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. 26, 2025
Filed:
Dec. 07, 2023
Western Digital Technologies, Inc., San Jose, CA (US);
Richard Galbraith, Rochester, MN (US);
Pradhan Bellam, Rochester, MN (US);
Iouri Oboukhov, Rochester, MN (US);
Niranjay Ravindran, Rochester, MN (US);
Weldon Hanson, Rochester, MN (US);
Jonas Goode, Lake Forest, CA (US);
Western Digital Technologies, Inc., San Jose, CA (US);
Abstract
Example channel circuits, data storage devices, and methods for using zero force adaptation to equalize a read data signal based on known data are described. A known user data signal may be determined during prior read operations and used with a residue term from the equalized read data signal to adapt the tap weights for an equalizer filter using a zero force adaptation algorithm. For example, the known user data signal may be determined by a soft output detector (e.g., SOVA detector) or full or partial decoding by an iterative decoder (e.g., LDPC decoder) and fed back for adapting the equalizer.