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. 03, 1995
Filed:
Oct. 07, 1993
Eiji Shinozaki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A driving circuit for a magnetic head incorporated in a disk memory system comprises a signal source unit for producing a pair of primary driving pulse signals complementary to each other, a level shifter for producing a pair of secondary driving pulse signals complementary to each other, a switching network responsive to the primary and secondary driving pulse signals for alternating the direction of current flowing into the magnetic head and a controller operative to detect the leading edge of one of the primary driving pulse signals for providing an auxiliary current path in every transient period for changing the direction of current, and the switching network is implemented a bridge circuit, i.e., four bipolar transistors respectively responsive to the primary and secondary driving pulse signals, wherein the auxiliary current path allows one of the secondary driving pulse signals to be temporally pulled down for keeping the associated bipolar transistor off against a positive going flyback pulse, thereby decreasing the current consumption without sacrifice of the switching speed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile