Phase lock loop circuitry

Details Phase lock loop circuitry Phase lock loop circuitry

2006-03-28

2006-03-28

Sotomayor, John B. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Return signal controls external device

Missile or spacecraft guidance

C342S089000, C342S090000, C342S097000, C342S098000, C342S100000, C342S103000, C342S199000

Reexamination Certificate

active

07019684

ABSTRACT:
An arrangement for reducing the effect of vibration-induced changes in phase of the first local oscillator in a tracking receiver wherein final detection is accomplished by a synchronous detector in a phase lock loop incorporating a voltage-controlled oscillator is shown to include a differentiator providing a control signal whenever a vibration-induced change occurs, such control signal being applied to cause the time taken for the voltage-controlled oscillator to regain proper phase is reduced to a minimum.

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patent: 4228434 (1980-10-01), Williamson et al.
patent: 4672330 (1987-06-01), Floyd et al.

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