ADC中高精度转换序列发生器的设计

The Design of High Precision Conversion Sequence Generation in ADC

在信号处理过程中,自然界的模拟信号首先要经过A/D转换器(ADC)变换成数字信号,送到DSP中。文章设计了一种高精度的转换序列发生器,能分别单独处理8位数据,并行后能处理16位数据。这意味着ADC每收到一个启动转换请求,模块可以自动执行多次转换。对于每一次转换,可以通过模拟多路开关选择16个可用输入通道中的任何一个。转换结束后,所选通道的转换结果被保存在相应的结果寄存器中。也可以对同一个通道采样多次,允许用户使用"过采样",其较传统的单次采样转换结果提供了更高的精度。该设计为高精度DSP的设计提供了良好的技术基础。

The natural analog signal may turn to digital signal by AD convertor first, and then transport to the DSP, in the process of signal manages. This paper design a high precision conversion sequence generation. It can deal with 8 bits data respectively and 16 bits data in parallel. It means that： ADC received every conversion request; the module will conduct several conversions automatically. Each of conversion, we can choice every input channel through the 16 analog MUX. After the conversion, the results are saved in result- registers. We also can sample several times in a channel precision than traditional single conversion. This work DSP design. Let consumer use pass-sample, which supplied more supplies a good technologic base for high precision