DC amplifiers are employed with_______ feedback type.(a) positive(b) negative(c) depends on the application(d) can be any positive or negative does’t matterI had been asked this question during an internship interview.The above asked question is from Preamplifiers topic in portion Recording System of Biomedical Instrumentation

DC amplifiers are employed with_______ feedback type.(a) positive(b) n

1.	DC amplifiers are employed with_______ feedback type.(a) positive(b) negative(c) depends on the application(d) can be any positive or negative does’t matterI had been asked this question during an internship interview.The above asked question is from Preamplifiers topic in portion Recording System of Biomedical Instrumentation
Answer» Right option is (b) negative Explanation: DC amplifiers are generally of the negative FEEDBACK type. They are used for medium GAIN APPLICATIONS down to about 1 MV signal levels for full scale. They are not practical for very low level applications because of dc drift and poor common-mode REJECTION capabilities.

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