An asymmetric nonlinear temperature-compensated attenuator and a design method thereof

By constructing an equivalent resistance unit combining PTC and NTC thermistors in a passive network, an asymmetric nonlinear temperature-compensated attenuator was realized, solving the problem that existing technologies cannot adapt to asymmetric nonlinear temperature compensation. This meets the high reliability requirements of aerospace, nuclear industry, and medical equipment, and reduces system cost and complexity.

CN122371913APending Publication Date: 2026-07-10UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Application Number
CN202610821234.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-09
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing temperature compensation attenuators cannot achieve nonlinear and asymmetric temperature compensation. Especially in high-reliability applications such as aerospace, nuclear industry and medical equipment, digital circuit solutions are costly and do not meet the requirements of low power consumption and miniaturization. Existing passive temperature compensators cannot adapt to the asymmetric and nonlinear temperature compensation requirements.

Method used

An asymmetric nonlinear temperature-compensated attenuator is designed. By constructing an equivalent resistance unit with an extreme point, a precise mirror fit of the non-monotonic temperature characteristics is achieved in a passive network. A combination of PTC and NTC thermistors is used to construct the equivalent resistance units with the maximum and minimum resistance values ​​at room temperature. These units are then configured in a T-type or π-type two-port attenuation network to achieve a mirror relationship between the attenuation-temperature curve and the RF link to be compensated.

Benefits of technology

It achieves nonlinear and asymmetric temperature compensation, meeting the high reliability requirements of aerospace, nuclear industry and medical equipment, avoiding the use of digital circuits, reducing system cost and complexity, adapting to a variety of nonlinear curves, and suitable for nonlinear temperature compensation with complex shapes.

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Abstract

This invention discloses an asymmetric nonlinear temperature-compensated attenuator and its design method, belonging to the field of electronic circuit technology. Specifically, it is based on a T-type or π-type two-port attenuation network design. The series and parallel arms are selected from parallel or series equivalent resistance units, and the series and parallel arms of the same type of two-port attenuation network are different. The parallel equivalent resistance unit consists of a first PTC thermistor, a first NTC thermistor, and a first fixed resistor connected in parallel. The series equivalent resistance unit consists of a second PTC thermistor, a second NTC thermistor, and a second fixed resistor. The second NTC thermistor is connected in parallel with the second fixed resistor, and then connected in series with the second PTC thermistor. This invention achieves accurate mirror fitting of non-monotonic temperature characteristics in a passive network by constructing equivalent resistance units with extreme points, flexibly adapting to various asymmetric nonlinear curves.
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