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:
Sep. 28, 2004
Filed:
Oct. 29, 2001
Raymond Elijah Barnett, Apply Valley, MN (US);
Tuan Van Ngo, Eden Prairie, MN (US);
Scott Gary Sorenson, Lakeville, MN (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A write current circuit ( ) adapted to drive a thin film write head (L ) of a mass media information storage device. The write current circuit includes a write current reference voltage circuit ( ) adapted to selectively establish amplitude of a write current signal. The write current circuit further includes programming circuitry (M -M ) driven such that several parameters of the write current waveform can be controlled, including the write current amplitude, overshoot amplitude and overshoot duration. The present invention achieves technical advantages by providing the ability to both produce an accurate write current, and also providing the ability to establish the write current waveform shape so that customers can optimize disk drive performance even when using different thin film write heads available from different suppliers.