The sensor circuit has a series or bridge-type structure, depending on its usage. In principle, the elements form one circuit on a single chip.
Series Circuit (with two elements)
Bridge-type Circuit (with four elements)
MR: Magnetoresistive element
The sensor circuit is configured with a combination of elements and a permanent magnet.
A bias-type sensor circuit can be used to detect magnetic media movement. Applications include magnetic pattern recognition sensors and rotation sensors.
A motion type sensor circuit can be used for linear or rotational potentiometers. Applications include angle sensors.
Bias type
Motion type
The output voltage/temperature characteristic depends on the carrier mobility/temperature characteristic. Therefore, the temperature coefficient is lower than that for the resistance/temperature characteristic by one digit.
Output Voltage/Temperature Characteristic
Principles of Magnetoresistive Elements
