Correction Circuit for Output Duty of Hall Element, Hall Sensor and Method of Correcting Output Duty of Hall Element
First Claim
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1. A correction circuit for output duty of a Hall element, the correction circit comprising:
- an amplification and output unit for amplifying an output of the Hall element and outputting a sqaure wave signal;
a duty detection unit for detecting a duty ratio of the sqaure wave signal output by the amplification and output unit; and
a duty correction unit for applying a feedback correction signal to the amplification and output unit accoring to the detected duty ratio.
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Abstract
Disclosed herein are a correction circuit for output duty of a Hall element, a Hall sensor, and a method of correcting the output duty of the Hall element. According to an exemplary embodiment of the present invention, the correction circuit includes an amplification and output unit for amplifying an output of the Hall element and outputting a sqaure wave signal; a duty detection unit for detecting a duty ratio of the sqaure wave signal output by the amplification and output unit; and a duty correction unit for applying a feedback correction signal to the amplification and output unit accoring to the detected duty ratio.
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20 Claims
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1. A correction circuit for output duty of a Hall element, the correction circit comprising:
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an amplification and output unit for amplifying an output of the Hall element and outputting a sqaure wave signal; a duty detection unit for detecting a duty ratio of the sqaure wave signal output by the amplification and output unit; and a duty correction unit for applying a feedback correction signal to the amplification and output unit accoring to the detected duty ratio. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A Hall sensor comprising:
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a Hall element for outputting a voltag signal according to an approaching magnetic field signal; an amplification unit for analog-amplifying an output of the Hall element; a Shumitt trigger circuit for generating a sqaure wave signal from an output of the amplification unit according to a hysteresis section; a duty detection unit for detecting a duty ratio of the sqaure wave signal output by the Shumitt trigger circuit; and a duty correction unit for applying a feedback correction signal to the Shumitt trigger circuit accoring to the detected duty ratio. - View Dependent Claims (9, 10, 11, 12)
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13. A method of correcting output duty of a Hall element, the method comprising:
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an amplification and output operation of amplifying an output of the Hall element and outputting a sqaure wave signal; a duty detection oepration of detecting a duty ratio of the sqaure wave signal output in the amplification and output operation; and a duty correction operation of applying a duty ratio correction signal to the amplification and output operation accoring to the detected duty ratio. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification