Digital trigger

Details Digital trigger Digital trigger

1988-10-17

1989-12-19

Shoop, Jr., William M.

Coded data generation or conversion

Sample and hold

341155, H03M 112

Patent

active

048885886

ABSTRACT:
A digital trigger for a digitizing instrument having multiple analog-to-digital converters employed in interleaved fashion and in which the clock phase and period of a trigger point can be accurately determined. The digital trigger includes a digital comparator for comparing the output signals of each analog-to-digital converter to a trigger threshold level to generate a trigger signal at the output of the comparator if a trigger point occurs on the output signal. The outputs of the collective digital comparators are routed to decoding logic which generates a digital signal that indicates the phase of the clock period in which the trigger point occurred. The outputs of collective digital comparators are also logically ORed together for detecting if a trigger point occurred during a clock period.

REFERENCES:
patent: 4578667 (1986-03-01), Hollister
patent: 4656598 (1987-04-01), Wilson
patent: 4755951 (1988-07-01), Hollister
patent: 4768017 (1988-08-01), Gordon
patent: 4791404 (1988-12-01), Hollister
Tektronix, "The XYZ's of Using a Scope", 1986, pp. 15-21, TEK Multipurpose Oscilloscopes.

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