Disk drive with preamplifier with isolation for multiple readers in a slider with a common return signal
US9218822B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2015 |
| Grant date | Dec 22, 2015 |
| Priority date | — |
| Expiry date | May 13, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Interconnect and preamplifier designs are described for use in a disk drive with a common signal return lead system that interconnects a plurality of read transducers (readers) in a slider through the suspension to the preamplifier mounted on the actuator. Preamplifier embodiments have an isolated differential amplifier for each of the plurality of readers in the slider. The set of signal traces in the suspension include a common signal return lead for the plurality of readers in the slider. A preamplifier circuit design according to an embodiment of the invention includes isolated amplifiers for each reader with a separate bias source and power supply isolation elements for both power supply polarities for reduced crosstalk signal and noise between amplifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.