Method for drawing Bode plot, and oscilloscope

Abstract

The invention discloses a method for drawing a Bode plot, and an oscilloscope. The method comprises the following steps that: obtaining a signal source configuration parameter and a Bode plot displaycoordinate parameter set on the oscilloscope; according to the signal source configuration parameter, calculating signal source frequency; configuring the signal source configuration parameter and thesignal source frequency to a signal source to enable the signal source to generate a detection signal used for detecting a detected amplification circuit; according to the output signal of the detected amplification circuit, calculating the time base and the voltage range of the oscilloscope; according to the obtained amplitude and offset phase of the output signal of the detected amplification circuit as well as a Bode plot display coordinate parameter, calculating an amplitude-frequency point coordinate and a phase frequency point coordinate; and independently according to the amplitude-frequency point coordinate and the phase frequency point coordinate, drawing the Bode plot. Since the oscilloscope can automatically control the signal source and automatically draw the Bode plot according to a small quantity of parameters set by the user, the Bode plot drawing function of the Bode plot is realized, so that tedious work for manually drawing the Bode plot is effectively avoided, and efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of electronic measurement, in particular to a method for drawing Bode diagrams and an oscilloscope. Background technique [0002] For an electronic device or an electronic circuit, the electronic signal generated by it is generally a complex signal composed of signals of multiple frequency components, rather than a simple single frequency signal. The amplifying circuit is one of the most widely used electronic circuits, and it is also the basic unit circuit that constitutes other electronic circuits. In the amplifying circuit, due to the existence of reactance components, the amplitude magnification of different frequency signals is different, which will cause signal amplitude. At the same time, the phase shift of the amplifier circuit for different frequency signals is also different, which will also cause phase distortion. Therefore, it is necessary to analyze the amplitude distortion and phase shift dist...

AI Technical Summary

Problems solved by technology

This process requires the user to continuously manually control the signal source and oscilloscope, and obtain data points to draw the Bode plot, which is cumbersome and inefficient

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