Oscillators – Automatic frequency stabilization using a phase or frequency... – Afc with logic elements
Patent
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
Frances Michel
Lazarus Michel
"Thomson-CSF"
LaRoche Eugene R.
Mis David
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