Method and apparatus for balanced shield shunts, leads and...

Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of the amplifier

Reexamination Certificate

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C360S046000, C360S246000

Reexamination Certificate

active

10254285

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.

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patent: 5508614 (1996-04-01), Garfunkel et al.
patent: 5805382 (1998-09-01), Lee et al.
patent: 6046876 (2000-04-01), Osafune et al.
patent: 6088235 (2000-07-01), Chiao et al.
patent: 6324036 (2001-11-01), Dill, Jr. et al.
patent: 6687074 (2004-02-01), Takahashi

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