CIRCUIT TO MINIMIZE LOCAL CLOCK FREQUENCY DISTURBANCES WHEN PHASE LOCKING TO A REFERENCE CLOCK CIRCUIT

TITLE CIRCUIT TO MINIMIZE LOCAL CLOCK FREQUENCY DISTURBANCES WHEN PHASE LOCKING TO A REFERENCE CLOCK CIRCUIT A frequency disturbance minimization circuit for use in a phase locked loop circuit. A pulse generator eliminates random phase shift, which occurs after a reference clock outage, by synchroni...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	MACRANDER, MAX S, EDWARDS, IVAN L, MCLAUGHLIN, ROBERT C
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRONIC CIRCUITRY ELECTRICITY
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	TITLE CIRCUIT TO MINIMIZE LOCAL CLOCK FREQUENCY DISTURBANCES WHEN PHASE LOCKING TO A REFERENCE CLOCK CIRCUIT A frequency disturbance minimization circuit for use in a phase locked loop circuit. A pulse generator eliminates random phase shift, which occurs after a reference clock outage, by synchronizing counted down derivatives of the local and reference clock circuits. A window circuit provides a signal representative of the difference in phase between these local and reference clock circuits. A counter accumulates these phase difference window signals for periodic interrogation by a microprocessor which causes a voltage controlled oscillator to adjust its frequency in the direction necessary to eliminate this phase difference.