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:
Jun. 16, 2026
Filed:
Apr. 14, 2025
Avago Technologies International Sales Pte. Limited, Singapore, SG;
Avago Technologies International Sales Pte. Limited, Singapore, SG;
Abstract
Hard disk drives (HDD), preamplifiers for HDDs, and preamplifier circuits for HDDs. In an aspect, a preamplifier circuit might comprise one or more digital-to-analog converters (DAC) that can help reduce a thermal drift of a laser that assists in writing data to a storage medium of the HDD. A first DAC might skew a bias current between a laser power transducer and a temperature sensing transducer to reduce thermal drift. A second DAC might modify a differential current between two legs of the preamplifier circuit to further reduce thermal drift. In some cases, a calibration DAC can calibrate the output of the circuit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile