数模混合信号前端的系统分割考虑ADI

简介：

问：这里所说的系统分割是指在PCB布局上的考虑么？
答： No, this is the system partition according to the TTM and cost and performance.

问：不同芯片的不同工作电压之间的兼容性能够很容易的解决吗？

答： This is decided by the parts. And you should try to select the parts with fewer voltages.

问：How many ways to partition the modules?

答： To achieve highest performance/price, one analog/digital mixed front (AFE) and one high density digital ASIC is perfered. Sometimes power management is also intergated into digital ASIC. But normally the Audio is not intergated in Video, because the line w

问：模拟前端的接口电平应如何考虑?有何具体要求?
答： This is decided by your system design. For wireless system, you can calculate this according to the NF reuirement.

问：请问这个前端是什么意思啊？是指缓冲和预处理么？谢谢
答： 指ADC和DAC，包括某些辅助功能，如时钟，控制增益用辅助DAC和检测状态用辅助ADC。

问：MxFE适合用于窄带系统吗？

答： What"s the bandwidth? We have mentioned in the presentation that when the ADCs and DACs can be used, you can use it.

问：在无线接收系统中，模拟的前端存在着相位不稳，稳定性差的缺点，而数字接收就可以很好的解决这一问题。但是数字接收就存在着要求采样率高的问题，这一矛盾怎么解决呢？
答： ADI will try to solve these questions. And ADI can provide more and more high speed ADCs and DACs, DDC, DUC and DSPs.

问：1、模拟地和数字地是在电路板上汇合还是在电源输出点汇合好？
2、模拟和数字分割后，跨越分割区的信号如何受到影响？
答： 1. I think you"re asking about system (multi-PCB), then joint point should be at power supply.
2. The signal routine will be influenced by analog/digital spliting, therefore you need to make sure, especially digital signal routine will not cross a

问：请问对于混合信号，线路板的设计是地线分开还是模拟和数字完全分开，最后再统一地线，那个抗干扰性最强
答： For mixed signal circuit, normally you should use single ground (analog). Please refer to previous answer to same question.

问：请问公司有用于监控4通道输入一输出的芯片吗
答： What"s the input and output of the signal? Is it power supply?