CN-224217305-U - Resistor structure and electronic device

Abstract

The utility model discloses a resistor structure and an electronic device, wherein the resistor structure comprises an alloy resistor and a thermistor, the alloy resistor and the thermistor are connected in parallel, the resistance value of the alloy resistor is R0, the resistance value of the thermistor is R1, R1 is more than or equal to 1000 x R0, and the positive and negative of the temperature drift coefficient of the alloy resistor are opposite to the positive and negative of the temperature drift coefficient of the thermistor, so that the temperature drift problem of the alloy resistor can be solved.

Inventors

• LI ZHIDE
• YUE WENKAI
• SHENG WENWEN
• ZENG QINGYU

Assignees

• 深圳市业展电子有限公司

Dates

Publication Date

20260508

Application Date

20250417

Claims (10)

1. 1. The resistor structure is characterized by comprising an alloy resistor and a thermistor, wherein the alloy resistor and the thermistor are connected in parallel; wherein the resistance value of the alloy resistor is R0, the resistance value of the thermistor is R1, and R1 is more than or equal to 1000R 0; The positive and negative of the temperature drift coefficient of the alloy resistor are opposite to the positive and negative of the temperature drift coefficient of the thermistor.
2. 2. The resistor structure of claim 1, wherein when the alloy resistor is an alloy resistor having a positive temperature coefficient, the thermistor is a thermistor having a negative temperature coefficient.
3. 3. The resistor structure of claim 1, wherein the thermistor is a positive temperature coefficient thermistor when the alloy resistor is a negative temperature coefficient alloy resistor.
4. 4. The resistor structure of claim 1, wherein the alloy resistor and the thermistor are in close proximity, and an insulator is disposed between the alloy resistor and the thermistor.
5. 5. The resistor structure of claim 4, wherein the thermistor extends in a transverse direction, a first connecting piece is connected to an upper side of the thermistor, and a second connecting piece is connected to a lower side of the thermistor; The alloy resistor extends transversely and is arranged below the thermistor, and the insulating piece is arranged between the second connecting piece and the alloy resistor; The first connecting piece is connected with one side of the alloy resistor along the transverse direction, and the second connecting piece is connected with the other side of the alloy resistor along the transverse direction.
6. 6. The resistor structure of claim 4, wherein the thermistor extends in a lateral direction, a first connecting piece is connected to a lower side of the thermistor, and a second connecting piece is connected to an upper side of the thermistor; The alloy resistor extends transversely and is arranged above the thermistor, and the insulating piece is arranged between the second connecting piece and the alloy resistor; The first connecting piece is connected with one side of the alloy resistor along the transverse direction, and the second connecting piece is connected with the other side of the alloy resistor along the transverse direction.
7. 7. The resistor structure of claim 6, wherein the alloy resistor and the first connector define a mounting cavity; the thermistor is accommodated in the installation cavity.
8. 8. The resistor structure of claim 6, wherein the first connector and the second connector are pad structures.
9. 9. A resistor structure according to any of claims 4 to 8 in which the insulating member is an insulating heat conductive gel.
10. 10. An electronic device comprising a resistive structure according to any one of claims 1 to 9.

Description

Resistor structure and electronic device Technical Field The present disclosure relates to electronic technology, and more particularly, to a resistor structure and an electronic device. Background The alloy resistance is an ideal choice for current detection because of its precise and stable resistance value. By being connected in series in the circuit, the alloy resistance can measure the current flowing through it and convert the current into a voltage drop. Such voltage drops may be monitored and used to protect the circuit from excessive current, and when the current exceeds a preset threshold, the power management system may detect such a change and take appropriate action, such as shutting down the power supply or reducing the power, to prevent circuit damage or fire hazards. An important index for distinguishing the quality of the alloy resistance is the Temperature Coefficient (TCR), and the temperature drift of the alloy resistance refers to the characteristic that the resistance value of the alloy resistance changes along with the temperature. Such changes may result from changes in physical properties of the material itself, such as thermal expansion and contraction effects, and interactions of electrons and phonons within the material. In electronic circuits, such temperature-induced resistance changes may have a significant impact on the performance of the circuit The temperature drift characteristic of the alloy resistor is critical to the stability and accuracy of the circuit. In some applications, such as high-precision measurements, sensor circuits, or analog circuits, small changes in resistance can cause large fluctuations in circuit performance. Therefore, understanding and controlling the temperature drift characteristics of the alloy resistance is critical to ensure stable circuit performance. In order to reduce the temperature drift of the alloy resistance, various measures can be taken. At present, alloy resistor design engineers mainly select alloy materials with low temperature coefficients to manufacture resistors, the change of the resistance values of the materials is relatively small when the temperature of the materials is changed, and the materials are characterized in that as the temperature is increased, electrons collide with each other and are accelerated, scattering effect is carried out in the electron movement process, and the difficulty degree of electron movement is increased, so that the resistance values of the alloy resistors are increased. The thermal compensation technology can also be adopted to effectively reduce the temperature drift. The temperature drift of the resistor is counteracted by introducing a trend in the circuit opposite to the temperature variation. For example, in the conventional design, two alloy resistors with positive and negative temperature drift are connected in series, and under the condition that a certain current passes through the alloy resistors, the temperature of the resistor rises, and the positive and negative temperature drift of the two resistors are mutually offset. The design cost is high, a large amount of measured data is needed, and in reality, two resistors with just opposite temperature drift coefficients and small absolute value difference are difficult to match. The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present utility model and is not intended to represent an admission that the foregoing is prior art. Disclosure of utility model The utility model mainly aims to provide a resistor structure and an electronic device, and aims to solve the problems in the prior art. In order to achieve the above object, the present utility model provides a resistor structure, which includes an alloy resistor and a thermistor, the alloy resistor and the thermistor being connected in parallel; wherein the resistance value of the alloy resistor is R0, the resistance value of the thermistor is R1, and R1 is more than or equal to 1000R 0; The positive and negative of the temperature drift coefficient of the alloy resistor are opposite to the positive and negative of the temperature drift coefficient of the thermistor. Preferably, in the resistor structure, when the alloy resistor is an alloy resistor with a positive temperature coefficient, the thermistor is a thermistor with a negative temperature coefficient. Preferably, in the resistor structure, when the alloy resistor is an alloy resistor with a negative temperature drift coefficient, the thermistor is a thermistor with a positive temperature drift coefficient. Preferably, in the resistor structure, the alloy resistor and the thermistor are closely attached, and an insulating member is arranged between the alloy resistor and the thermistor. Preferably, in the resistor structure, the thermistor extends along the transverse direction, a first connecting piece is connected to the upper side of the thermistor, and a sec