基于STM32F103ZET6的实用信号源的设计和制作  

Design and manufacture of practical signal source based on stm32f103zet6

作　　者：顾浚哲 杨旻荟 田澄睿 Gu Junzhe;Yang Minhui;Tian Chengrui(School of Electronics and Information Engineering,Nanjing University of Information Science and Technology,Nanjing Jiangsu,210044)

机构地区：[1]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《电子测试》2022年第12期22-24,共3页Electronic Test

摘　　要：信号发生器是一种历史悠久的测量仪器,在生产实践和科技领域中有着广泛的应用,是各种测试和实验过程中不可缺少的工具。本文设计了一种信号可发生频率20Hz~3Mhz,输出电压峰峰值1~8V可调的实用信号源。本系统的硬件主要由DDS芯片AD9850、STM32F103ZET6主控芯片、AD8021减法电路、程控放大AD603和有效值检测模块AD637构成。首先通过AD9850产生两路相位相反的正弦波,随后接入AD8021减法电路相减去除直流分量,经分压电路分压后输入AD603进行放大,放大倍数由STM32F103ZET6主控芯片通过DA输出进行压控,放大后的信号经有效值检波模块转化为直流信号后接入主控芯片进行测量,形成闭环控制,并经由串口屏在本地显示输出正弦信号的频率和峰峰值。本系统的软件设计是基于主控芯片STM32F103ZET6的AD和DA,通过按键设置输出正弦信号的频率和峰峰值。The signal generator is a long-established measuring instrument with a wide range of applications in production practice and science and technology,and is an indispensable tool in various testing and experimental processes.In this paper,a practical signal source is designed in which the signal can be generated at a frequency of 20Hz to 3Mhz and the output voltage is adjustable from 1 to 8V peak to peak.The hardware of this system mainly consists of the DDS chip AD9850,the STM32F103ZET6 main control chip,the AD8021 decimation circuit,the programmable amplifier AD603 and the RMS detection module AD637.Firstly,the AD9850 generates two sine waves with opposite phase,which are then subtracted from the AD8021 subtraction circuit to remove the DC component and then fed into the AD603 for amplification by the voltage divider circuit.The amplified signal is converted into a DC signal by the RMS detector module and then connected to the master chip for measurement,forming a closed-loop control and a local display of the frequency and peak-to-peak value of the output sine signal via the serial screen.The software design of the system is based on the AD and DA of the main control chip STM32F103ZET6,and the frequency and peak-to-peak value of the output sine signal are set via the keypad.

关 键 词：信号发生器 STM32F103ZET6 DDS AD9850 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]