Servo control apparatus

Details Servo control apparatus Servo control apparatus

1981-07-23

1985-04-16

Dobeck, B.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318313, 318464, 318636, 318257, H02P 500

Patent

active

045118302

ABSTRACT:
A frequency-voltage converting system has a first sampler for sampling the input signal at a predetermined time interval, a second sampler for sampling the input signal after elapse of a predetermined time period from said predetermined sampling time, and comparator for comparing the sampled values obtained respectively from said first and second samplers and providing the difference of said sampled values as a value proportional to the frequency of said input signal.

REFERENCES:
patent: 3654479 (1972-04-01), Catherin
patent: 3885206 (1975-05-01), Hort
patent: 4061950 (1977-12-01), Kayanuma
patent: 4085577 (1978-04-01), Natori
patent: 4091314 (1978-05-01), Johnson
patent: 4177411 (1979-12-01), Takaoka
patent: 4211967 (1980-07-01), Akiyama et al.
patent: 4216419 (1980-08-01), van Dam
patent: 4238716 (1978-09-01), Redmond
patent: 4240014 (1980-12-01), Muller
patent: 4242619 (1980-12-01), Nakamura

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