Instrument for measuring the phase jitter of analog signals

Details Instrument for measuring the phase jitter of analog signals Instrument for measuring the phase jitter of analog signals

1988-04-27

1989-04-04

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Phase comparison

324 78R, 375118, 328155, G01R 2500

Patent

active

048190802

ABSTRACT:
The instrument measures directly the phase jitter of analog signals emitted n the line by the device under test, even when clock information is not available and when particular specifications and limitations do not allow the use of analog instruments. It uses a circuit which generates a square-wave clock signal with the same phase and frequency characteristics as the signal to be measured, so as a phase comparison with a reference signal can be made. Error signal obtained is filtered, measured and displayed.

REFERENCES:
patent: 4144489 (1979-03-01), Ward et al.
patent: 4144572 (1979-03-01), Starner et al.
patent: 4149044 (1979-04-01), Hekimian
patent: 4320516 (1982-03-01), Kammerlander
patent: 4412299 (1983-10-01), Huffman
patent: 4607218 (1986-08-01), Stosel
patent: 4654861 (1987-03-01), Godard

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