Invention Grant
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
- Patent Title: System and method for determining a time for safely sampling a signal of a clock domain
- Patent Title (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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Application No.: US12957262Application Date: 2010-11-30
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Publication No.: US08428207B1Publication Date: 2013-04-23
- Inventor: William Dally , Stephen G. Tell
- Applicant: William Dally , Stephen G. Tell
- Applicant Address: US CA Santa Clara
- Assignee: NVIDIA Corporation
- Current Assignee: NVIDIA Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: Zilka-Kotab, PC
- Main IPC: H04L7/00
- IPC: H04L7/00

Abstract:
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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