Electronics and Communication Engineering - Analog Electronics

31.
CMRR of an op-amp is about 0.1.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.

32.
A transistor amplifier has poles at
s1 = - 0.000245 x 109 rad/sec.
s2 = - 0.0748 x 109 rad/sec.
s3 = - 0.670 x 109 rad/sec.
s4 = - 4.38 x 109 rad/sec.
The upper 3 dB frequency of the amplifier will be
s1
s1 + s2 + s3 + s4
s1 + s4
s4
Answer: Option
Explanation:
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33.
In the circuit of figure for sinusoidal input the waveform of the output will be as shown in
figure A
figure B
figure C
figure D
Answer: Option
Explanation:
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34.
An engineer designs an amplifier to have a voltage gain of 60, but when constructed it only had a gain of 50. What value of feedback will double the gain?
+0.5%
+0.66%
+1%
+3.3%
Answer: Option
Explanation:
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35.
The maximum theoretical efficiency for class A amplifier is
12.5%
25%
50%
75%
Answer: Option
Explanation:
No answer description is available. Let's discuss.