EMI noise cancellation in disk drive having MR read head and sin

Details EMI noise cancellation in disk drive having MR read head and sin EMI noise cancellation in disk drive having MR read head and sin

1997-10-27

2000-07-11

Picard, Leo P.

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

361683, 361684, 361686, 333 12, 366 9801, 174117FF, H05K 111

Patent

active

060882352

ABSTRACT:
Magnetic noise cancellation in a single-ended MR preamplifier front end is achieved by forming a balanced ground return path in a flex circuit connecting an MR head to the front end of the preamplifier. The balanced ground return path introduces a noise current in the opposite direction of the original noise current as viewed at the signal input pins of the preamplifier chip. In this manner common mode rejection of the radiated noise component is restored in the single-ended MR preamplifier circuit arrangement.

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