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机械电位器和数字电位器比较

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Resistor potentiometers can be found in electronic cir-
cuits across a wide spectrum of applications. Most typ-
ically, they function in a voltage divider configuration in
order to execute various types of tasks, such as offset
or gain adjust. The two types of potentiometers com-
pared in this application note are the mechanical poten-
tiometer (also called a trimmer potentiometer) and the
digital potentiometer. The physical descriptions and cir-
cuit models of these two devices are shown in Figure 1.
AN219
Comparing Digital Potentiometers to Mechanical
Potentiometers

Author: Bonnie C. Baker, Earlier mechanical potentiometers were built by wrap-
Microchip Technology Inc. ping a resistive wire around a cylinder. With this con-
struction, the wiper moves from one winding to the
next. As the wiper is moved across the element, there
INTRODUCTION are discrete steps in resistance. Following this style of
Resistor potentiom……
机械电位器和数字电位器比较
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