发明名称 |
Apparatus, system, and method for precise early detection of AC power loss |
摘要 |
An apparatus, system, and method are disclosed for determining power source failure. A sampling module samples an alternating current power waveform as input to a power supply, at a sampling frequency which is a multiple of a predetermined frequency, to obtain a sampled amplitude at a known point within the predetermined period. A comparison module compares the sampled amplitude to a stored threshold amplitude to obtain a comparison result, corresponding to the known point. An accumulation module accumulates most recent comparison results. A warning module asserts an early power off warning signal if a predetermined number of the most recent comparison results each indicate that the sampled amplitude is smaller in absolute value than the stored threshold amplitude. |
申请公布号 |
US8214165(B2) |
申请公布日期 |
2012.07.03 |
申请号 |
US20080346307 |
申请日期 |
2008.12.30 |
申请人 |
DISHMAN C. CHARLES;LIN JEN-CHING;MALIK RANDHIR S.;INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
DISHMAN C. CHARLES;LIN JEN-CHING;MALIK RANDHIR S. |
分类号 |
G01R21/00 |
主分类号 |
G01R21/00 |
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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