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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 15
36.
In a practical oscillator, the magnitude of loop gain Aβ is kept slightly larger than unity and the amplitude of oscillations is limited by
the ratio of A to β
the on set of non-linearity of amplifying device
the linearity of amplifying device
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.

Assertion (A): Direct coupled amplifiers are rarely used

Reason (R): Direct coupled amplifiers suffer from the disadvantage of drift

Both A and R are correct and R is correct explanation for A
Both A and R are correct but R is not correct explanation for A
A is correct R is wrong
A is wrong R is correct
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
A multistage amplifier has a low pass response with three real poles at s = - w1 - w2 and w3. The approximate overall bandwidth B of the amplifier will be given by
B = w1 + w2 + w3
B = (w1 + w2 + w3)1/3
B = w12 + w22 + w32
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
In a feedback series regular circuit, the output voltage is regulated by controlling the
magnitude of the I/P voltage
gain of the feed back BJT
reference Voltage
voltage drop across the series pass transistor
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
The transformer cores operating at microwave frequency ranges are generally made up of
silicon steel
ferrites
albino
super alloy
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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