obsidian-notes/电源/射频前端稳压思路.md
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---
title: 射频前端稳压思路
updated: 2022-05-09 00:44:36Z
created: 2022-05-07 06:22:44Z
---
射频前端中器件大部分都是5V供电少部分3.3V,为保证性能,一般都会对进电进行滤波,去除其中的干扰,
滤除的方法有【稳压】,【磁珠+电容】【专用IC】等各有优势
【**稳压**】用于进电一般的LDO具有很高的PSRR可以对进电的杂散信号进行很好的抑制减小进电的波动影响具有PG端、使能端等功能引脚便于功能扩展
【**磁珠+电容**】用于分支供电,结构简单
【**专用IC**】用的较少
推荐【稳压】,【磁珠+电容】配合使用
计划射频前端供电方案由原来的【12V供电->DCDC至6V->分路稳压至3.3V/5V】改为【5V供电->DCDC至6V->分路稳压至3.3V/5V】