Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1989-12-26
1991-12-31
Wieder, Kenneth A.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
371 251, 371 225, G01R 3100, G01R 3102
Patent
active
050775219
ABSTRACT:
A monitor device connected between a pin for connection to the more positive lead of the voltage supply or the less positive voltage of the power supply and the more positive voltage supply conductors or the less positive voltage supply conductors on the integrated circuit substrate. The monitor circuit has a threshold circuit so insignificant perturbations will not trigger the monitor. The monitor circuit also has a reference voltage input such that the same circuit may be used for the more positive side of the power supply, as well as, the less positive side with straightforward modifications. When the monitor circuit detects a significant fault, i.e. one that could falsely switch part of the integrated circuit, it sets a flip-flop to record such an occurrence. The monitor flip-flop cannot be reset by the usual reset signals, in order to prevent it from being cleared by normal diagnostics and error recovery operations.
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IBM Technical Disclosure Bulletin, "In Situ Monitoring of Modules," by L. F. Waldow, vol. 21, No. 6, pp. 2416-2417, Nov. 1978.
Bullinger Philip W.
Farris Richard D.
Langford, II Thomas L.
Burns William J.
NCR Corporation
Penrod Jack R.
Wieder Kenneth A.
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