Automatic pattern synchronizing circuit of an error detector

Details Automatic pattern synchronizing circuit of an error detector Automatic pattern synchronizing circuit of an error detector

1994-04-28

1995-10-31

Voeltz, Emanuel T.

Excavating

364484, G01R 3128

Patent

active

054636396

ABSTRACT:
An automatic pattern synchronizing circuit re-times the phase differences between clocks, thereby adjusting test pattern outputs from a device under test. The automatic pattern synchronizing circuit includes a reference voltage generator for providing a threshold voltage, a comparator for converting an input signal into a rectangular signal, a flip-flop, a pattern-counter part for counting a signal from the flip-flop and a control part for setting the threshold voltage in the comparator. The automatic pattern synchronizing circuit automatically synchronizes voltage patterns. In particular, the high and low voltage levels of the input waveform are automatically measured and the optimum threshold voltage is automatically set.

REFERENCES:
patent: 3596245 (1971-07-01), Finnie
patent: 4048481 (1977-09-01), Bailey, Jr. et al.
patent: 4133037 (1979-01-01), Overman et al.
patent: 4635256 (1987-01-01), Herlein
patent: 4649543 (1987-03-01), Levine
patent: 4660197 (1987-04-01), Wrinn et al.
patent: 4682343 (1987-07-01), Pfiffner
patent: 5014226 (1991-05-01), Horstmann et al.

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