Title :
Integrated MR sensors for automobile
Author :
Akiyama, O. ; Konno, H. ; Inami, D. ; Kuraishi, Y.
Author_Institution :
2nd Transmission Div., NEC Corp., Kawasaki, Japan
fDate :
11/1/1994 12:00:00 AM
Abstract :
We have developed integrated MR sensors using not only bridge circuits but also an integrating technique with semiconductors. They have four or more elements used for a magnetoelectric transducer. Previously, such kind of integrated magnetic sensors used to have magnetoelectric transducers in the form of a bridge circuit by MR elements only. Hence, the amplitude of the sensor´s output solely depended on the magnetoresistance change ratio of the MR elements. The newly developed MR sensors are 3.7 times more effective than the conventional ones. By means of the NiFe thin film and the specific integrating technique, these new MR sensors show excellent temperature characteristics up to 150°C
Keywords :
Permalloy; automotive electronics; bipolar analogue integrated circuits; bridge circuits; electric sensing devices; magnetic sensors; magnetoresistive devices; 150 C; NiFe; NiFe thin film; automotive applications; bipolar transistor circuit; bridge circuits; current mirror circuit; high temperature environment; integrated magnetoresistive sensors; integrating technique; magnetoelectric transducer; magnetoresistance change ratio; output duty cycle; temperature characteristics; Automobiles; Bridge circuits; Magnetic semiconductors; Magnetic sensors; Magnetoresistance; Sensor phenomena and characterization; Temperature sensors; Thin film circuits; Thin film sensors; Transducers;
Journal_Title :
Magnetics, IEEE Transactions on