Digital-analog combined gain temperature compensating circuit for travelling-wave tube amplifier

Abstract

The invention provides a digital-analog combined gain temperature compensating circuit for a travelling-wave tube amplifier. The circuit comprises a temperature-measuring circuit, an analog temperature compensating circuit, and a digital temperature compensating circuit, digital-analog combined gain temperature compensation for the travelling-wave tube amplifier can be realized, wherein the analog temperature compensating circuit can realize coarse temperature compensation via the adjustment of an adjustable resistor, the digital temperature compensating circuit obtains a digital temperature compensating voltage corresponding to an output voltage of the temperature-measuring circuit via a set look up table (LUT) so that fine tuning of temperature compensation is realized, the defects that by individually employing analog temperature compensation or digital compensation, the debugging quantity is large, self excitation easily occurs within a temperature range, the margin of temperature compensation is not sufficient, and the compensation match is poor are overcome, the realization mode of the circuit is simple, the requirements of miniaturization and low power consumption of space-borne products can be met, the compensation precision is high, and the margin is wide.

Description

technical field [0001] The invention relates to the technical field of temperature compensation circuit design, in particular to a digital-analog combined traveling amplifier gain temperature compensation circuit, which can be applied to space-borne linearized traveling wave tube amplifier products. Background technique [0002] Linearized traveling-wave tube amplifiers are widely used in communication satellites and navigation satellites. The functions and performance of domestic linearized traveling-release products are compared with imported products, and they are used to replace imported products in various satellite projects. The consumption has increased sharply. Usually, a satellite needs Dozens of domestically produced products are used. The application of line amplifier products needs to ensure the consistency of performance under different temperature conditions, so the gain temperature compensation method of line amplifier products is particularly important. [0...

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a digital-analog combined line amplifier gain temperature compensation circuit, the circuit includes an analog temperature compensation circuit and a digital temperature compensation circuit, which can realize the temperature compensation of the combination of digital and analog, and can overcome Using analog temperature compensation or digital temperature compensation alone has disadvantages such as large amount of debugging, insufficient temperature compensation margin, poor compensation matching, and easy self-excitation. The circuit implementation method is simple and can meet the requirements of miniaturization and low power consumption of spaceborne products. High compensation accuracy and large margin

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