发明授权
US08428207B1 System and method for determining a time for safely sampling a signal of a clock domain
有权
用于确定用于安全采样时钟域的信号的时间的系统和方法
- 专利标题: System and method for determining a time for safely sampling a signal of a clock domain
- 专利标题(中): 用于确定用于安全采样时钟域的信号的时间的系统和方法
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申请号: US12957262申请日: 2010-11-30
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公开(公告)号: US08428207B1公开(公告)日: 2013-04-23
- 发明人: William Dally , Stephen G. Tell
- 申请人: William Dally , Stephen G. Tell
- 申请人地址: US CA Santa Clara
- 专利权人: NVIDIA Corporation
- 当前专利权人: NVIDIA Corporation
- 当前专利权人地址: US CA Santa Clara
- 代理机构: Zilka-Kotab, PC
- 主分类号: H04L7/00
- IPC分类号: H04L7/00
摘要:
A system and method are provided for determining a time for safely sampling a signal of a clock domain. In one embodiment, a frequency estimate of a first clock domain is calculated utilizing a frequency estimator. Additionally, a time during which a signal from the first clock domain is unchanging is determined such that the signal is capable of being safely sampled by a second clock domain, using the frequency estimate. In another embodiment, a frequency estimate of a first clock domain is calculated utilizing a frequency estimator. Further, a phase estimate of the first clock domain is calculated based on the frequency estimate, utilizing a phase estimator. Moreover, a time during which a signal from the first clock domain is unchanging is determined such that the signal is capable of being safely sampled by a second clock domain, using the phase estimate.
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