Patent ID: 9218822
Filing Date: 2015-12-22
Classification: G11B

Abstract:
1. A disk drive comprising: a slider with a plurality of read transducers that are each connected to a common return signal lead; a suspension with a set of electrically conductive signal traces that include a common return signal trace connected to the common return signal lead on the slider that is connected to all of the plurality of read transducers and a plurality of dedicated signal traces with each of the dedicated signal traces being connected to a corresponding read transducer; and a preamplifier connected to the set of signal traces on the suspension, the preamplifier having a plurality of amplifiers with each amplifier having an input from a corresponding one of the read transducers through the corresponding dedicated signal trace and being connected to the common return signal trace, the preamplifiers having a plurality of isolated amplifiers with isolated voltage bias sources with each amplifier being connected to a corresponding one of the isolated voltage bias sources, the preamplifier having a plurality of power supply isolation elements with each amplifier being connected to a first power supply voltage source through a corresponding first power supply isolation element and being connected to a second power supply voltage source through a corresponding second power supply isolation element.