AC-coupled sensor signal conditioning circuit
US6657476B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 2002 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Jul 9, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/09
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for minimizing errors in a sensor device due to signal amplitude variation are disclosed herein. A signal output from the sensor device is amplified and, thereafter, AC-coupled to a comparator such that the amplification and AC-coupling of the signal minimize offset shift-related errors associated with the sensor device. The signal can be coupled to eliminate offset shifts due to component mismatches, calibration, aging and/or temperature associated with the sensor device. An AC-coupled sensor signal conditioning circuit is utilized to amplify the signal through an amplifier and then AC-couple the signal to a comparator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.