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:
Apr. 27, 1982
Filed:
Jan. 29, 1980
Masao Tomita, Neyagawa, JP;
Takenobu Isaka, Moriguchi, JP;
Mineo Mino, Hirakata, JP;
Kiyoji Fujisawa, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
A rotary head type magnetic tape recording/reproducing apparatus, by which a tracking condition of the reproducing heads and a recorded track can be automatically adjusted. This apparatus includes an oscillator for imparting small vibrations to the reproducing heads, a synchronous detector, an integration adder circuit including an adder and a delay circuit rotary heads mounted on a positionable element, and from the small vibrations. A tracking error signal which is derived by wobbling circuit is applied to the integration adder circuit, and the positionable element is controlled by the output signal of the integration adder means so as to construct a servo loop. Accordingly, proper tracking can be attained even for large tracking error.