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:
Jan. 06, 1987
Filed:
Oct. 04, 1983
Tokikazu Matsumoto, Osaka, JP;
Kouichi Igata, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
In a tape recorder, when a magnetic tape changes its transportation speed for special reproduction, either one of a phase reference signal and a magnetic tape transportation phase signal representing the transportation phase of the magnetic tape is delayed by a delay circuit so that the signal not passing therethrough is compared with that having passed through the delay circuit, at which time the delay time of delay circuit is changed corresponding to the transportion speed of the magnetic tape so as to carry out phase control, thereby obtaining the optimum tracking in the reverse normal, double, and triple speed reproduction modes.