基于VCA810的自动增益控制放大器的设计与实现  

Design and Realization of Automatic Gain Control Amplifier Based on VCA810

作　　者：王书立[1] 王勤宏[2] WANG Shuli;WANG Qinhong(School of Fine Art,Suzhou Vocational University,Suzhou 215104,China;School of Computer Engineering,Suzhou Vocational University,Suzhou 215104,China)

机构地区：[1]苏州市职业大学艺术学院,江苏苏州215104 [2]苏州市职业大学计算机工程学院,江苏苏州215104

出　　处：《苏州市职业大学学报》2020年第4期30-35,共6页Journal of Suzhou Vocational University

摘　　要：以STM32F103RET6和VCA810为核心部件,辅以分级处理模块、测频模块、键盘输入模块、LCD显示模块及话筒输入模块等组成一个自动增益控制放大器。当输入音频信号频率在100 Hz^10 kHz、幅度在10 mV^5 V时,该系统可通过STM32F103RET6调节VCA810的压控电压,实现放大器输出幅度的保持、步进式调节和任意设定等功能,并能够根据环境噪声的改变自动调节放大器的输出幅度。该设计适用于各种接收机、录音机和信号采集系统。Taking STM32F103RET6 and VCA810 as the core components,the paper presents an automatic gain control amplifier composed of hierarchical processing module,frequency measurement module,keyboard input module,LCD display module,microphone input module,and etc.When the frequency of input audio signal varies between 100 Hz and 10 kHz,with the amplitude within the scope of 10 mV^5 V,this system is capable of maintaining,step modulating,and setting the output amplitude of the amplifier through adjusting the voltage of VCA810,which is controlled by STM32F103RET6.Furthermore,the output amplitude of the amplifier can also be adjusted automatically according to ambient noises,which makes it suitable for the application in receiver,recorder and signal acquisition system.

关 键 词：自动增益控制 放大器 STM32F103RET6 VCA810 

分 类 号：TN702[电子电信—电路与系统]