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. 29, 2009
Filed:
Jun. 02, 2006
Daniel J. Dolan, Cottage Grove, MN (US);
David W. Kelly, Lino Lakes, MN (US);
Stephen C. Kuehne, Rosemount, MN (US);
Nathan M. Rudd, Hastings, MN (US);
Ross S. Wilson, Menlo Park, CA (US);
Daniel J. Dolan, Cottage Grove, MN (US);
David W. Kelly, Lino Lakes, MN (US);
Stephen C. Kuehne, Rosemount, MN (US);
Nathan M. Rudd, Hastings, MN (US);
Ross S. Wilson, Menlo Park, CA (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
A (e.g., hard-disk drive (HD)) system supports reader standby mode and/or writer standby mode. For reader standby mode, reader circuitry in the system's preamplifier is transitioned to a low-power mode during write operations. To provide quick transition from write mode to read mode, the reader circuitry is transitioned to pre-read mode before the end of the write operation. For writer standby mode, the preamplifier's writer circuitry is transitioned to a low-power mode during read operations. To provide quick transition from read mode to write mode, the writer circuitry is transitioned to a pre-write mode before the end of the read operation. The availability of a reader standby mode during write operations and a writer standby mode during read operations reduces power consumption as compared to HD systems that leave the reader circuitry in pre-read mode throughout each write operation and the writer circuitry in pre-write mode throughout each read operation.