|
|
|
|
|
09/06/2008
 Email to a friend
 Comment on this article
|
A 3-D magnetic field sensor has been developed by the Fraunhofer Institute for Integrated Circuits IIS in Erlangen that can work without screening
.
Several sensors are arranged in a cell in such a way that they can measure all three components of a magnetic field in one place. If two such cells are placed on a chip, the sensor measures not only the magnetic field, but how it changes with position. According to IIS team leader, Dr Han-Peter Hohe, “This sensor enables us for the first time to identify magnetic interference fields as such and to separate them from the useful field. The sensor works perfectly even when the interference field is considerably larger than the useful field, there is therefore no need for shielding.”
Applications are seen in car mirrors and seats, in order to be able to move them to pre-set conditions chosen by individual drivers. The sensors detect where a magnet is in the mirror or seat in order that a motor can move it to the desired position.
The sensors are made using standard CMOS techniques and can be used at up to 150 deg C.
|
|
| |
Author
Tom Shelley
|
| |
| |
|
| |
This material is protected by Findlay Media copyright 2012.
See Terms and Conditions.
One-off usage is permitted but bulk copying is not.
For multiple copies contact the sales team.
|
| |
|
|
| |
To comment on news stories or blogs you need to complete our 60 second registration
process. Once completed this then allows you to download any and all white papers,
register for e-zines and access our detailed supplier directory for FREE.
If you are all ready a registered user then enter your e-mail address and login.
You will need to have logged in prior to entering your comments in the boxes provided.
|