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Electronic potentiometer resistance characteristics

Date:2018-06-08 16:21:20        Hits:167 
        The electronic potentiometer is an adjustable electronic component consisting of a resistor

body and a rotating or sliding system. When the movable arm is displaced, the brush slides on the

resistor body, and the resistance between the brush and the output terminal can be changed. There

are many types of potentiometers, and they are widely used in life: wire wound potentiometers, carbon

film potentiometers, and potentiometers with switches.

 
       The main parameters of the electronic potentiometer in addition to the nominal maximum resistance

and rated power, as well as resistance changes, refer to the relationship between the resistance value changes

with the brush's rotation angle or sliding displacement. Common potentiometer resistance change characteristics

are linear (also known as X-type), exponential (also known as inverted logarithmic or Z-type), logarithmic (C-type)

three. The three types of potentiometer resistance curves are shown in Figure 1-4. The Y coordinate in the figure

indicates the actual value of the resistance and the total resistance value of the potentiometer at any angle (within the adjustable angle range).

The X coordinate is the percentage of the adjustable maximum angle and the maximum displacement.
X-type potentiometerexponential potentiometerlogarithmic potentiometer


The resistance of the linear characteristic potentiometer changes linearly with the rotation angle. This shows

that the conductive material on the resistor body is uniform, and the resistance of any brush displacement is

equal. Because of this characteristic, it is suitable for some requirements that require uniform adjustment, such

as voltage divider, bias current adjustment, and other products, also known as electronic volume potentiometer.

The exponential potentiometer has a small change in resistance when the brush is displaced and changes significantly

when the angle is close to the maximum angle. The human ear can feel a slight change in the small sound, but after the

sound reaches a certain level, even if the sound power increases, our ears do not feel the size of the change. This type

of potentiometer is suitable for volume control. Using this potentiometer for volume control, the relationship between volume and

potentiometer rotation angle is approximately linear. The logarithmic characteristic potentiometer has a resistance change that is

the opposite of the exponential type. The resistance value changes greatly when it starts to rotate, and the resistance value changes

slowly when the rotation angle is close to the maximum value. It is commonly used in medical Liaoning equipment for precise control.
         
         Through the introduction of potentiometer manufacturers' resistance characteristics of electronic potentiometers, we have more

clear application and performance. If you have the ordering and customization needs of the product, you can contact the company's

electronics factory
. We have 14 years experience in the production of potentiometers, and the original source factory has guaranteed quality.

Potentiometer Service Hotline +86 752-6902927 Technical Telephone +8613392015160.