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. 23, 2002
Filed:
Sep. 28, 1999
Sanjay M. Bhandari, Santa Clara, CA (US);
David Allouche, Belmont, CA (US);
Dennis Pu, San Jose, CA (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A magnetic storage apparatus includes first and second control devices to effectively reduce a disturbance which occurs in a read channel of the apparatus upon transition from a write mode to a read mode. The first control device is in a first gain stage coupled to a read sensor. The second control device is a back-end circuit and, in addition to reducing the duration of the write-to-read disturbance, is effective to significantly reduce offset of the apparatus. A user interface in the form of a serial interface allows user programmability of both of the first and second control devices. The serial interface and the read channel with the first and second control devices are embodied in a pre-amplifier integrated circuit. The programmability affords flexibility to the IC manufacturer as well as to the manufacturer of the magnetic storage device in optimizing the read channel to account for model-to-model and unit-to-unit variations in the write-to-read disturbance.