如何实现阻抗匹配
若能把問題描述更具体一奌,會有很多人幫的上忙!
什么样的干扰信号?
太模糊了啊~~
每本书上都有匹配电路设计啊
ee3
dddddddddddddddddddddddddddddddddddddddd
什么样的干扰信号?不能在PA前滤掉吗
太笼统 要是这样还是看看微波方面的书 根据个人情况更有针对性一些
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是不是要加一个谐振网络就可以啊!
对于带外信号可以使用滤波器,对于带内信号就没有好的办法了
匹配也有很多种的,看你的要求了
如果干扰信号是由功放的输入端引入的,则在输入加滤波。
先看一看书吧,应该有很多都将到了
了解了解
学习,学习啊
可用ADS软件中的Smith Chart工具
这是两个问题,首先功放的匹配目的是进行最大功率的传送,当然是你感兴趣的功率,对于干扰信号,你尽可以再你的匹配电路中进行抑制。第一,需要达到你的所要信号的最大传输功率,即最大的增益,对于干扰信号,一个办法是在输入信号滤除,一个办法是在输出进行滤除。如果是放大器自身产生的,那么就是你的放大器设计有问题。显然可能出现自激的问题,这个问题就比较大了。
顶一下
好,谢谢!
可以
到其他论坛上看看
ddddd
問題描述得太簡單
沒有重點喔
如果不在工作频段范围内的,可用滤波器滤除
如果电路中在PA之后有一个干扰信号,你要确定干扰信号是不是外部带来的,不是的话就是这个PA有自激震荡存在.比须先消出自激震荡.
学习了,谢谢!
这个干扰信号应该在PA之前就有,只是不明显,你加PA后它也跟着放大,建议的办法就是在前面加一级低增益的LNA.这种情况下滤波的效果不是那么明显
不清楚,帮顶