Patent ID: 6208482
Filing Date: 2001-03-27
Classification: B82Y,G11B,H03F

Abstract:
A signal amplifying circuit for an MR element comprising:a plurality of MR elements, each MR element having first and second terminals,a first switching circuit for selectively supplying a current to one of the plurality of MR elements,a second switching circuit for selecting the MR element to which a current is selectively supplied, andan amplifier having first and second inputs for respectively receiving signals outputted from the first and second terminals of the MR element selected by the second switching circuit, wherein a signal is inputted into the first input of the amplifier from the first terminal of the MR element selected, through a first resistor, and signals are inputted into the second input of the amplifier from the first terminal of the MR element selected, through a second resistor and from the second terminal of the MR element selected, through a capacitor.