STUPIDSID
Solve any one question from Q1 and Q2
1 (a)
State and explain three stability factors.
6 M
1 (b)
Consider single stage CE amplifier with RS=1 kΩ, R1=50 kΩ, R2=2 kΩ, RC=2 kΩ, RL=2 kΩ, hfe=50, hre=2.5×10-4, hoe=25 μ Amp/V, hie=1.1 kΩ. Calculate: Ai, Ri and R0.
6 M
2 (a)
Explain diode compensation technique against ICO.
6 M
2 (b)
Calculate AVS, Ais & R0 for the transistor amplifier shown in Fig. (1) having h-parameters hie=1.1 k hfe=50, hre=2.5×10-4, hoe=1/40k.
6 M
Solve any one question from Q3 and Q4
3 (a)
Draw and explain low frequency response of single stage RC coupled CE amplifier.
6 M
3 (b)
Determine the frequency of Oscillation when RC phase shift oscillator has R=10 k, C=0.01 μf and RC=2.2k. Also find the minimum current gain needed for this purpose.
6 M
4 (a)
The following measurement were taken while testing an amplifier using square wave input waveform:
i) for frequency of 5 kHz, tr=20 μsec.
ii) for frequency of 100 Hz, there is a sag/tilt of 1 volt in 2.5 volts.
Amplitude as observed on CRO. Determine the bandwidth of the amplifier under test.
i) for frequency of 5 kHz, tr=20 μsec.
ii) for frequency of 100 Hz, there is a sag/tilt of 1 volt in 2.5 volts.
Amplitude as observed on CRO. Determine the bandwidth of the amplifier under test.
6 M
4 (b)
Draw and explain Hartley oscillator.
6 M
Solve any one question from Q5 and Q6
5 (a)
Draw and explain vertically oriental structure of n-p-n power BJT.
6 M
5 (b)
Class A power amplifier has zero signal collector current of 100 mA. If the collector supply voltage is 5 V, determine:
i) Maximum AC power output
ii) Power rating of transistor
iii) Maximum collector circuit efficiency.
i) Maximum AC power output
ii) Power rating of transistor
iii) Maximum collector circuit efficiency.
7 M
6 (a)
Draw and explain class B-push pull power amplifier. State its merits and demerits.
7 M
6 (b)
A power amplifier supplies 3 watt to a load of 6 kΩ. The zero signal DC collector current is 55 mA and the collector current with signal is 60 mA. How much is the percentage second harmonic distortion?
6 M
Solve any one question from Q7 and Q8
7 (a)
Explain the following non-ideal current voltage characteristics of MOSFET:
i) Finite output resistance
ii) Body effect
iii) Subthreshold conduction.
i) Finite output resistance
ii) Body effect
iii) Subthreshold conduction.
6 M
7 (b)
Calculate the drain current and drain to source voltage of common source circuit shown in Fig. 2. Given: VTN=1 V, Kn=0.1 mA/V2.
7 M
8 (a)
Draw and explain constant current source biasing circuit for EMOSFET.
6 M
8 (b)
For the circuit shown in Fig 3. determine the small signal voltage gain. Assume parameters VGSQ=2.12 V, VDD=5 V, RD=2.5 kΩ, VTN=1 V, Kn=0.8 mA/V2, λ=0.02 V-1. Assume the transistor is biased in the saturation region.
7 M
More question papers from Electronic Devices & Circuits