback circuit has a source follower that is connected to the current generator for driving the output node with a regulated PTAT current wherein the PTAT current is mirrored accurately, providing a constant Vref.
公开/授权文献
- US20090189591A1 Power Supply Insensitive PTAT Voltage Generator 公开/授权日：2009-07-30
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