Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1988-05-27
1990-10-23
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324 731, 324121R, G01R 3128, G01R 1320
Patent
active
049655167
ABSTRACT:
A semiconductor test instrument (12) provides an AC interrogating signal to an element under test, such as a single pin of an IC. Horizontal and vertical signals are developed and applied to a display (33) which produces an analog signature signal representative of the operating condition of the test element. The horizontal and vertical signals are converted to digital signals by an A-D converter (34) and stored in memory (39). An analog signature is also obtained from the same element as the test element but which is known to be good. The horizontal and vertical components of this signature are also converted into digital signals and stored in memory (42). The test and reference digital signals are then compared and those test digital signals which are different identified. The analog signatures corresponding to both the test and reference digital values are then reconstructed for display and superimposed, for viewing by an operator.
REFERENCES:
patent: 3991302 (1976-11-01), Danner
Hoo James W.
Howard Alan D.
Masten Michael M.
Parshotam Mahesh
Pennock James L.
Huntron Instruments, Inc.
Karlsen Ernest F.
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