摘要
配合DSP实时处理要求设计了视频信号数据采集电路。介绍了转换速率高达20MSPS的A/D转换器原理及典型应用电路。根据A/D转换和DSP流水工作要求,采用双端口RAM作为数据缓存的共享存储器,并设计了双端口RAM两侧存储无冲突访问控制电路。给出了详实的数据采集电路,对电路的工作原理进行了阐述。
video frequency data acquisition circuit is designed according to real-time processing requirement of DSP. The theorem of A/D convertor which speed is up to 20 MSPS and its typical applied circuit is introduced. Because the A/D convertor and DSP work in the mode of stream line, the dual-ported RAM as the shared memory is adopted to buffer data. At the same time, the access control circuit is designed to avoid storage collision of dual-ported RAM in two sides. The specific data acquisition circuit is given and the theorem of the circuit is represented.
出处
《东北电力学院学报》
2003年第6期13-15,60,共4页
Journal of Northeast China Institute of Electric Power Engineering
