Phase locked loop

Details Phase locked loop Phase locked loop

1975-03-10

1976-09-28

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307220R, 307233A, 331 25, H03B 304

Patent

active

039834972

ABSTRACT:
A signal frequency, controlled by the output of a phase comparator, is obtained from a constant or reference signal frequency source by means of a frequency divider, the division ratio of which is voltage-controlled and variable, the control signal being obtained from the output of the phase comparator, in digital, or analog form. When in analog form, a monostable multivibrator is interposed so that a voltage-controlled divider having a division ratio of an average, predetermined factor can be used. The signal, the frequency of which is to be identified, is applied as one input to the phase comparator for comparison with the output signal from the frequency divider, the comparison providing the aforementioned division control signal.

REFERENCES:
patent: 3337814 (1967-08-01), Brase et al.
patent: 3354403 (1967-11-01), Thomas
patent: 3611175 (1971-10-01), Buelke
patent: 3714589 (1973-01-01), Lewis
patent: 3781695 (1973-12-01), Jackson
patent: 3805192 (1974-04-01), Ocnaschek et al.
patent: 3849736 (1974-11-01), Enerson

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