CIRCUIT APPARATUS FOR CHANGING CONTROL SPEED OF PHASE CONTROL CIRCUIT AUTOMATICALLY

PURPOSE: To generate a small time constant by providing the circuit device which gradually increases the control speed toward the center of a synchronous window within the range of the synchronous window and gradually decreases after the center is reached. CONSTITUTION: A circuit 13 is made to incre...

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Hauptverfasser:	UDO MAI, FURANTSU DEIITAARE, UBUE HARUTOMAN
Format:	Patent
Sprache:	eng
Schlagworte:	AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRONIC CIRCUITRY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:	PURPOSE: To generate a small time constant by providing the circuit device which gradually increases the control speed toward the center of a synchronous window within the range of the synchronous window and gradually decreases after the center is reached. CONSTITUTION: A circuit 13 is made to increase a control current from the edge to the center of the window and then decrease the amplitude from the center to the edge. In this case, the amplitude is switched, namely, the control speed is increased or decreased not stepwise, but gradually. Consequently, time windows 14 of two microseconds provided symmetrically about the center of, for example, a time window 10 are so set as to increase the control current by specific stages. Consequently, trouble in a synchronizing pulse period exerts disadvantageous influence on phase control operation and its control speed at neither the pulse edge nor the pulse center and a smaller time constant can be generated.