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:
Oct. 25, 1988
Filed:
Sep. 28, 1987
Ken Miyazaki, Yokohama, JP;
Keiichi Kaneko, Yokohama, JP;
Abstract
A high density signal recording and reproducing apparatus comprises a disc drive comprising for recording and reproducing with an existing recording format a digital signal on and from a disc rotating at a rotational speed which is 1/N times a standard rotational speed, a circuit for generating N index pulses in one revolution time period of the disc, a selecting circuit for generating a selecting instruction which selects and designates an arbitrary track part on and from which the digital signal is to be recorded and reproduced out of N track parts of one track, a circuit responsive to the selecting instruction for generating a switching signal and an operation stop signal for stopping a recording or reproducing operation of the disc drive during a scanning period in which the remaining N-1 track parts excluding the arbitrary track part are scanned, and for passing out of the N index pulses in one revolution time period of the disc only one index pulse corresponding to the arbitrary track part, and a circuit responsive to the switching signal for selectively passing and supplying the reproduced digital signal to the selecting circuit only during a time period in which the digital signal is reproduced from the arbitrary track part.