A、<img width="88" height="33" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/a060dba1-9e02-4c56-a8a6-bc69baf43f3f.jpg">
B、<img width="91" height="30" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/23b0980c-1951-431a-a59f-3fecd7880fd6.jpg">
C、<img width="87" height="34" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/2ad6e758-eea5-4af9-ab62-541e0a1db082.jpg">
D、<img width="92" height="32" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/3a5244d3-4c35-4cab-83bd-fa84ac4737cb.jpg">
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试题解析
反馈连接后的等效传递传递函数为:
而对于负反馈有: