Title:
磁場を測定するためのセンサ及びそのセンサの調整方法
Document Type and Number:
Japanese Patent JP4347040
Kind Code:
B2
Abstract:
The sensor for measuring a magnetic field comprises a substrate (1), a first magnetic element (2), a second magnetic element (3), a third magnetic element (4) and a fourth magnetic element (5) in a bridge configuration on the substrate (1), a first bridge portion (8), wherein the first element (2) and the second element (3) are connected in series, and a second bridge portion (9), wherein the third element (4) and the fourth element (5) are connected in series, being situated between a first contact (6) and a second contact (7). The first bridge portion (8) comprises an electrical shunt resistor (10), which is arranged parallel to the first magnetic element (2) of the bridge and which has a temperature coefficient and is positive or negative in sign. In order to compensate for offset voltage and offset voltage drift in the output voltage of the bridge configuration, the temperature coefficient of the shunt resistor (10) compensates for the variation of the temperature coefficients of the magnetic elements (2, 3, 4, 5) in the bridge. The method of reducing offset voltage drift and offset voltage of the magnetic sensor includes steps whereby first the temperature coefficient of the bridge is compensated for by means of the shunt resistor (10) and, subsequently, the offset voltage is reduced to zero by means of a trimmer resistor (18).
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Inventors:
Joannes, B.A.D. Van, Dzong
Application Number:
JP2003500591A
Publication Date:
October 21, 2009
Filing Date:
May 29, 2002
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
G01R33/09; H01L43/06
Domestic Patent References:
| JP48057083U | ||||
| JP8503778A | ||||
| JP4042978A |
Foreign References:
| WO2000079298A1 |
Attorney, Agent or Firm:
Tadahiko Ito
Kenji Yoshitake
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki
Kenji Yoshitake
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki