系统电源监控电路中的数模混合设计

Power Monitor Circuit's D/A Mixed Design in Systems

系统电源监控电路不再是单一功能电路(数字或模拟电路),而是由数字电路和模拟电路混合构成的,所以在PCB设计时就需要考虑数字电路和模拟电路之间互相干扰问题,特别是地线上的噪音干扰。对数模混合电路PCB接地设计进行了详细分析和总结,最后还给出实际应用案例。

System＇ s power monitor circuit is not longer singly digital or analog, but D/A mixed. So in PCB layout we should take the cross interference of them, especially the noise interference on the ground traces. This article gives detail analysis and summary of PCB＇ s ground terminal methods on D/A mixed circuits, and in the end shows.