# Electronics and Communication Engineering - Matching Questions - Discussion

### Discussion :: Matching Questions - Section 1 (Q.No.1)

1.

Match the following:

List I List II
A.RC coupled amplifier1.Very low drift
B.Tuned amplifier2.Flat frequency response from zero frequency onwards
C.Chopper stabilized amplifier3.Flat frequency response with upper and lower cut off frequency
D.DC amplifier4.Peak in gain frequency response

 [A]. A-4, B-3, C-1, D-2 [B]. A-3, B-4, C-2, D-1 [C]. A-3, B-4, C-1, D-2 [D]. A-4, B-3, C-2, D-1

Explanation:

No answer description available for this question.

 Sudalai said: (Sep 24, 2015) In matching questions no 1, I want details of list1 (answer description). So kindly send to me.

 Swaathi said: (Oct 5, 2015) A DC Amplifier will always have a flat frequency response from zero. (remember for AC it is sinusoidal) so the answers must be either A (or) C. If we deal for RC Coupled amplifier, the frequency will be flat only in upper and lower cases.

 Shivanshu Trivedi said: (May 10, 2017) An RC coupled response is first increasing...then max. For certain period of frequency then decreasing. Hence, it is max. In a centre band of frequencies and low at high and low frequencies due to capacitive effect of transistor and coupling capacitor respectively.( so, 2 cutoff frequencies). A DC coupled is has a constant gain from zero and then decreases(so 1 cutoff frequency). And tuned one shows peak gain at only it's tuned/resonance frequency.