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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 21
21.
In a BJT amplifier circuit the size of coupling capacitor depends on
lowest frequency
highest frequency
average of lowest and highest frequencies
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
In a closed loop non-inverting amplifier, constructed using single break-frequency op-amp, bandwidth with feedback can be written as. (f0 - break frequency, β - gain of the feedback circuit, A - open loop voltage gain, Af - closed loop voltage gain)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
A silicon sample A is doped with 1018 Atoms/cm3 of Boron. Another sample B of identical dimensions is doped with 1018 atoms/cm3 of phosphorus. The ratio of electron to hole mobility is 3. The ratio of conductivity of the sample A to B is
3
1/3
2/3
3/2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
Which of the following circuit has the greatest bandwidth?
fr = 455 MHz; Q = 10
fr = 455 MHz; Q = 100
fr = 1 MHz; Q = 100
fr = 1 MHz; Q = 10
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
A FET is a __________ controlled device whereas a bipolar transistor is a __________ controlled device.
gate, drain
drain, gate
current, voltage
voltage, current
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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