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Apparatus for providing bias current to hall sensor

A Hall sensor and bias current technology, applied in the direction of using electrical devices, electromagnetic measuring devices, converting sensor output, etc., can solve the problem of reducing the accuracy of Hall sensors

Pending Publication Date: 2022-01-04
SAMSUNG ELECTRO MECHANICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Since the output voltage of the Hall sensor may slightly change according to the temperature of the Hall sensor, and the change of the output voltage according to the temperature of the Hall sensor is basically independent of the position of the lens module, the temperature change of the Hall sensor may reduce the Hall The accuracy of the correspondence between the output voltage of the sensor and the position information of the lens module

Method used

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  • Apparatus for providing bias current to hall sensor
  • Apparatus for providing bias current to hall sensor
  • Apparatus for providing bias current to hall sensor

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Embodiment Construction

[0039] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices and / or systems described in this application. However, various changes, modifications and equivalents of the methods, apparatuses and / or systems described herein will be apparent upon understanding the disclosure herein. For example, the order of operations described in this application are examples only, and are not limited to the order set forth in this application, except for operations that must occur in a specific order, but can be implemented after understanding the disclosure of this application. Make visible changes. In addition, descriptions of features that are known in the art may be omitted for increased clarity and conciseness.

[0040] The features described in this application may be implemented in different forms and should not be construed as limited to the examples described in this application. Rather, the examples described i...

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Abstract

An apparatus for providing a bias current to a hall sensor includes: a bias provider configured to provide the bias current to the hall sensor; and a processor configured to produce a bias current control value based on a node voltage between the hall sensor and the bias provider, wherein the bias provider is configured to vary the bias current based on the bias current control value.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to Korean Patent Application No. 10-2020-0073543 filed with the Korean Intellectual Property Office on June 17, 2020, the entire disclosure of which is incorporated by reference into this application for all purposes . technical field [0003] The following description relates to means for supplying a bias current to a Hall sensor. Background technique [0004] Generally, when the lens module moves according to a force received from an external source, a technique for externally fixing the relative position of the lens module is widely used. [0005] For example, an optical image stabilizer (OIS) may be configured to fix the position of the lens module inside the camera module even when external force is applied to the camera module. [0006] The Hall sensor may be used to measure position information of the lens module, and may output a voltage that varies according to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/00G02B7/02G03B5/00
CPCG01B7/003G02B7/02G03B5/00G02B27/646G01R33/072G01R33/0082G01R33/0041G01R33/0023G01D5/142G03B2205/0007G03B2217/005G01D5/145G01D5/147G01D11/245G01R33/07G01R33/077
Inventor 文耀燮
Owner SAMSUNG ELECTRO MECHANICS CO LTD