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ASIC processing circuit, offset voltage and low frequency noise removing circuit and threshold judgment circuit

A technology for processing circuits and offset voltages, applied in the field of microelectronics, can solve problems such as insufficient output accuracy, excessive temperature drift, and influence, and achieve the effects of improving product yield, simplifying process complexity, and reducing design difficulty

Inactive Publication Date: 2018-11-09
微传智能科技(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This implementation method is easily affected by the magnetic sensor process; resulting in insufficient output accuracy, excessive temperature drift, etc.

Method used

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  • ASIC processing circuit, offset voltage and low frequency noise removing circuit and threshold judgment circuit
  • ASIC processing circuit, offset voltage and low frequency noise removing circuit and threshold judgment circuit
  • ASIC processing circuit, offset voltage and low frequency noise removing circuit and threshold judgment circuit

Examples

Experimental program
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Effect test

Embodiment 1

[0096] see figure 1 , The invention discloses an ASIC processing circuit for outputting the length of a magnetic field vector, and the ASIC processing circuit includes: a low noise amplifier, a squarer, and an integrator.

[0097] The low noise amplifier is connected with at least one magnetic sensor, and is used for amplifying the weak output signal of the magnetic sensor.

[0098] The squarer is connected to the low noise amplifier, and is used to take the modulus of a single vector in the output signal of the low noise amplifier; here, the vector refers to the signal amplified by the low noise amplifier output by the single-axis magnetic sensor. Because two or three uniaxial magnetic sensors are arranged orthogonally, vector signals in two or three directions are formed. This group of vector signals (two-axis or three-axis) is amplified by the low-noise amplifier and then reaches the squarer. The modulus method is: |x| 2 +|y| 2 or |y| 2 +|z| 2 or |x| 2 +|y| 2 +|z| ...

Embodiment 2

[0103] An offset voltage and low-frequency noise removal circuit, the offset voltage and low-frequency noise removal circuit includes: a clock control circuit, a low-noise amplifier, a squarer, and an integrator.

[0104] The clock control circuit is used to realize clock control.

[0105] The low noise amplifier is connected with a clock control circuit to amplify the weak output signal of the magnetic sensor.

[0106] The squarer is connected to the low noise amplifier, and is used for moduloing a single vector in the output signal of the low noise amplifier.

[0107] The integrator is connected to the squarer, and is used for modulo-summing multiple vectors sent by the squarer, and finally outputs a magnetic vector signal.

[0108] The processing methods of the offset voltage and the low-frequency noise removal circuit include (the input data of each phase can be set by the ASIC circuit):

[0109] In phase 1 (Φ 1 ), switch through the circuit switch, and access the posit...

Embodiment 3

[0127] A threshold judging circuit, the threshold judging circuit comprising: a clock control circuit, a low noise amplifier, a squarer, an integrator, and a comparator;

[0128] The clock control circuit is used to realize clock control;

[0129] The low noise amplifier is connected to a clock control circuit to amplify the weak output signal of the magnetic sensor;

[0130] The squarer is connected to a low-noise amplifier for moduloing a single vector in the output signal of the low-noise amplifier;

[0131] The integrator is connected to the squarer, and is used for modulo summing a plurality of vectors sent by the squarer, and finally outputs a magnetic vector signal;

[0132] The comparator is connected to the integrator to compare the information delivered by the integrator;

[0133] The threshold judging circuit is used to compare whether the magnetic field vector exceeds a threshold.

[0134] As a preferred solution of the present invention, the processing method of ...

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Abstract

The invention discloses an ASIC processing circuit, an offset voltage and low frequency noise removing circuit and a threshold judgment circuit. The ASIC processing circuit comprises a low noise amplifier, a squarer and an integrator. The low noise amplifier is connected with at least one magnetic sensor and used for amplifying the weak output signal of the magnetic sensor. The squarer is connected with the low noise amplifier and used for taking modulus of the single vector of the output signal of the low noise amplifier. The integrator is connected with the squarer and used for solving modulus sum of multiple vectors transmitted by the squarer so as to finally output the magnetic vector signal. The design difficulty of the magnetic sensor can be reduced, the process complexity of the magnetic sensor can be simplified and the finished product yield rate can be effectively enhanced.

Description

technical field [0001] The invention belongs to the field of microelectronics technology, and relates to an ASIC processing circuit, in particular to an ASIC processing circuit for outputting a magnetic field vector length; at the same time, the invention also relates to an offset voltage and low-frequency noise removal circuit, and a threshold judgment circuit . Background technique [0002] 2D / 3D magnetic switches mostly use a single magnetic head to achieve magnetic field vector output, while traditional magnetic switches use magnetic vector sensors and perform scalar processing in the ASIC part. This implementation method is easily affected by the magnetic sensor process; resulting in insufficient output accuracy and excessive temperature drift. [0003] In view of this, there is an urgent need to design a new magnetic sensor processing circuit in order to overcome the above-mentioned defects existing in the existing processing circuit. Contents of the invention [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/00G01R33/02
CPCG01R33/0023G01R33/02
Inventor 郭鹏
Owner 微传智能科技(常州)有限公司