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Which feedback system is employed in DC amplifiers?(a) Can be any positive or negative doesn’t matter(b) Negative(c) Depends on the application(d) PositiveI got this question in quiz.This question is from Telemedicine System in division Telemedicine Technology of Biomedical Instrumentation

Answer»

Right CHOICE is (B) Negative

Explanation: DC amplifiers are generally of the negative FEEDBACK type. They are not practical for very low level applications because of dc drift and poor common-mode REJECTION capabilities. They are used for medium gain applications down to about 1 mV signal levels for full scale.



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