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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 7
46.
Which op-amp circuit uses a capacitor in series with input and resistance in feedback path?
Differentiating amplifier
Integrating amplifier
Logarithmic amplifier
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
For class B operation the theoretical maximum efficiency is
100%
78.5%
50%
27.5%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
Typical values of current gains for CE, CB and CC amplifiers are
120, 120 and 1 respectively
120, 1 and 120 respectively
1, 120 and 120 respectively
1, 1 and 120 respectively
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
To draw ac equivalent circuit for a CE amplifier we should
Reduce all dc sources to zero
Short all capacitors
Reduce all dc sources to zero and short all capacitors
Reduce all dc sources to zero and open all capacitors
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
In the circuit of figure, the value of re is (neglecting vbe)
100 Ω
75 Ω
50 Ω
25 Ω
Answer: Option
Explanation:

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