Programmable time advance

Details Programmable time advance Programmable time advance

1988-07-28

1989-10-24

Safourek, Benedict V.

Pulse or digital communications

Spread spectrum

Direct sequence

331 1A, 331179, H03L 710

Patent

active

048767026

ABSTRACT:
The programmable time advance circuit functions to offset the inherent delay occasioned by the phase lock loop and the drive circuits of a printed circuit board test system to provide a clock signal at the output of the printed circuit board test system that exactly matches the clock signal of the printed circuit board under test at the printed circuit board under test. This is accomplished by inserting a clock advance signal into the phase locked loop to advance the timing of the clock signal generator circuit in the printed circuit board test system to compensate for the delay occasioned by the conductors and driver circuits in the printed circuit board test system.

REFERENCES:
patent: 4105948 (1978-08-01), Wolkstein
patent: 4387351 (1983-06-01), Furiga et al.
patent: 4419633 (1983-12-01), Phillips
patent: 4724401 (1988-02-01), Hogge Jr. et al.

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