Working principle of Hall sensor Working principle of Hall sensor [pic] Hall sensor is a magnetic field sensor made based on the Hall effect. The Hall effect is a kind of magnetoelectric effect. This phenomenon was discovered by Hall (AH Hall, 1855-1938) in 1879 when studying the conductive mechanism of metals. Later, it was found that semiconductors, conductive fluids, etc. also have this effect, and the Hall effect of semiconductors is much stronger than that of metals. Various Hall elements made by this phenomenon are widely used in industrial automation technology, detection technology and information processing. The Hall effect is a basic method for studying the performance of semiconductor materials. The Hall coefficient measured by the Hall effect experiment can determine important parameters such as the conductivity type, carrier concentration and carrier mobility of semiconductor materials. The Hall effect passes a control current I at both ends of the semiconductor slice, and applies a uniform magnetic field with a magnetic induction intensity of B in the vertical direction of the slice. In the direction perpendicular to the current and magnetic field, a Hall voltage with a potential difference of UH will be generated [pic] Hall element According to the Hall effect, the element made of semiconductor materials is called a Hall element. It has the advantages of being sensitive to magnetic fields, simple structure, small size, wide frequency response, large output voltage change and long service life. Therefore, it is widely used in measurement, automation, computer and information technology. Classification of Hall sensors Hall sensors are divided into two types: linear Hall sensors and switch Hall sensors. (I) Linear Hall sensors are composed of Hall elements, linear amplifiers and emitter followers, and they output analog quantities. (II) Switch Hall sensors are composed of voltage regulators, Hall elements, differential amplifiers, Schmitt triggers and output stages, and they output digital quantities. Hall IC S-5711A Series SII\'s Hall IC is a high-sensitivity, low-current IC in a small package. It can detect the magnetism of both poles (N pole and S pole), and by combining with magnets, it can detect the on/off of various devices. The S-5711A series is a high-sensitivity, low-current Hall IC (magnetic switch IC) developed using CMOS technology. It can detect the strength of the magnetic flux density and change the output voltage. By combining with magnets, it can detect the on/off of various devices...
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