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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 15
21.
In a good voltage amplifier, its input impedance
must be high compared to the resistance of the source
must be low compared to the resistance of the source
must be equal to the resistance of the source
must be half the resistance of the source
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
A non-inverting voltage feedback amplifier is a
voltage amplifier
current amplifier
current to voltage converter
voltage to current converter
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
A Colpitt's oscillator uses
a tapped inductor
an inductor and two capacitors
both (a) and (b)
either (a) or (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
In every practical oscillator, the loop gain is slightly larger than unity and the amplitude of the oscillations is limited by the
magnitude of the loop gain
onset if non-linearity
magnitude of gain of the amplifier
feedback transmission factor
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
IF amplifiers for radio receivers are often tuned to
456 Hz
456 kHz
3456 MHz
456 GHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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