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Positive feedback of Traff's current comparator

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Nagammai

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Hi All,

It is claimed as shown in the attached picture that Traff's current comparator has positive feedback (i.e) a positive Feedback from the CMOS Inverter (M3 and M4) is used to amplify small variations at the input node of the source follower. I am not able to see a positive feedback as such, instead am getting a negative feedback with my circuit analysis.


Could anyone please help me with an explaination of how is it called as a "positive feedback" here?

Thanks a lot in advance :)


https://obrazki.elektroda.pl/8894134800_1493282423.png
 

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