Phase locked loop including phase detector system controlled by

Details Phase locked loop including phase detector system controlled by Phase locked loop including phase detector system controlled by

1980-01-09

1982-02-16

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

307511, 328133, 331 8, 331 14, 331 17, 331 27, H03L 708, H03K 526

Patent

active

043161502

ABSTRACT:
A second-order phase-locked loop circuit which does not require error voltage amplification is described. The output of a voltage controlled oscillator is accurately phase locked to a reference pulse. The loop phase detector is periodically enabled by a pulse generator and draws current only when enabled. Therefore very little noise may be coupled to the voltage controlled oscillator. The phase detector incorporates a current amplifier which allows very accurate establishment of the instant phase comparison takes place.

REFERENCES:
patent: 3813604 (1974-05-01), Denoncourt
patent: 4080576 (1978-03-01), Huber et al.
patent: 4222013 (1980-09-01), Bowers et al.
patent: 4244043 (1981-01-01), Fujita et al.

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