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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 7
31.
At midband frequencies the coupling capacitor in RC coupled CE amplifier may be considered as
open circuit
short circuit
a reactance equal to load resistance
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
An engineer designs an amplifier to have a voltage gain of 60, but when constructed it only had a gain of 50. What percentage of feedback will cause oscillations?
0.1%
0.5%
1%
2%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
The bandwidth of an amplifier is BW, of n-stage of such as amplifier are cascaded, the bandwidth will become
n BW
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
If a class C power amplifier has an input signal with frequency of 200 kHz and the width of collector current pulses of 0.1 ms, then the duty cycle of the amplifier will be
1%
2%
10%
20%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
An ideal voltage amplifier should have
low input impedance and high output impedance
high input impedance and low output impedance
high input impedance and high output impedance
low input impedance and low output impedance
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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