发明名称 |
Digital phase and frequency comparator circuit |
摘要 |
A digital phase and frequency comparator circuit establishes phase and frequency windows to determine if two AC signals are in phase and of substantially the same frequency. A phase difference between the two signals is determined by exclusively ORing the two signals and timing the duration of a signal state to determine if the phase difference exceeds a threshold. The two AC signals are also ANDed and counted to determine the frequency agreement.
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申请公布号 |
US4527080(A) |
申请公布日期 |
1985.07.02 |
申请号 |
US19830514476 |
申请日期 |
1983.07.18 |
申请人 |
AT&T BELL LABORATORIES |
发明人 |
ZWEIG, WALTER L. |
分类号 |
G01R23/15;G01R25/08;(IPC1-7):H03K5/153;H03K12/00;H03K19/21 |
主分类号 |
G01R23/15 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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