Magnetic switch circuit for outputting vector length of magnetic field

Abstract

The present invention provides a magnetic switch circuit for outputting a vector length of a magnetic field, and relates to the field of magnetic field intensity detection circuit. The circuit comprises: an uniaxial magnetic sensor module comprising a plurality of uniaxial magnetic sensors, each uniaxial magnetic sensor being configured to output first preprocessing signals in a corresponding preset direction; an application specific integrated circuit connected with the uniaxial magnetic sensor module and configured to receive each first preprocessing signal and perform vector modulus processing and vector modulus solution and processing to obtain magnetic vector signals and a corresponding magnetic field vector length and output the magnetic vector signals and the corresponding magneticfield vector length. The magnetic switch circuit for outputting the vector length of the magnetic field measures one magnetic field intensity in each direction on the application specific integrated circuit and achieves vector modulus processing and vector modulus solution and processing on the application specific integrated circuit to obtain an accurate magnetic vector length, reduce the designdifficulty of the magnetic sensors in a traditional technology, simplify the process complexity of the magnetic sensors and effectively improve the yield rate.

Description

technical field [0001] The invention relates to the technical field of magnetic field strength detection circuits, in particular to a magnetic switch circuit for outputting the length of a magnetic field vector. Background technique [0002] 2D / 3D magnetic switches mostly use a single magnetic head to achieve magnetic field vector output, but are easily affected by the magnetic sensor process. [0003] For example, a traditional 2D / 3D magnetic switch uses a magnetic sensor for vector output, and then uses an ASIC (Application Specific Integrated Circuit, ASIC) to perform scalar processing on the length of the magnetic vector to obtain the magnitude of the magnetic vector (magnetic field vector length) and output it. Among them, a single-channel output mode is adopted between the magnetic sensor part and the ASIC part. Such 2D / 3D magnetic switches are easily affected by the magnetic sensor process. This leads to problems such as insufficient output accuracy and excessive te...

AI Technical Summary

Problems solved by technology

[0002] 2D / 3D magnetic switches mostly use a single magnetic head to achieve magnetic field vector output, but are easily affected by the magnetic sensor process

This kind of 2D / 3D magnetic switch is easily affected by the magnetic sensor process

Leading to problems such as insufficient output accuracy and excessive temperature drift

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