Drive speed detector for a motor that drives a data reproducing

Details Drive speed detector for a motor that drives a data reproducing Drive speed detector for a motor that drives a data reproducing

1995-08-31

1998-01-27

O'Shea, Sandra L.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324166, 3242072, G01P 348

Patent

active

057125600

ABSTRACT:
A drive speed detector for a pickup feed motor including a detector for detecting the drive speed of the optical pickup feed motor by generating an AC signal with a frequency which is proportional to the drive speed of the optical pickup feed motor and a controller for controlling the sensitivity of the detecting means in order to uniform an amplitude level of the AC signal output from the detecting means.

REFERENCES:
patent: 4293814 (1981-10-01), Boyer
patent: 4305072 (1981-12-01), Makita
patent: 4966041 (1990-10-01), Miyazaki
patent: 5012207 (1991-04-01), Edwards
patent: 5532583 (1996-07-01), Davis et al.

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