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发表于 2008-10-9 12:46:04
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    原帖由 allen_yyq 于 2008-10-8 17:44 发表 Current-Voltage feedback, you can conduct the output resistance using feedback theory, it's make sense to understand the feedback effect, such as increasing output resistance for current -voltage feed ...
 
 Thank you for your kindly reply.
 So the current feedback at output node make the rout of this circuit much bigger , in fact multiplyed by gm*Rs
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