混合信号系统中一种典型复合接地策略  

A Processing Method of Typical and Complex Ground Connection in Mixed Signal System

作　　者：童向杰[1] 谢凤玲[1] 孙承文[1] 

机构地区：[1]中兴通讯股份有限公司,南京210012

出　　处：《电子器件》2015年第1期115-121,共7页Chinese Journal of Electron Devices

摘　　要：结合项目过程遇到的一个时分多址噪音问题,系统阐释了时分多址噪音发生的机理和常用解决途径,但是这些常用的措施并不能解决该项目的时分多址噪音问题。通过该项目调试实践,发现除了相关音频单元部分采用星形接地外,其他部分模拟地和数字地不进行分割的综合策略,很好的解决了时分多址噪音问题。最后,进一步对混合数字信号系统接地策略的选择进行了总结,以期在混合信号系统设计中能够获得最佳性能。According to the matter of TDMA noise in the project process,it is systematically explained the fundamentals and usual solutions of TDMA noise. Unfortunately,these common measures can＇t play a part in our mobile terminal design. With the conscientious researches on our task,a perfect method was found to solve this problem which was that the star ground connection in partial audio circuits and the ground plane design were organically employed. At last,the main measure of ground connection was summarized in mixed signal system in order to obtain the best system performance.

关 键 词：混合信号系统 星形接地 时分多址噪音 突发脉冲序列周期 

分 类 号：TN912[电子电信—通信与信息系统]