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Principles of digital potentiometers for components

fgfdj 於 2020-05-12 12:23:47 發表  |  累積瀏覽 463

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Digital potentiometer, also known as non-contact potentiometer, is a kind of digital sensor that detects the angle change of the rotating shaft, and feedbacks this angle change with multiple signal types.

Compared with mechanical potentiometers, digital potentiometers have the advantages of programmable change of effective electrical angle and output range, vibration resistance, low noise, and long life. Therefore, they have been successfully applied in many fields such as automatic detection and control, intelligent instruments and meters.

The advantages of digital potentiometers: high adjustment accuracy, no noise, extremely long working life, and no mechanical wear. It can be used for precise control of the angular position in the automatic control system, and can also use the characteristic that the output feedback signal is linearly proportional to the angle change to realize the output adjustment function by driving the rotating shaft.

The working principle of the digital potentiometer The digital potentiometer is composed of a resistor network and corresponding switches. The following figure shows the internal structure of the digital potentiometer.

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