Method and apparatus for balanced shield shunts, leads and pads for electrical noise reduction in read heads
US7206154B2 · kind B2 · utility
4Cited by
8References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2002 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Mar 4, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.