发明授权
US07994846B2 Method and mechanism to reduce current variation in a current reference branch circuit
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减小电流参考分支电路中电流变化的方法和机制
- 专利标题: Method and mechanism to reduce current variation in a current reference branch circuit
- 专利标题(中): 减小电流参考分支电路中电流变化的方法和机制
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申请号: US12465941申请日: 2009-05-14
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公开(公告)号: US07994846B2公开(公告)日: 2011-08-09
- 发明人: Oded Katz , Israel A. Wagner
- 申请人: Oded Katz , Israel A. Wagner
- 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: Zaretsky & Associates, PC
- 代理商 Suzanne Erez
- 主分类号: G05F3/24
- IPC分类号: G05F3/24
摘要:
A feedback mechanism to reduce current variation observed in a current reference branch circuit by using body voltage control to compensate process, temperature and supply voltage variations. The current reference output voltage, which is proportional to the reference current, is sampled into a feedback loop, which controls the field effect transistor body voltage. The method and mechanism uses Corner Robust Current Reference in order to keep the design simple and diminish variation between Process Voltage Temperature (PVT) corners. This method exhibits small variation in the reference current magnitude.
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