基于DSP的多通道数据采集电路

提出了一种基于DSP的多通道数据采集电路的设计方案.该方案采用硬件高速锁相环电路控制多通道A/D转换器,使1个周期的采样点总数不变,但这个数值可调.然后,脉冲通过调理,且通过一种特殊的电路进行推迟再进入CPU.这样,CPU就可以处理这些信号,同时也避开了由元器件产生的毛刺.这样保证了电路的同步整周期采样,实现了多路数据的采集.同时,在仿真软件里对部分关键电路进行了仿真,然后,又在实际的完整电路板上再次验证了整个设计,其效果很好.

Circuit Design of Multi-channel Data Sampling Based on DSP

A method of circuit design of multi-channel data sampling based on DSP was proposed. A high speed PLL circuit was adopted to control the multi-channel AD convert, so the number of sampling point in a period was invariable. But it was adjustable. After that the. pulse would be adjusted, and postponed by a special circuit. Then it went into CPU, and the CPU dealt with it, and avoided the burrs which were created by the components. Implemented the synchronous sampling in a whole period, and the multi-channel data sampling. Meanwhile, some key component was simulated in simulation software. The whole real circuit is validated, and the performance of the circuit is perfect.