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:
Aug. 22, 2000
Filed:
Apr. 25, 1997
Tyson Tuttle, Austin, TX (US);
Diwakar Vishakhadatta, Austin, TX (US);
Jerrel P Hein, Driftwood, TX (US);
David R Welland, Austin, TX (US);
David E Reed, Westminster, CO (US);
Richard T Behrens, Louisville, CO (US);
William G Bliss, Thornton, CO (US);
Paul M Romano, Boulder, CO (US);
Trent O Dudley, Littleton, CO (US);
Christopher P Zook, Longmont, CO (US);
Cirrus Logic, Inc., Fremont, CA (US);
Abstract
A sampled amplitude read channel is disclosed for reading data recorded on a disk storage medium by detecting an estimated binary sequence from a sequence of discrete time sample values generated by sampling pulses in an analog read signal from a read head positioned over the disk storage medium. The read channel comprises a sampling device, such as an analog-to-digital converter (A/D), for sampling the analog read signal to generate the discrete time sample values and for sampling at least one other auxillary analog input signal, such as a servo control signal. In this manner, performance characteristics of the read channel can be measured, such as the driving current applied to the servo control voice coil motor (VCM), without requiring additional hardware.