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What is the Hall Effect (HALL)? Analysis of the working principle of Hall effect sensors

What is the Hall effect? Hall effect is the most common method for measuring magnetic fields and is a type of magneto electric effect. This phenomenon was discovered by A.H. Hall (1855-1938) in 1879 while studying the conductive mechanism of metals. Later, people discovered that semiconductors, conductive fluids, and other materials also have this effect, and the Hall effect of semiconductors is much stronger than that of metals. Various Heju Jin Hall devices made using the Hall effect have been widely used in industrial automation technology, detection technology, and information processing. The working principle of Hall effect sensors is analyzed. Hall effect sensor devices are divided into two categories: Hall elements and Hall integrated circuits (Hall ICs). The former is a simple Hall sensor that often requires amplification of the obtained Hall voltage during use; The latter integrates the Hall chip and its signal processing circuit on the same chip. Hall integrated circuits are products that have only emerged in the past 20 years with the development of the semiconductor integrated circuit industry. They have the advantages of small size, light weight, long lifespan, easy installation, low power consumption, high frequency, vibration resistance, no fear of dust and oil pollution, and low cost, and have been widely used. There are many other names for Hall Effect Integrated Circuit, such as Hall Effect IC, Hall Effect Sensor IC, Hall Sensor, Hall Circuit, etc. The following are collectively referred to as Hall ICs. Hall ICs are usually divided into digital Hall ICs and linear Hall ICs according to the type of output

signal. Digital Hall ICs control the output to turn on or off through the strength of an external magnetic field, similar to a switch, so they are often called switch type Hall ICs. Switch type Hall ICs are often divided into four categories: single-stage Hall ICs (Unipolar), lock-in Hall ICs (Latch), two-stage Hall ICs (Bipolar), and full stage Hall ICs (Omnipolar). Single stage Hall IC: only responds to a single magnetic pole (usually the S pole). When the S pole faces the marking surface and the applied magnetic induction intensity B exceeds the operating point (BOP) (i.e. B>BOP>0), the output is conductive and the output changes from high to low; When the magnetic induction intensity decreases below the release point (BRP) (i.e. 0BOP>0), the output is conductive and the output changes from high to low; When the magnetic induction intensity weakens until it is removed (B=0), the output remains conductive; When the N-pole faces the marking surface and the applied magnetic induction intensity exceeds the release point (BRP) (i.e. B『SILVER Official Website SERVICE』