Hall-effect gear tooth sensor IC (integrated circuit)

Abstract

The invention relates to a Hall-effect gear tooth sensor IC, which is used in the fields of distance detection, speed detection, rotation speed detection and so on. The Hall-effect gear tooth sensor IC comprises a reverse protection circuit, a voltage stabilizing circuit and a signal processing circuit, wherein the reverse protection circuit is connected with a power supply; and the signal processing circuit is provided with a pin C+ and a pin C-. The signal processing circuit is characterized in that the signal processing circuit consists of a Hall voltage generator, a differential amplifier, a band-pass filter, a hysteresis comparator circuit, a open-collector output stage, a grounding wire and necessary connection circuits, wherein the Hall voltage generator, the differential amplifier, the band-pass filter, the hysteresis comparator circuit and the open-collector output stage are connected in sequence. The Hall-effect gear tooth sensor IC provided by the invention is simple in size, convenient in use, and has the advantages of high sensitivity, high reliability, high resistance to vibration, radio frequency and electromagnetic interference, and good consistency.

Description

technical field [0001] The invention relates to a Hall effect gear sensor integrated circuit, which is used in the fields of distance detection, speed detection, rotational speed detection and the like. Specifically, it can be used in automotive cam and crankshaft speed / position detection, automotive and industrial speedometers, automatic control, textile machinery and other fields. Background technique [0002] When the Hall effect gear sensor integrated circuit is used to detect ferromagnetic materials, a piece of magnetic steel needs to be pasted behind the IC. The existing Hall effect gear sensor integrated circuits in the market are all imported ICs, but the use does not fully satisfy the application convenience. , long detection distance, low cost and other requirements. For example, when IC UGN3060 is used, it often takes a long time to stick a piece of magnetic steel behind the IC to make the IC work normally, and the detection distance is relatively short, which un...

AI Technical Summary

Problems solved by technology

[0002] When the Hall effect gear sensor integrated circuit is used to detect ferromagnetic materials, a piece of magnetic steel needs to be pasted behind the IC. The existing Hall effect gear sensor integrated circuits in the market are all imported ICs, but the use does not fully satisfy the application convenience. , long detection distance, low cost and other requirements

For example, when IC UGN3060 is used, it often takes a long time to stick a piece of magnetic steel behind the IC to make the IC work normally, and the detection distance is relatively short, which undoubtedly increases the difficulty of application; for example, when using IC MLX90217, it takes a long time to stick a piece of magnetic steel behind the IC. Determine the polarity of the magnetic steel, but the detection distance is difficult to meet the increasing requirements, and the cost is high

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