[Zhejiang University of Science and Technology Electrical Competition] Low-frequency bi-phase sine signal generator (Question F)

This project won the second prize in the 5th Electronic Design Competition of Zhejiang Sci-Tech University

Team number: ZSTU029

Team members: Liu Jingwang, Liu Qianqian, Liu Ren

Instructor: Lu Jun

"School Level Electronic Design Competition" Design Summary Report

Title: Low-frequency bi-phase sinusoidal signal generator

Output two independent sine waves, square waves, triangle waves, sawtooth waves, and modulated waves within a specific frequency range (the amplitude, frequency, and phase difference of the generated signals can be set programmably); and display the current two signals on the LCD display The output frequency, amplitude and phase difference are displayed as waveforms on the oscilloscope. (1) The two signals are independent and can be programmed to output sine waves, square waves, triangle waves and sawtooth waves;

(2) The maximum amplitude of the two signal outputs is not less than 3V, the amplitude of each channel is individually programmable and adjustable, and the setting resolution is 100mv;

(3) The frequency range of the two signals is adjustable from 1000Hz to 2000Hz, the step value is 10Hz, the frequency accuracy is not less than 1%, and the frequency and step value of each signal are individually programmable and adjustable;

(4) Generate two sinusoidal signals with the same frequency, and program-controlled to set the phase difference, which can vary from 0 to 360 degrees in steps of 10 degrees;

(5) The duty cycle of the generated square wave and sawtooth wave is adjustable in the range of 1%-99%, and the setting resolution is not less than 1%; 

 play part

(1) The maximum amplitude of the two signal outputs is not less than 6V, the amplitude of each channel is individually programmable and adjustable, and the setting resolution is not less than 10mv;

(2) The frequency step value of the two sinusoidal signals is not greater than 1Hz, and the frequency accuracy is not less than 0.1%;

(3) The phase difference setting resolution of two sinusoidal signals with the same frequency should not be greater than 3 degrees;

(4) Generate analog amplitude modulation (AM) signal: the modulation degree ma can be program-controlled and adjusted between 10% and 100% in the range of 100KHz ~1MHz, with a step of 10%, and the sinusoidal modulation signal frequency is 100Hz;

(5) Generate analog frequency modulation (FM) signal: generate a maximum frequency deviation of 1KHz in the frequency range of 10KHz~1MHz. And the maximum frequency deviation can be divided into two-level program-controlled adjustment of 500Hz/1KHz, and the sinusoidal modulation signal is 100Hz;

(6) Pattern output: can display patterns on the oscilloscope, for example: display W, V, L, N and other simple letter symbols.