发明名称 |
Direct-measurement provision to keep backdriving within safe levels |
摘要 |
<p>Pin-driver circuitry in each of an automatic circuit tester (10)'s digital driver/sensor circuits (36) includes a current sensor (Rsense, QS1, QS2, D1, and D2) and comparison circuit (58) that indicate whether the load current supplied by the driver exceeds a level set by a threshold input (CURRENT_VALUE). The pin-driver circuitry also includes a timer (60) whose output indicates whether the comparison circuit's output has been asserted for a length of time that exceeds a limit set by a duration input (TIME_VALUE). When it has, the tester disables the driver and thereby prevents damage that could otherwise result from excessive backdrive durations that the test-generation process did not anticipate. <IMAGE></p> |
申请公布号 |
EP1020731(A2) |
申请公布日期 |
2000.07.19 |
申请号 |
EP19990125022 |
申请日期 |
1999.12.15 |
申请人 |
GENRAD, INC. |
发明人 |
SUTO, ANTHONY J.;MULLER, ROBERT J.;MONIZ, JOHN D. |
分类号 |
G01R31/28;G01R31/319;(IPC1-7):G01R31/28 |
主分类号 |
G01R31/28 |
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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