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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 7
6.
A feedback network to be used with an amplifier to provide oscillation is tested and found to give an output of 0.124 V with a 0.5 V input. What percentage negative feedback should be introduced to the amplifier so that linear oscillations result?
1.25%
2.50%
-1.25%
-2.5%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
The advantage of Weinbridge oscillator over the phase shift oscillator is that oscillator the frequency may be varied over a range of
1 : 2
1 : 3
1 : 5
1 : 10
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
In figure the input and output Miller capacitances are
0.25 μF each
500 pF each
0.25 μF and 500 pF respectively
500 pF and 0.25 μF respectively
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
An inverting amplifier has R1 = 10 kΩ, and Rf = 150 kΩ then the O/P voltage, if input voltage Vi = 1 volt.
-15 V
-10 V
15 V
-14 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
Figure uses 10 V zener diode. The minimum and maximum current through series resistance are
10 mA and 30 mA
20 mA and 40 mA
0 and 30 mA
0 and 40 mA
Answer: Option
Explanation:

Minimum current = = 10 mA.

Minimum current = = 30 mA.

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