Process and device for synchronizing two digital pulse sequences

Details Process and device for synchronizing two digital pulse sequences Process and device for synchronizing two digital pulse sequences

1992-06-08

1994-05-24

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

331 34, 331 57, H03L 7085, H03L 7099

Patent

active

053152719

ABSTRACT:
Device for synchronizing two constant high frequency digital pulse sequences S and R.sub.f comprising a first oscillator producing the frequency sequence R.sub.f at the fundamental frequency f and a second oscillator producing the frequency sequence of pulses S also at the frequency f. The second oscillator is a ring oscillator having three loops of inverted logic gates connected in series and corresponding respectively to the frequency f (used if synchronism exists), to a higher frequency f.sub.1 (used if there is a phase lag) and a lower frequency f.sub.2 (used if there is a phase lead) with the choice of the operating loop being made by a multiplexer on the basis of instructions from a phase detector permanently comparing the synchronism, lead or lag state of the sequence S compared with the sequence R.sub.f.

REFERENCES:
patent: 4121171 (1978-10-01), Schollmeier
patent: 4517532 (1985-05-01), Neidorff
patent: 5075640 (1991-12-01), Miyazawa

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