STUPIDSID
Solve any five of the following:-
1 (a)
Once SCR is triggered, the gate loses its control. Why?
4 M
1 (b)
Explain why cyclo converters are suitable only for low frequency only?
4 M
1 (c)
Why open loop configuration of OPAMP is not used for linear applications?
4 M
1 (d)
Design a circuit using basic gates to implement the following Boolean equation.
Y = AB + A'B
Y = AB + A'B
4 M
1 (e)
Write a program for loading a number 29H in register C and then displaying the same number in output port 01.
4 M
1 (f)
Why RC triggering is preferred over resistance triggering process?
4 M
2 (a)
Explain single phase full wave half controlled bridge rectifier (asymmetric configuration) with the help of circuit diagram and waveforms. Also explain why a separate FWD is not required in this case.
10 M
2 (b)
Explain the regenerative action of SCR with the help of two transistor analogy.
10 M
3 (a)
Explain the working of Modified Series Inverter with the circuit (which has two capacitors and two inductors) and waveforms. Also explain its advantage over simple series inverter.
10 M
3 (b)
What is the difference between Natural and Forced commutation? Explain any two forced commutation techniques of SCR with waveforms.
10 M
4 (a)
Explain any two circuits using SCR for the speed control of single phase induction motor.
10 M
4 (b)
Explain the block diagram of armature control method of speed control of DC shunt motor.
10 M
5 (a)
Discuss the overload and over voltage protection of DC motor using SCR.
10 M
5 (b)
Explain comparator circuit using OPAMP.
5 M
5 (c)
Draw a neat circuit diagram of differentiator using OPAMP and derive the input output voltage relation.
5 M
6 (a)
Realize Ex-or gate by
(i) Basic gates.
(ii) NAND gate.
(i) Basic gates.
(ii) NAND gate.
10 M
6 (b)
Which gates are called as universal gates? Why?
5 M
6 (c)
Explain Demorgan's theorem.
5 M
7 (a)
Explain the architecture of 8085 Microprocessor with block diagram.
10 M
7 (b)
Explain 555 timer as monostable multivibrator.
10 M
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