Digital phase lock loop for TIM frequency

Details Digital phase lock loop for TIM frequency Digital phase lock loop for TIM frequency

1979-09-27

1982-10-12

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

328133, 328155, 331 14, 331 16, 331 25, H03L 708

Patent

active

043541640

ABSTRACT:
A phase lock loop for a frequency synthesizer operating by counting different frequencies to a common fixed number to generate different time bases. An error signal is generated by counting bits of a first frequency over a given count relative to bits received at a second reference frequency. If an error occurs, a programmed frequency change takes place, otherwise the synthesizer is maintained at the programmed center frequency. Error detection resumes with a new counting period determined by the programmed change.

REFERENCES:
patent: 3731219 (1973-05-01), Mader et al.
patent: 3983498 (1976-09-01), Malek
patent: 4024460 (1977-05-01), Vifiau
patent: 4105947 (1978-08-01), Crowley

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