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Hall switch circuit

A Hall voltage and circuit technology, applied in electronic switches, electrical components, pulse technology, etc., to achieve the effect of solving the problem of high cost and realizing polarity detection

Active Publication Date: 2013-09-25
BEIJING JINGWEI HIRAIN TECH CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a Hall switch circuit to solve the problem of polarity detection at high cost in the prior art

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Embodiment Construction

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] The invention provides a Hall switch circuit to solve the problem of realizing polarity detection at high cost in the prior art.

[0055] Specifically, such as Figure 5 As shown, the Hall switch circuit includes:

[0056] Oscillator 101;

[0057] A control circuit 102 connected to the output of the oscillator 101;

[0058] An output module 103 connected to the control circuit 102;

[0059] A bias circuit 104 connected to the output module 103;

[...

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Abstract

The invention discloses a Hall switch circuit. A sampling clock signal is provided for a control circuit through an oscillator. The control circuit controls an output module to output a hysteresis control signal to a biasing circuit. The biasing circuit then outputs a hysteresis current signal and a supply voltage signal to a Hall disc circuit. Magnetic field intensity is sensed through the Hall disc circuit, and preliminary detuning removing is carried out. The Hall voltage output by the Hall disc circuit is received by a hysteresis comparator and is magnified. The control circuit controls the hysteresis comparator to carry out polarity detection and detuning removing. Finally, the output signal of the hysteresis comparator is converted to a digital signal to be output through the output module. According to the Hall switch circuit, whole polarity detection and detuning removing of a Hall switch are achieved by circuit matching of the modules, a polarity detecting circuit and a detuning processing circuit are of no need, and the problem that in the prior art, polarity detection is achieved with large cost is solved.

Description

technical field [0001] The invention relates to the technical field of Hall switches, in particular to a Hall switch circuit. Background technique [0002] Generally, Hall switches can be divided into unipolar, bipolar, and omnipolar switches. The unipolar switch detects only one polarity of the magnetic field (N pole or S pole), such as figure 1 The behavior curve of a unipolar Hall switch is shown. When the magnetic field changes from small to large and from large to small, the output flip points are different, respectively, the threshold B OP and B RP , this is to prevent the magnetic field from jittering near the threshold point, causing the output to jitter continuously, B in the figure HYS is the hysteresis size; a bipolar switch such as figure 2 As shown, two polar magnetic fields are needed to change the output state; an omnipolar magnetic field can detect both N pole and S pole at the same time, such as image 3 As shown, regardless of N pole or S pole magneti...

Claims

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Application Information

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IPC IPC(8): H03K17/90
Inventor 杨森林
Owner BEIJING JINGWEI HIRAIN TECH CO INC