Automatic phase controlling circuit

Details Automatic phase controlling circuit Automatic phase controlling circuit

1989-09-12

1991-09-24

Miller, Stanley D.

Oscillators

Relaxation oscillators

331 25, 331 18, 328109, 307262, H03K 513, H03L 700

Patent

active

050517023

ABSTRACT:
An automatic phase controlling circuit according to the present invention has a phase shifter and an auxiliary detector for producing a sensitizing signal in association with a signal loop constituted by a main detector for producing a control signal and a voltage-controlled oscillator for producing a variable-phase signal, and the sensitizing signal is delayed in phase from the control signal by about 90 degrees by virtue of the phase shifter, so that the main detector achieves a stability around a phase difference of 0 degree without sacrifice of quick response characteristics at a large difference in phase between the variable-phase signal and a reference signal.

REFERENCES:
patent: 3465258 (1966-09-01), Wheatley, III
patent: 3621405 (1971-11-01), Carlsen
patent: 3787775 (1974-01-01), Lanning
patent: 3952261 (1976-04-01), Hara et al.

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