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:
Dec. 30, 1986
Filed:
Jun. 12, 1984
Toru Sekiguchi, Tokyo, JP;
NEC Corporation, , JP;
Abstract
A tape synchronizing apparatus for synchronizing tape addresses corresponding to tape locations of a tape which is being played back and reference addresses produced in the apparatus. The apparatus includes a capstan for rotating the tape at a controllable speed and a circuit for producing the tape addresses. The tape address generator circuit includes a circuit for detecting the direction of movement of the tape being played back, a shaping circuit for detecting a control signal from the tape which indicates each successive address and an up-down counter for producing the actual tape addresses. The reference addresses are produced in a reference address counter. The reference addresses are produced and updated at a rate corresponding to the frequency of a frequency reference. The clock rate of the frequency reference is adjustable by means of a frequency dividing circuit. The reference addresses and the tape addresses are compared and an acceleration or deceleration signal to the capstan driving means of the tape is generated for synchronizing the tape addresses with the reference addresses.