Question

DC amplifiers are mostly used for very low level applications because they offer very less dc drift and high common mode rejection capabilities.

(a) True

(b) False

I got this question in my homework.

My question is based upon Preamplifiers topic in chapter Recording System of Biomedical Instrumentation

Answer 1

Right answer is (b) False

For explanation: DC amplifiers are not practical for very low level applications because of dc drift and poor common-mode rejection capabilities. They are usually employed as pen drive amplifiers in direct writing recorders. They are used for medium gain applications down to about 1 mV signal levels for full scale.