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. 15, 2003
Filed:
Dec. 18, 2001
James W. Rae, Rochester, MN (US);
William Bliss, Thornton, CO (US);
Jonathan Ashley, Los Gatos, CA (US);
Razmik Karabed, San Jose, CA (US);
Stephen J. Franck, Felton, CA (US);
Fritz Mistlberger, Bavaria, DE;
Matthias Driller, Santa Cruz, CA (US);
Heinrich Stockmanns, Santa Cruz, CA (US);
Dominik Margraf, Santa Cruz, CA (US);
Infineon Technologies North America Corp., San Jose, CA (US);
Abstract
An improved sampled amplitude read/write channel is provided. The system is an integrated Generalized Partial Response Maximum Likelihood (GPRML) read channel incorporating Read, Write, and Servo modes of operation. One implementation includes a 32/34 rate parity code and matched Viterbi detector, a 32 state Viterbi detector optimal parity processor, robust frame synchronization, self-adaptive equalization, thermal asperity detection and compensation, adaptive magneto-resistive asymmetry compensation, low latency interpolated timing recovery and programmable write precompensation.