High-resolution wide-range micromechanical potentiometer leading-out structure and variable resistance output method

Abstract

The invention provides a high-resolution wide-range micromechanical potentiometer leading-out structure and a variable resistance output method. A long-strip-shaped micro sliding plate with N contactpoints is adopted to enable the contact points to be located at different positions, and an electrostatic actuator is adopted to enable a certain contact point to be in contact short circuit with a metal strip and a resistor strip. And the resistance value between the output end of the parallel metal strip and the end point of the series resistor strip is continuously changed along with differentpositions of the contact contacts. According to the potentiometer leading-out structure, a plurality of micropotentiometers are connected in series, wide range is achieved, extremely high resistance control resolution is guaranteed, meanwhile, a micromechanical structure is adopted, parasitic capacitance is small, the size is small, online resistance adjustment can be achieved through control logic, and the potentiometer leading-out structure is suitable for various electronic circuits.

Description

technical field [0001] The invention belongs to the field of potentiometers, in particular to a high-resolution and wide-range micromechanical potentiometer lead-out structure and a variable resistance output method. Background technique [0002] The potentiometer is a resistive element with three terminals and the resistance value can be adjusted according to a certain change rule. A potentiometer usually consists of a resistor body and a movable brush. When the brush moves along the resistor body, a resistance value or voltage that has a certain relationship with the displacement is obtained at the output end. Potentiometers play an extremely important role in circuit systems. The traditional potentiometer has a large structure, and requires external force to rotate and adjust the tap to realize the change of resistance. Compared with traditional mechanical resistors, digital potentiometers use electronic switches to switch a tap of multiple series resistors to achieve ...

AI Technical Summary

Problems solved by technology

This kind of digital potentiometer has the advantages of small size, long working life, and no mechanical wear. However, the digital potentiometer also has disadvantages that cannot be ignored. For example, the adjustment accuracy of the resistance depends on the minimum resistance value on the series resistance network, which is difficult to adjust. The contradiction between large resistance range and high resistance adjustment accuracy, etc.

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