基于VCA810可控增益程控放大器的设计  

Design of VCA810 Controllable Gain Control Amplifier

作　　者：黄志文 王春梅 卢美吉 钟绪杰 韦善于 Huang Zhiwen;Wang Chunmei;Lu Meiji;Zhong Xujie;Wei Shanyu(Electronic and Communication Engineering Institute,Yulin Normal University,Guangxi,Yulin,537000,China)

机构地区：[1]玉林师范学院电子与通信工程学院,广西玉林537000

出　　处：《仪器仪表用户》2018年第12期41-44,共4页Instrumentation

基　　金：广西高等教育本科教学改革工程项目(2016JGA310);国家大学生创新创业项目(201710606003)

摘　　要：放大器的软件是利用FPGA作为控制核心,硬件部分可控增益程控放大器采用VCA810芯片为放大核心。FPGA利用12位的TLC2543芯片输出得到的连续模拟电压用来直接控制VCA810芯片的6引脚增益控制端来实现对增益的直接控制,最后根据VCA810程控放大器的放大倍数与FPGA产生的控制电压的关系得到最终信号的放大倍数。根据实验结果可证明该放大器频带宽、低噪声、性能稳定并且可控范围大。The amplifier uses FPGA as the control core,the controllable gain program-controlled amplifier uses the VCA810 chip as the amplification core,and the software uses the continuous analog voltage obtained by the 12-bit TLC2543 chip output to directly control the 6-pin gain control end of the VCA810 chip to achieve the gain.Direct control,According to the relationship between the VCA810 program-controlled magnification and the control voltage generated by the FPGA,the final signal magnification is obtained.The experimental results show that the amplifier has high frequency bandwidth,low noise,stable performance and high controllable range.

关 键 词：程控 放大 VCA810 可控增益 

分 类 号：TN722[电子电信—电路与系统]