STUPIDSID
1(a)
Explain the operation junction diode under forward and reverse bias condition.
6 M
1(b)
For zener regulator shown in the Fig.Q.(b), calculate the range of input voltage for which output will remain constant. !mage
4 M
1(c)
Skctch the transistor input and output characteristics of CE configuration and briefly explain the three region of operation.
6 M
2(a)
With circuit digram, explain the operations of center-tapped full wave rectifier. Draw input and output waveforms.
6 M
2(b)
Explain how zener diode can be used as voltage regulator.
5 M
2(c)
Derive the relationship between α and β.Find the values of β, α and IE for transistor has IB =100 μA and IC=2mA.
5 M
3(a)
With neat circuit digram, explain the operation of voltage divider bias circuit with necessary equations.
6 M
3(b)
Draw the circuit of op-amp integrator.Derive the expression for output voltage.
6 M
3(c)
Calculate the o/p voltage of a three input inverting summing amplifier , given R1=200KΩ,R2=250KΩ,R3=500KΩ,Rf=1MΩ,V1=-2V,V2=-1V and V3=+3V.
4 M
4(a)
For the circuit shown in Fig.Q.4(a) find the Q-point values and draw DC-load line , where VBE=0.7V and β=50.
6 M
4(b)
Draw the circuit of non-inverting op-amp. Derive the expression for the voltage gain.
5 M
4(c)
Define the following terms with respect to op-amp: i)slew, ii)CMRR, iii)PSRR.
5 M
5(a)
Convert:
i)(526.44)8=(?)2=(?)10.
ii)(48350)10=(?)16=(?)8.
i)(526.44)8=(?)2=(?)10.
ii)(48350)10=(?)16=(?)8.
4 M
5(b)
Subtract the following using 2's complement method; (i) 1010112from1110012 (ii) 1110012from1010112
4 M
5(c)
Simplify the following expression and realize using basic gates
\[Y=A(\overline{ABC}+A\overline{B}C)\]
\[Y=A(\overline{ABC}+A\overline{B}C)\]
4 M
5(d)
Realize half adder using NAND gates only.
4 M
6(a)
Convert:
i)(342.56)10=(?)2=(?)8.
ii)(BCDE)=(?)2=(?)8.
i)(342.56)10=(?)2=(?)8.
ii)(BCDE)=(?)2=(?)8.
4 M
6(b)
Perform the subtraction
i)(11010)2-(10000)2 using 1's complement.
ii)(1000100)2-(1010100)2using 2's complement.
ii)(1000100)2-(1010100)2using 2's complement.
4 M
6(c)
State and prove DeMorgan's theorems.
4 M
6(d)
Write the symbol, truth table and final expression for NAND and Ex-OR gate (For two I/PS).
4 M
7(a)
With diagram and truth table explain NAND gate latch.
5 M
7(b)
With diagram and truth table explain clocked R-S flip-flop
5 M
7(c)
Explain the architecture of 8051 microcontroller.
6 M
8(a)
What is flip-flop? Explain the operation of NOR gate latch using its truth table .
8 M
8(b)
With block diagram, explain microcontroller based stepper motor control system.
8 M
9(a)
With the help of block diagram, explain communication system.
6 M
9(b)
With circuit diagram explain the process of AM demodulation.
5 M
9(c)
Explain the principle of operation of piezoelectric transducer.
5 M
10(a)
Why modulation is necessary in communication system? List the different types of modulation schemes.
5 M
10(b)
A carrier 1MHz with 400 W of its power is amplitude modulated with a sinusoidal signal 0f 2500Hz. The depth of modulation is 75%.Calculate the sideband frequencies, the band width,the power in the side bands and the total power in the modulated wave.
5 M
10(c)
Explain the construction and the principle of operation of LVDT.
6 M
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