Capstan controlling apparatus including capstan, supply side ree

Details Capstan controlling apparatus including capstan, supply side ree Capstan controlling apparatus including capstan, supply side ree

1991-05-13

1994-01-25

Westin, Edward P.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 103, 360 7308, G11B 15467

Patent

active

052820980

ABSTRACT:
A first frequency generator generates a first rotation detecting signal having a period which varies in accordance with a rotating speed of a capstan. Second and third frequency generators generate respective second and third rotation detecting signals having periods which vary in accordance with a rotating speed of a supply side reel and a winding side reel. A capstan speed comparison circuit generates an error in accordance with the periods of the first, second and third detecting signals and associated reference periods. A capstan drive circuit is controlled in accordance with the thus generated error.

REFERENCES:
patent: Re30939 (1982-05-01), d'Alayer de Costemore d'Arc et al.
patent: 4172231 (1979-10-01), d'Alayer de Costemore d'Arc et al.
patent: 4956730 (1990-09-01), Arai et al.
patent: 4985786 (1991-01-01), Arai et al.
patent: 4989112 (1991-01-01), Hamoda
Patent Abstracts of Japan, vol. 13, No. 57 (P-825) Feb. 9, 1989 & JP-A-63 247 946 (Matsushita) Oct. 14, 1988 * abstract *.
Patent Abstracts of Japan, vol. 9, No. 170 (P-373) Jul. 16, 1985 & JP-A-60 045 965 (Hitachi) Mar. 12, 1985 * abstract *.

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