Magnetic detector
AssigneeAichi Steel Corporation
InventorsShiori ITABUCHI, Takeshi KAWANO
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Abstract
A magnetic detector includes: a magneto-impedance sensor element including a magnetosensitive body configured to cause a magnetization change in response to a strength of a magnetic field when an excitation current is supplied to this body, and a detection coil wound around the magnetosensitive body and configured to output an induced voltage generated by the magnetization change in the magnetosensitive body; a sample hold circuit connected to one end of the detection coil and is configured to hold an output voltage of the detection coil when a sampling switch is tuned on; an amplifier circuit connected to an output side of the sample hold circuit; and a post-stage high-pass filter connected to an output side of the amplifier circuit.
Claims8
A magnetic detector comprising:
- a magneto-impedance sensor element including a magnetosensitive body configured to cause a magnetization change in response to a strength of a magnetic field when an excitation current is supplied thereto, and a detection coil wound around the magnetosensitive body and configured to output an induced voltage generated by the magnetization change in the magnetosensitive body;
- a sample hold circuit connected to one end of the detection coil and configured to hold an output voltage of the detection coil during turning on a sampling switch;
- an amplifier circuit connected to an output side of the sample hold circuit;
- and
- a post-stage high-pass filter connected to an output side of the amplifier circuit.
Dependencies are inferred from the claim text.