Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1993-04-07
1994-02-01
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324158F, G01R 1073, G01R 3102
Patent
active
052835189
ABSTRACT:
Algorithms are set forth for positioning critical test signal pins in a short-wire board test fixture so as to efficiently minimize ground bounce. The board test fixture interfaces a test system to a circuit board under test. Critical signals are those signals susceptible to ground bounce. The test signal pins connect a ground plane in the board test fixture to pin cards interfaced to the board test system. Each pin card has a first column of test signal pins and a set of first ground pins. Moreover, each pin card has a second column comprising a set of second ground pins. In order to minimize ground bounce, no more than fifteen second ground pins per pin card are inactive. No more than two consecutive second ground pins per pin card are inactive. Any critical test signals are assigned within three pins of an exclusive first ground pin. Finally, any ordinary test signals are assigned more than four pins from any critical test signals.
REFERENCES:
patent: 4116523 (1978-09-01), Coberly et al.
patent: 4740746 (1988-04-01), Pollock et al.
King Philip N.
Richert T. Risselle
Hewlett--Packard Company
Karlsen Ernest F.
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