摘要
以单片机和FPGA为控制和处理核心,基于直接数字频率合成原理,利用DDS集成器件AD9851实现100 Hz～19 MHz输出的正弦信号发生器。通过自动增益控制(AGC)和功率放大,在50Ω负载情况下,100 Hz～19 MHz范围内,系统输出正弦波电压峰-峰值(6±1)V。系统硬件设计采用EDA工具,软件采用模块化的编程思想。
Based on the principle of DDS,the system uses the AT89C51 and FPGA as control and processing unit ,and uses the DDS chip AD9851 to realize the sine ware generator which outputs from 100 Hz to 19 MHz. With a loading resistor of 50 Ω and through automatic gain control and power amplifier,the system can output a sine wave ranging from 100 Hz to 19 MHz with a voltage peak-to-peak value as high as 6 V and stable amplitude.The system hardware design is used with EDA tools, and system software design is used with model programming idea.
出处
《电子设计工程》
2009年第5期13-15,共3页
Electronic Design Engineering
