Hall-effect gear tooth sensor IC (integrated circuit)

An integrated circuit, Hall effect technology, applied in the field of Hall effect gear sensor integrated circuits, can solve the problems of high cost, long detection distance, increased detection distance, etc., to achieve resistance to electromagnetic interference and radio frequency interference, wide operating voltage range, The effect of increasing sensitivity

CN102879019AActive Publication Date: 2013-01-16上海鑫雁微电子股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2013-01-16

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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.
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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...

Examples

Embodiment 1

[0021] Embodiment 1: as Figures 1 to 3 As shown, in this embodiment, the Hall gear sensor integrated circuit includes a reverse connection protection circuit 1 , a voltage stabilizing circuit 2 and a signal processing circuit 3 , and the reverse connection protection circuit 1 is connected to a power supply 12 . The signal processing circuit 3 includes a Hall voltage generator 6, a differential amplifier 7, a band-pass filter 8, a hysteresis comparator circuit 9, an open-collector output stage 10, a ground wire 11 and a power supply 12, and the band-pass filter 8 is a band gain bandpass filter circuit. The reverse connection protection circuit 1 provides reverse connection protection for the entire circuit, and the voltage stabilizing circuit 2 provides a stable working voltage and a wider voltage working range for the signal processing circuit 3 . The Hall voltage generator 6 utilizes the Hall effect of the material to induce the change of the strength of the applied magnet...