基于C8051F020的音频分析仪设计  

Design of Audio Analyzer Based on C8051F020

作　　者：吕梅梅[1] 马艳[1] 郝大文 

机构地区：[1]江苏自动化研究所,江苏连云港222007

出　　处：《工业控制计算机》2020年第7期162-163,共2页Industrial Control Computer

摘　　要：系统以高速SOC混合信号微控制器(C8051F020)为主要控制器,将音频信号进行采集处理之后,采用快速傅里叶变换(FFT)技术进行频谱分析,完成音频信号分析仪的设计。该系统主要由正弦信号发生模块、输入阻抗匹配、滤波模块、数据处理主控单元以及人机接口模块组成。信号采集及程控增益放大用C8051F020内置高速ADC0及其可编程窗口检测器,对采到的数据经数字滤波、FFT变换后进行各项参数的测试。The system uses a high-speed SOC mixed-signal microcontroller(C8051F020)as the main controller.After the audio signals are collected and processed,the fast Fourier transform(FFT)technology is used to complete the design of the audio signal analyzer.The system is mainly composed of sinusoidal signal generation module,input impedance matching,filtering module,data processing main control unit and human-machine interface module.Signal acquisition and program-controlled gain amplification are realized through C8051F020's built-in high-speed ADC0 and its programmable window detector,and the parameters of the data are tested after digital filtering and FFT transformation.

关 键 词：音频信号分析 FFT C8051F020 

分 类 号：TN912.3[电子电信—通信与信息系统]