Technology
The main classification of commonly used potentiometers
Synthetic membrane potentiometer
Synthetic membrane potentiometer is currently the most widely used potentiometer. Its resistor is made of carbon film, graphite, quartz powder and organic powder mixture to form a suspension, which is made on glass glazed fiber board and adhesive paper. It is made of various potentiometers, such as potentiometers with switches and precision potentiometers. This production process is relatively simple, and has the advantages of wide resistance range, high resolution, long life, low price, and many models.
Organic solid potentiometer
It is mainly made of carbon black, quartz powder, organic binder and other materials mixed and heated, and then pressed into the plastic body, which is formed by heating and polymerization. Digital and other potentiometers.
Metal film potentiometer
Metal film potentiometers include metal synthetic gold film, metal oxide film, tantalum oxide film and so on. The resistor body of this potentiometer is made of the above materials by vacuum technology deposited on the ceramic body. Heat resistance, high resolution, small contact resistance, small distributed capacitance and inductance, low noise and many other advantages.
Wire wound potentiometer
It is made by winding the resistance wire on the ring frame. Mainly have small resistance range, large power, good heat resistance, good stability, high accuracy, large distributed capacitance and inherent inductance, and low noise. The change in resistance is linear, and it is usually used in current circuits. Due to its large inductance, it is not suitable for high-frequency applications.
Digital potentiometer
Digital potentiometer is a kind of programmable resistor, it removes moving parts, is a semiconductor integrated circuit, high adjustment accuracy, no noise, long working life, no mechanical wear, data can be read and written, with configuration registers and data Register, multi-level storage function. Easy to control, small size and easy to assemble, suitable for household appliances, medical equipment, testing instruments and so on.
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