The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 1986
Filed:
Sep. 15, 1983
Applicant:
Inventor:
Stefan Kudelski, Le Mont-sur-Lausanne, CH;
Assignees:
Ampex Corporation, Redwood City, CA (US);
Kudelski S.A., Lausanne, CH;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318327 ; 318326 ; 318341 ; 318314 ; 318599 ;
Abstract
A control system for a motor which drives a tape capstan includes a capacitor (91) which holds a sample of a ramp signal which is sampled and restarted in response to tachometer pulses. The output of an amplifier (90, 100) which amplifies the difference between the stored voltage and a reference is integrated by a passive integrator (106, 92) coupled to the capacitor (91). The arrangement provides prediction of change of a discontinuous speed signal and is useful for slow running motors of low inertia.