[Guangxi Normal University Competition] Arbitrary waveform generator

Question D Arbitrary waveform generator

1. Task

Design and make an arbitrary waveform generator that can generate sine waves, square waves, and triangle waves.

The waveform generator can guarantee constant voltage output within a certain range.

2. Requirements

1. Basic requirements

(1) The waveform generator can generate three periodic signals: sine wave, square wave, and triangle wave;

(2) The frequency range of the output waveform is 100Hz ~ 100kHz; the frequency is adjustable, and the frequency step interval ≤

100Hz;

(3) Under 50Ω load condition, the maximum output voltage peak-to-peak value is ≥ 2V;

(4) Function to display the type, repetition frequency (period) and amplitude of the output waveform;

(5) There is no obvious distortion when observed with an oscilloscope.

2 . play part

(1) The frequency range of the sinusoidal signal is extended to 1Hz~10MHz, further improving the output of square waves and triangle waves.

output frequency.

(2) With output frequency and frequency step setting functions;

(3) Under 50Ω load condition, the maximum output voltage peak-to-peak value is ≥5V;

(4) It has the function of displaying waveform type, frequency and amplitude;

(5) At least one arbitrary waveform can be output.

3. Explain that the waveform generator can generate sine waves, square waves, and triangle waves. The waveform generator can ensure constant voltage output within a certain range. The part is controlled through the microcontroller keyboard, and can convert different waveforms and step in four specifications. Switch to digital display on LCD.

School-level first prize team members: Huang Yonghua, Yang Jingbo, Wu Guanfu Instructors: Liao Zhixian, Huang Guoxian