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:
Jul. 14, 1987
Filed:
Mar. 18, 1985
Applicant:
Inventor:
Hitoshi Senso, Saitama, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 50 ; 369111 ; 369240 ; 360 73 ;
Abstract
A low-cost recording disc rotary drive control apparatus having a simple circuit configuration employing no voltage divider or frequency-to-voltage converter. A position pulse signal with a period proportional to a position detecting signal produced by a position detecting device is generated, and a rotational pulse signal having a frequency proportional to the rate of rotation of the motor is generated. The supply of a control signal to the motor is effected while supply of an accelerating signal thereto is suspended using a switching device.