发明名称 |
Method and apparatus for detecting open circuit fault condition in a common-mode signal |
摘要 |
The present invention relates to an apparatus and a method for detecting an open circuit fault condition in a differential signal, and generating a fault detection signal. An open circuit fault condition is detected by employing weak current sources to pull the differential signal paths outside the valid ac common-mode range and toward the supply rails. If both signal paths can be pulled within a predetermined proximity to the supply rails by their respective weak current sources, an open condition fault is defined to exist and a fault detection signal is generated. The fault detection signal can be used by another device to report the fault condition.
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申请公布号 |
US6563322(B1) |
申请公布日期 |
2003.05.13 |
申请号 |
US20010935561 |
申请日期 |
2001.08.22 |
申请人 |
NATIONAL SEMICONDUCTOR CORPORATION |
发明人 |
HANNAN DOUGLAS MICHAEL |
分类号 |
H04L25/08;(IPC1-7):G01R31/08;G01R31/14;H01H31/02;H03K17/16;H03K19/013 |
主分类号 |
H04L25/08 |
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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