Phase stability of non-sinusoidal signals utilizing two differential halls
US6777926B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 2002 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Aug 15, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for sensing the speed and direction of a rotating target is disclosed. A first differential Hall package can be generally located opposite to a second differential Hall package, wherein the first differential Hall package and second differential Hall package comprise mirror images of one another. A first output signal can then be generated by the first differential Hall package and a second output signal by the second differential Hall package during a rotation of the rotating target. The first Hall output signal can thus be compared to the second Hall output signal during a shift of the rotating target from a sinusoidal phase to a non-sinusoidal phase thereof, thereby permitting accurate phase information indicative of the speed and direction of the rotating target to be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.