Temperature Drift Compensation Method, Circuit and Digital Oscilloscope for Digital Oscilloscope

Abstract

The application discloses a temperature drift compensation circuit for a digital oscilloscope, including a temperature drift compensation controller, a digital-to-analog converter, a bias adjustment circuit and a temperature sensor. Wherein, the temperature sensor is used for monitoring the temperature of the oscilloscope, and sends the obtained temperature value to the temperature drift compensation controller. The temperature drift compensation controller is used for outputting a temperature drift offset bias code according to the temperature value. The digital-to-analog converter is used to convert the temperature drift offset coding into an analog signal, so as to obtain the temperature drift offset conditioning electrical signal. The bias adjustment circuit generates a temperature drift bias voltage signal in response to the temperature drift offset conditioning electrical signal, which is superimposed on the output signal of the attenuation network of the digital oscilloscope, so as to perform temperature drift compensation on the waveform displayed by the digital oscilloscope. Since the temperature drift compensation is performed based on the acquired real-time temperature value of the oscilloscope, the display waveform temperature drift phenomenon caused by temperature changes during the use of the oscilloscope is attenuated.

Description

technical field [0001] The invention relates to the technical field of digital oscilloscopes, in particular to a temperature drift compensation method and circuit for digital oscilloscopes and digital oscilloscopes. Background technique [0002] Digital oscilloscope is an indispensable tool for the design, manufacture and maintenance of electronic equipment. Today’s oscilloscopes are mostly digital oscilloscopes, which are becoming more and more popular because of their waveform triggering, storage, display, measurement, analysis and other functions. With the development of technology and market demand The rapid development of digital oscilloscope is considered as the eyes of engineers, and it will be used as a necessary tool to meet the measurement challenges of engineers. Especially in the development process of electronic circuits, oscilloscopes are frequently used for debugging and measurement. The measurement accuracy is getting higher and higher, and the performance re...

AI Technical Summary

Problems solved by technology

The parameters of the front-end analog devices of the oscilloscope are easily affected by temperature. The performance on the oscilloscope is that the small voltage range shows waveform drift. When the temperature around the analog device changes, the display drift of small voltage is more obvious, which in turn affects user testing.

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