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. 19, 1994
Filed:
Dec. 17, 1992
Sho Sugiyama, Iruma, JP;
TEAC Corporation, Tokyo, JP;
Abstract
A magnetic transducer has its opposite coil extremities connected to a direct current power supply via a pair of inductance elements, respectively. The transducer coil is excited not only from the power supply but from the inductance elements as a write control circuit applies a binary write control signal, representative of digital information to be recorded, to a pair of semiconductor switches thereby causing the same to be alternately turned on and off. Being typically in the form of metal oxide semiconductor field effect transistors, the semiconductor switches permit the flow therethrough of a current of varying magnitudes when open. A pair of reverse blocking diodes are therefore connected in series with the respective semiconductor switches in order to make constant the current flowing through the transducer.