ANALOG FRONT-END CIRCUIT AND CAMERA MODULE CONTROL DRIVER INCLUDING THE SAME
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United States of America Patent
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Jun 13, 2024
app pub date -
Dec 7, 2023
filing date -
Dec 7, 2022
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Abstract
An analog front-end circuit includes a hall bias correction loop circuit configured to correct a sensing voltage of a hall sensor by adjusting a hall bias current flowing in the hall sensor while tracking a change in the sensing voltage of the hall sensor based on a temperature change, an offset correction loop circuit configured to correct an offset correction voltage while tracking an offset change of the hall sensor and an offset change of an amplifier circuit based on the temperature change, the amplifier circuit configured to amplify and output the sensing voltage of the hall sensor, corrected through at least one of the hall bias correction loop circuit and the offset correction loop circuit, and an analog-digital converter configured to convert an output voltage of the amplifier circuit into sensing data and output the sensing data.
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