DC-offset adjustment for balanced embedded contact sensor
US8804263B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2013 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Aug 30, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/607
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embedded contact sensor controls for use in arm electronics (AE) in a disk drive are described that provide for removing undesirable offsets between the measured voltage across the ECS resistor in the slider and the balance resistor in ECS amplifier in the arm electronics (AE), which allows increased amplification of the resulting adjusted signal without saturation. Embodiments include a Zero-Offset Circuit, which can be activated periodically or on demand to sample and hold the present DC offset voltage in the ECS amplifier signal and subtract the DC offset voltage from ECS amplifier signal. The adjusted signal can then be further amplified without saturation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.