Potentiometer, calibration method and calibration system of potentiometer as well as volume control device and electronic equipment

Abstract

The invention relates to a potentiometer, a calibration method and a calibration system of the potentiometer as well as a volume control device and electronic equipment. The potentiometer comprises a resistor body, a first pin, a second pin, a third pin, a fourth pin, a switch, a protective resistor and a movable electric brush, wherein the first pin is connected to the electric brush; the second pin is connected to one end of the resistor body; the third pin is connected to the other end of the resistor body; one end of the protective resistor is connected to the second pin; the other end of the protective resistor is respectively connected to one end of the switch and the fourth pin; the other end of the switch is connected to the third pin. Through the potentiometer, the influence of the residue resistance can be eliminated; when the potentiometer is applied to the volume control of the electronic equipment, the output volume is relatively more accurate.

Description

technical field [0001] The present invention relates to the field of electronic technology, in particular to a potentiometer, a potentiometer calibration method and system, a volume control device including the potentiometer, and electronic equipment including the volume control device. Background technique [0002] Potentiometer is an important electronic device widely used in electronic products. In the audio field, it is often used to control the output volume of electronic products. [0003] like figure 1 As shown, the current single potentiometer generally includes a movable arm, a contact brush, a resistor body and 3 pins, and the position of the contact brush can be changed by rotating the contact brush, thereby changing the figure 1 The size of the output voltage shown serves the purpose of adjusting the output volume of the electronic product. Multi-connected potentiometers usually have 3*n pins (n ​​represents the number of potentiometers). For example, a double...

AI Technical Summary

Problems solved by technology

[0004] But after the potentiometer has been used for a period of time, when the contact wiper is rotated to minimize the resistance value of the resistor between pin 1 and pin 3, the resistance value of the resistor between pin 1 and pin 3 should be It is 0 ohm, but due to the wear of the movable arm and the contact brush (the two are also collectively referred to as the brush), the resistance value changes from 0 ohm to greater than 0 ohm, and there will be a certain residual resistance

The output volume is obtained by collecting the output voltage of the potentiometer. Due to the existence of residual resistance, the output volume often becomes inaccurate.

Images