James Chiao - Saratoga CA Gary G. Kinoshita - San Jose CA
Assignee:
Quantum Corporation - Milpitas CA
International Classification:
H05K 111
US Classification:
361777
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.