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. 03, 2013
Filed:
Nov. 29, 2010
Viswanath Annampedu, Schnecksville, PA (US);
Jeffrey P. Grundvig, Loveland, CO (US);
Keith R. Bloss, Schnecksville, PA (US);
Vishal Narielwala, Edina, MN (US);
Viswanath Annampedu, Schnecksville, PA (US);
Jeffrey P. Grundvig, Loveland, CO (US);
Keith R. Bloss, Schnecksville, PA (US);
Vishal Narielwala, Edina, MN (US);
LSI Corporation, San Jose, CA (US);
Abstract
Various embodiments of the present invention provide systems and methods for determining head polarity. As an example, a head polarity detection circuit includes: a first computation circuit, a second computation circuit, and an inversion determination circuit. The first computation circuit is operable to sum an absolute value of each sample of a first subset of a series of data samples corresponding to a first phase of an analog input to yield a first sum, and the second computation circuit is operable to sum an absolute value of each sample of a second subset of the series of data samples corresponding to a second phase of the analog input to yield a second sum. The first phase is more than ninety degrees offset from the second phase.