Magnetic signal field sensor that is substantially immune to ang

Electricity: measuring and testing – Magnetic – Magnetometers

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

338 32R, G01R 3306

Patent

active

042963770

ABSTRACT:
Apparatus is provided for sensing an external magnetic field. This apparatus is comprised of first and second coplanar magnetoresistive elements, each magnetoresistive element having a main current conducting path and also having anisotropic resistance as a function of the direction of the resultant magnetic field applied thereto. First and second equal bias magnetic fields are supplied to the first and second magnetoresistive elements, respectively, these bias magnetic fields being supplied at different angles with respect to their associated magnetoresistive elements. In one embodiment, the current conducting paths of the magnetoresistive elements are perpendicular to each other, and the respective bias magnetic fields extend in opposite directions, these directions being parallel to one of the main current conducting paths. In another embodiment, the main current conducting paths of the respective magnetoresistive elements extend in the same direction, and the respective bias magnetic fields are at an angle of, for example .+-.45.degree. to these main current conducting paths. The first and second magnetoresistive elements are connected in series with each other, and a d.c. current is supplied to this series connection. An output signal representing the magnitude of an external magnetic field as supplied to the magnetoresistive elements is derived from the junction formed by the series-connected elements.

REFERENCES:
patent: 2997648 (1961-08-01), Bozorth
patent: 3405355 (1968-10-01), Hebbert
patent: 3518534 (1970-06-01), Bader
patent: 3546579 (1970-12-01), Paul et al.
patent: 3928836 (1975-12-01), Makino et al.
patent: 4021728 (1977-05-01), Makino et al.
patent: 4053829 (1977-10-01), Maruo
patent: 4079360 (1978-03-01), Ookubo et al.
Hebbert et al., "Thin Film Magnetoresistance Magnetometer", The Review of Scientific Instruments, vol. 37, No. 10, Oct. 1966, pp. 1321-1323.
Bate et al., "Magnetoresistive Read Heads", IBM Tech. Discl. Bull., vol. 17, No. 4, Sep. 1974, pp. 967-968.
Feng, J. S., "Self-Biased Magnetoresistive . . . ", IBM Tech. Discl. Bull., vol. 18, No. 11, Apr. 1976, pp. 3847-3851.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Magnetic signal field sensor that is substantially immune to ang does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic signal field sensor that is substantially immune to ang, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic signal field sensor that is substantially immune to ang will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1493512

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.