Sync lock phase control

Claim 1

A DEVICE FOR CONTROLLING PHASE RELATIONSHIPS BETWEEN A RECEIVED SYNC SIGNAL OF PULSES OF FREQUENCY F AND A LOCALLY GENERATED SYNC SIGNAL OF THE SAME FREQUENCY TO BE USED FOR DERIVING TIME RELATIONSHIPS WITHIN SYNC GENERATOR APPARATUS COMPRISING: A PHASE DETECTOR CIRCUIT HAVING A FIRST INPUT CONNECTED TO SAID RECEIVED SYNC SIGNAL AND A SECOND INPUT CONNECTED TO SAID LOCALLY GENERATED SYNC SIGNAL AND YIELDING A SUBSTANTIALLY RECTANGULAR WAVE OUTPUT WHOSE AVERAGE VOLTAGE IS PROPORTIONAL TO THE DIFFERENCE IN PHASE BETWEEN SAID SYNC SIGNALS; A D.C. RESTORER CIRCUIT CAPACITOR COUPLED TO THE OUTPUT OF SAID PHASE DETECTOR, SAID RESTORER CIRCUIT INCLUDING MEANS FOR RECTIFYING SAID RECTANGULAR WAVE OUTPUT SO AS TO IMPOSE A D.C. POTENTIAL THEREON AND MAINTAIN ONE EXTREMITY OF THE SWING OF SAID OUTPUT VALVE AT A GIVEN D.C. POTENTIAL; A LOW PASS FILTER MEANS COUPLING THE OUTPUT OF SAID RESTORER TO A VOLTAGE CONTROLLED OSCILLATOR, SO AS TO PROVIDE CONTROL OVER THE FREQUENCY OF THE SAME, SAID VOLTAGE CONTROLED OSCILLATOR HAVING A NOMINAL CENTRE FREQUENCY NF, WHEREIN N IS A POSITIVE EVENT INTEGER; MEANS CONNECTING THE OUTPUT OF SAID OSCILLATOR TO A DIVIDED BY N FREQUENCY DIVIDER-PULSE SELECTOR CIRCUIT YIELDING TWO SERIES OF OUTPUT PULSES OF FREQUENCY F, THE FIRST SERIES CONSISTING OF EVERY NTH PULSE WHICH OCCURS AT APPROXIMATELY THE SAME TIME AS THE RECEIVED PULSES AND THE SECOND SERIES COMPRISING EVERY NTH PULSE WHICH OCCURS MIDWAY BETWEEN THE PULSES OF THE FIRST SERIES; MEANS CONNECTING SAID FIRST SERIES OF PULSES TO THE REMAINING PARTS OF SAID SYNC GENERATOR APPARATUS FOR CONTROLLING TIME RELATIONSHIPS THEREIN; AND FURTHER MEANS CONNECTING SAID SECOND SERIES OF PULSES TO SAID SECOND INPUT OF THE PHASE DETECTOR.

Claim 2

A DEVICE FOR CONTROLLING PHASE RELATIONSHIPS BETWEEN A RECEIVED SYNC SIGNAL OF PULSES OF FREQUENCY F AND A LOCALLY GENERATED SYNC SIGNAL OF THE SAME FREQUENCY TO BE USED FOR DERIVING TIME RELATIONSHIPS WITHIN SYNC GENERATOR APPARATUS COMPRISING: A PHASE DETECTOR CIRCUIT HAVING A FIRST INPUT CONNECTED TO SAID RECEIVED SYNC SIGNAL AND A SECOND INPUT CONNECTED TO SAID LOCALLY GENERATED SYNC SIGNAL AND YIELDING A SUBSTANTIALLY RECTANGULAR WAVE OUTPUT WHOSE AVERAGE VOLTAGE IS PROPORTIONAL TO THE DIFFERENCE IN PHASE BETWEEN SAID SYNC SIGNALS; A D.C. RESTORER CIRCUIT CAPACITOR COUPLED TO THE OUTPUT OF SAID PHASE DETECTOR, SAID RESTORER CIRCUIT INCLUDING MEANS FOR RECTIFYING SAID RECTANGULAR WAVE OUTPUT SO AS TO IMPOSE A D.C. POTENTIAL THEREON AND MAINTAIN ONE EXTREMITY OF THE SWING OF SAID OUTPUT VALVE AT A GIVEN D.C. POTENTIAL; A LOW PASS FILTER MEANS COUPLING THE OUTPUT OF SAID RESTORER TO A VOLTAGE CONTROLLED OSCILLATOR, SO AS TO PROVIDE CONTROL OVER THE FREQUENCY OF THE SAME, SAID VOLTAGE CONTROLED OSCILLATOR HAVING A NOMINAL CENTRE FREQUENCY NF, WHEREIN N IS A POSITIVE EVENT INTEGER; MEANS CONNECTING THE OUTPUT OF SAID OSCILLATOR TO A DIVIDED BY N FREQUENCY DIVIDER-PULSE SELECTOR CIRCUIT YIELDING TWO SERIES OF OUTPUT PULSES OF FREQUENCY F, THE FIRST SERIES CONSISTING OF EVERY NTH PULSE WHICH OCCURS AT APPROXIMATELY THE SAME TIME AS THE RECEIVED PULSES AND THE SECOND SERIES COMPRISING EVERY NTH PULSE WHICH OCCURS MIDWAY BETWEEN THE PULSES OF THE FIRST SERIES; MEANS CONNECTING SAID FIRST SERIES OF PULSES TO THE REMAINING PARTS OF SAID SYNC GENERATOR APPARATUS FOR CONTROLLING TIME RELATIONSHIPS THEREIN; AND FURTHER MEANS CONNECTING SAID SECOND SERIES OF PULSES TO SAID SECOND INPUT OF THE PHASE DETECTOR.