发明授权
- 专利标题： Method and system for calculating timing variations considering simultaneous switching noise
- 专利标题（中）： 考虑同时开关噪声计算定时变化的方法和系统
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申请号： US12690047申请日： 2010-01-19
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公开(公告)号： US08825420B1公开(公告)日： 2014-09-02
- 发明人: Geping Liu , Kundan Chand , Zhe Li , Wui Hung Moo , Joseph Boon Hock Kho
- 申请人： Geping Liu , Kundan Chand , Zhe Li , Wui Hung Moo , Joseph Boon Hock Kho
- 申请人地址： US CA San Jose
- 专利权人： Altera Corporation
- 当前专利权人： Altera Corporation
- 当前专利权人地址： US CA San Jose
- 代理机构： Womble, Carlyle, Sandridge & Rice LLP
- 主分类号： G01R13/00
- IPC分类号： G01R13/00
摘要：
A computer implemented method for determining a timing variation for an edge of a waveform under simultaneous switching noise (SSN) conditions is provided. The method includes characterizing an impact of mutual inductive relationships on a pin while the pin is at a quiet state and characterizing a signal edge applied to the pin. The signal edge can be characterized by the slew rate in one embodiment. A voltage change related to a curve characterizing the impact of mutual inductive relationships is identified and the voltage change is applied to a curve characterizing an impact of SSN on the signal edge. The method includes calculating a timing variation correlated to the voltage change applied to the curve characterizing the impact of SSN on the signal edge and presenting the calculated timing variation.
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