Pulse corrector for phase comparator inputs

Details Pulse corrector for phase comparator inputs Pulse corrector for phase comparator inputs

1983-12-16

1985-10-22

LaRoche, Eugene R.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 25, 331 27, 328133, 328134, 328155, 307516, H03L 710, H03D 1300, H03K 522

Patent

active

045491488

ABSTRACT:
A pulse corrector provides circuitry for responding to first and second input pulses applied to its first and second inputs to provide first and second output pulses at the first and second outputs respectively such that the first pulse edge occurring at the first output after an interruption of the first input pulses never leads the corresponding first pulse edge occurring at the second output irrespective of the phase relationship between the corresponding first pulse edges occurring at the inputs after the interruption. Circuitry is also provided to ensure that the duration of the pulse produced at the first output and starting with the aforementioned first edge is not substantially less than that of one of the first and second input pulses, thus ensuring that a phase detector connected to the outputs of the pulse corrector is placed in a predetermined neutral state by the aforementioned pulse edges such that both its outputs are activated before reference pulses are again allowed to contact its input.

REFERENCES:
patent: 4017806 (1977-04-01), Rogers
patent: 4326173 (1982-04-01), Newman
patent: 4365210 (1982-12-01), Harrington et al.
patent: 4423520 (1983-12-01), Murayama et al.
Fairchild; "Phase/Frequency Detector 11C00 Series" 1975 Fairchild Semiconductor Components Data Sheets.

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