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:
Apr. 11, 2006
Filed:
Mar. 29, 2004
Chad E. Mitchell, Kasson, MN (US);
Vicki L. Pipal, Rochester, MN (US);
Joey M. Poss, Rochester, MN (US);
Raymond A. Richetta, Rochester, MN (US);
Chad E. Mitchell, Kasson, MN (US);
Vicki L. Pipal, Rochester, MN (US);
Joey M. Poss, Rochester, MN (US);
Raymond A. Richetta, Rochester, MN (US);
Abstract
An apparatus for providing head amplitude characterization is disclosed. A DAC is used to apply known signals to a variable gain amplifier in the front end of a read channel. The signal is processed through the read channel and at the output of an ADC, the signal is read and used to determine the input channel amplitude. Knowing the amplitude of the two input signals, the ADC code spread and the two VGA gain codes, an equation is generated for determining the amplitude of a head.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile