CN-224232423-U - High-precision adjustable resistor

Abstract

The utility model discloses a high-precision adjustable resistor which comprises a plurality of series connection value selection resistor modules, wherein a plurality of resistors are arranged between an input end and an output end of each value selection resistor module in a series connection or parallel connection mode, the resistance of the value selection resistor module can be switched and adjusted in a grading manner between zero and the maximum level resistance through the switching and selecting of a selection switch, and the resistance adjusting ranges of the plurality of value selection resistor modules are arranged in a grading manner, so that the total resistance of the resistor can be accurately adjusted after the value selection is respectively switched for the plurality of value selection resistor modules. The high-precision adjustable resistor realizes higher-precision and faster resistance adjustment, thereby greatly improving the production efficiency.

Inventors

• Cao Duohao

Assignees

• 上海航嘉电子科技股份有限公司

Dates

Publication Date

20260512

Application Date

20241025

Claims (5)

1. 1. The high-precision adjustable resistor is characterized by comprising a plurality of value selecting resistor modules, wherein the value selecting resistor modules are connected in series; A plurality of resistors are arranged between the input end and the output end of each value selecting resistor module in a serial connection mode, and the resistance of the value selecting resistor module can be switched and regulated in a grading manner between zero and the maximum level resistance through the switching selection of a selection switch; The resistance adjustment ranges of the plurality of value selection resistor modules are arranged in a grading manner, so that the resistor can be accurately adjusted in total resistance after the value selection is respectively switched to the plurality of value selection resistor modules; The adjustable resistance of each value selecting resistor module is equally divided into ten stages from zero to the maximum resistance, namely zero, one stage, two stages, three stages, four stages, five stages, six stages, seven stages, eight stages and nine stages; The circuit comprises a value selecting resistor module, a main circuit, a short circuit and a switching circuit, wherein the main circuit is arranged between an input end and an output end of the value selecting resistor module, nine equivalent resistors are connected in series on the main circuit, and the resistance value of the resistor connected in series on the main circuit is one-level resistance value corresponding to the resistance value regulated by the value selecting resistor module; The short circuit is specifically configured in such a way that nine short circuit branch circuits are arranged between the input end and the output end of each value selecting resistor module, and resistors on one, two, three, four, five, six, seven, eight or nine main circuits can be respectively short-circuited, each short circuit branch circuit is serially provided with a selection switch, and when all the selection switches are not communicated and one of the selection switches is respectively selected to be communicated, the resistance of the value selecting resistor module is correspondingly one of ten resistances from zero level to nine level.
2. 2. The resistor of claim 1, wherein ten of the resistor-selecting modules are provided, and resistances of resistors serially connected to the main circuit in the ten resistor-selecting modules are respectively 0.1 Ω,1 Ω, 10 Ω, 100 Ω, 1kΩ, 10kΩ, 100kΩ, 1mΩ, 10mΩ, 100mΩ.
3. 3. The resistor of claim 1 wherein the selector switch is a toggle switch, a knob switch, a jumper cap, or a relay.
4. 4. The resistor of any one of claims 1 to 3 wherein the plurality of resistor modules are disposed on a PCB.
5. 5. The resistor of claim 4 wherein the resistor comprises an outer housing, the PCB is fixedly disposed in the outer housing, and the outer housing is filled with a potting compound.

Description

High-precision adjustable resistor Technical Field The present utility model relates to an electrical device, and more particularly to a resistor. Background An adjustable resistor, also known as a potentiometer, is an electrical component that can adjust the resistance value. The adjustable resistor in the prior art is generally composed of a resistor body and a movable contact (movable contact), the resistance value is changed by changing the position of the contact on the resistor body, and the adjustment can be realized through rotation or sliding control, so that the adjustable resistor has wide application in electronic circuits. There are many situations in our industrial production where it is necessary to use high precision resistive components for testing, production, etc., and conventional screw-on or sliding-type adjustable resistors have the following drawbacks in use: 1. Compared with the high-precision requirements of some industries, the precision of the resistance value is low, the adjustment error is large, and the precision value is difficult to adjust. 2. The value cannot be changed linearly when the resistance value is adjusted, so that complicated back and forth operation is brought to debugging, and the working efficiency and the working quality are influenced. Disclosure of utility model The utility model aims to solve the technical problem of providing a high-precision adjustable resistor, which realizes higher-precision and faster resistance adjustment, thereby greatly improving the production efficiency. In order to solve the technical problem, the utility model adopts the following technical scheme: a high-precision adjustable resistor comprises a plurality of value selecting resistor modules, wherein the value selecting resistor modules are connected in series; A plurality of resistors are arranged between the input end and the output end of each value selecting resistor module in a serial or parallel mode, and the resistance of the value selecting resistor module can be switched and regulated in a grading manner between zero and the maximum level resistance through the switching selection of a selection switch; The resistance adjustment ranges of the plurality of value selection resistor modules are arranged in a grading manner, so that the resistor can be accurately adjusted in total resistance after the value selection is respectively switched by the plurality of value selection resistor modules. Further, one value selecting resistor module is responsible for adjusting a number of steric hindrance value in the resistor resistance values, and the adjustable resistance value of each value selecting resistor module is equally divided into ten stages from zero to the maximum level resistance value, namely zero, one stage, two stages, three stages, four stages, five stages, six stages, seven stages, eight stages and nine stages. Further, ten sub-circuits are arranged between the input end and the output end of the value selecting resistor module in a parallel mode, one sub-circuit is not provided with a resistor, the other nine sub-circuits are respectively connected with resistors with different resistance values in series, the resistance values of the resistors on the nine sub-circuits are respectively one-level to nine-level resistance values of the numerical blocking value regulated by the value selecting resistor module, each sub-circuit is provided with a selection switch, and one of the ten sub-circuits is selectively connected through the selection switch, so that the resistance value of the value selecting resistor module is one of ten resistance values from zero level to nine level. Further, the resistor is provided with ten value-selecting resistor modules, and the maximum level resistance values of the ten value-selecting resistor modules are respectively 0.9Ω,9Ω, 90Ω, 900 Ω, 9kΩ, 90kΩ, 900kΩ, 9mΩ, 90mΩ, 900mΩ. Furthermore, a main circuit is arranged between the input end and the output end of the value selecting resistor module, nine equivalent resistors are arranged on the main circuit in series, the resistance value of the resistor connected on the main circuit in series is a first-level resistance value corresponding to the resistance value regulated by the value selecting resistor module, meanwhile, the value selecting resistor module is also provided with a short circuit, and the resistor connected on the main circuit in series or one or more series resistors connected on the main circuit in short circuit can be switched and selected through the selection switch, so that the resistance value of the value selecting resistor module is one of ten resistance values from zero level to nine level. Further, the short circuit is specifically configured that nine short circuit branch circuits are arranged between the input end and the output end of each value selecting resistor module, and the resistors on the main circuit can be respectively short-circuited, namely one,