Digital servo circuit

Details Digital servo circuit Digital servo circuit

1983-06-27

1985-03-19

Dobeck, B.

Electricity: motive power systems

Positional servo systems

Digital or numerical systems

318341, 318599, G05B 1908

Patent

active

045062021

ABSTRACT:
A digital servo circuit which comprises a first N-bit counter for counting clock pulses at a recurrence frequency corresponding to error data and a second N-bit counter for counting divided recurrence frequency clock pulses at 1/M times the aforementioned recurrence frequency. The digital servo circuit controls the pull-in operation of a servo system with the count output of the second N-bit counter as control data, while it controls the operation of the servo system in the normal phase-locked state thereof with the count outputs of the first and second N-bit counters as control data with the count output of the second N-bit counter changed according to the amount of external disturbance caused to the servo system.

REFERENCES:
patent: 3872369 (1975-03-01), Rich
patent: 4101817 (1978-07-01), Maeda et al.
patent: 4315200 (1982-02-01), Yamada et al.
patent: 4366753 (1983-01-01), Glanz
patent: 4376914 (1983-03-01), Kimura

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