Phase and frequency detector and use of this detector in a phase

Details Phase and frequency detector and use of this detector in a phase Phase and frequency detector and use of this detector in a phase

1987-04-28

1988-12-20

Laroche, Eugene R.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 25, 331DIG2, 328134, 328155, 307516, H03L 700, H03L 706, H03K 526

Patent

active

047927674

ABSTRACT:
This phase and frequency detector, receiving two logic input signals R and V, comprises a set of 2k+2 memory cells, cascade arranged and linked in twos by 2K+1 control cells, capable especially of transferring the information contained in the changes of state of the signals R and V, from the end memory cells to which they are respectively applied, and by each of the directions respectively, to a memory cell MU.sub.n or MD.sub.n (depending on whether the signal R is ahead or delayed with respect to the signal V), this cell then giving square waves the duty factor of which is proportionate to the instantaneous phase shift .DELTA..phi. between the signals R and V, when (2.pi.-1)n<.vertline..DELTA..phi..vertline.<.pi..

REFERENCES:
patent: 4277754 (1981-07-01), Minakuchi
patent: 4473805 (1984-09-01), Guhn
patent: 4500852 (1985-02-01), Phillips

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