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. 17, 2007
Filed:
Sep. 25, 2002
Applicants:
Edward Hin Pong Lee, San Jose, CA (US);
Robert Langland Smith, Sunnyvale, CA (US);
Inventors:
Edward Hin Pong Lee, San Jose, CA (US);
Robert Langland Smith, Sunnyvale, CA (US);
Assignee:
Hitachi Global Storage Technologies Netherlands, B.V., Amsterdam, NL;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/02 (2006.01); G11B 5/09 (2006.01); G11B 5/48 (2006.01); G11B 21/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A symmetrical read element circuit for reducing electrical and magnetic noise using signal processing, such as a differential preamplifier. The circuits are symmetrically created on both sides of the read element so that the noise is balanced on both leads of the sensor element allowing substantial noise reduction by the signal processing. That is, the present invention provides symmetrical leads and pads designed for equal noise pickup, and for cancellation of the balanced noise.