Circuit arrangement and a method for compensating changes of a transfer factor of a magnetic field sensor arrangement
US7224158B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 2004 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Apr 20, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/207
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a circuit configuration for compensating for the changes in a transfer ratio of a magnetic field sensor arrangement. According to one embodiment of the invention, a control loop for effecting this compensation is provided in the form of an integrated circuit whereby the change in transfer ratio is compensated by means of a control signal variation. This circuit configuration includes a series configuration of an A/D converter, a digital controller and a D/A converter exhibiting high precision and high control speed. A control that is significantly more precise and faster than that of the prior art is achieved by virtue of the fact that only a variable portion of regulating variables is fed through the digital controller after which a constant portion of regulating variables for the actual regulating variable used for compensation is added.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.