Frequency counter-locked-loop apparatus for controlling digitall

Details Frequency counter-locked-loop apparatus for controlling digitall Frequency counter-locked-loop apparatus for controlling digitall

1988-08-01

1990-06-26

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Systems

Comparing counts

377 54, 377 55, 328 55, 328 61, 331 1A, H03L 718, H03K 3027

Patent

active

049378465

ABSTRACT:
Frequency counter-locked-loop apparatus for controlling digitally programmable oscillators includes an arrangement for locking the output frequency of the oscillator to an accurate frequency reference. Frequency, reference and delay registers, a counter and a comparator are configured in a feedback path from the output of the oscillator to its input for continuous control of the output frequency.

REFERENCES:
patent: 3657658 (1972-04-01), Kubo
patent: 3660842 (1972-05-01), Ballantyne
patent: 3670151 (1972-06-01), Lindsay et al.
patent: 3878370 (1975-04-01), Santomango et al.
patent: 4330751 (1982-05-01), Swain

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