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US 6,208,482 B1Granted
Signal amplifying circuit for an MR element
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsYukihiro Araya, Takehiko Umeyama
Life of this patent
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Abstract
A signal amplifying circuit for an MR element in which a first terminal of a selected MR element is connected to input of an amplifier through a first resistor as well as to a second input of the amplifier through a second resistor, and a second terminal of the MR element is connected to the input of the amplifier through a capacitor. The effect of an offset voltage generated in the MR element can be suppressed to minimum with a simple configuration.
Claims7
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, and
- an 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.
1 more element
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, and
- an 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 second terminal of the MR element selected, through a first resistor, and signals are inputted into the second input of the amplifier from the second terminal of the MR element selected, through a second resistor and from the first terminal of the MR element selected, through a capacitor.
1 more element
Dependencies are inferred from the claim text.