Sampled data phase locking system

Details Sampled data phase locking system Sampled data phase locking system

1989-03-17

1989-11-28

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

307516, 328133, 328155, 331 14, 331 17, 331 27, 358 19, 358158, H03L 708, H03D 1300

Patent

active

048840408

ABSTRACT:
A phase locking system for providing a sampling signal which is to be phase/frequency locked to an applied signal includes a controllable oscillator coupled to a sampling circuit to produce samples of the applied signal representing substantially quadrature phase related components of the applied signal. An accumulator respectively accumulates the quadrature phase components over predetermined intervals. A differencing circuit successively forms the differences of one of the components from successive intervals. The differences are used to generate a control signal to alter the signal generated by the controllable oscillator.

REFERENCES:
patent: 4491862 (1985-01-01), Flamm

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