Digital servo apparatus

Details Digital servo apparatus Digital servo apparatus

1978-09-18

1981-07-14

Dobeck, B.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318318, 318608, 318603, 360 70, G11B 2104

Patent

active

042789249

ABSTRACT:
Digital servo apparatus includes a counter adapted to count inputted reference clock pulses to display time data. The output of the counter is latched by a first tacho pulse (controlled signal) to a first latch circuit and the contents of the first latch circuit is transferred by a second tacho pulse to the second latch circuit and the present count data of the counter is latched to the first latch circuit. A discrimination circuit is adapted to discriminate whether or not a control signal is within a predetermined control amount, based on time difference data latched to the first and second latch circuits, and deliver an output signal corresponding to a predetermined control amount based on the result of discrimination.

REFERENCES:
patent: 4023085 (1977-05-01), Bishop et al.
patent: 4101817 (1978-07-01), Maeda et al.
patent: 4110674 (1978-08-01), Enomoto

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