II-I 2nd MID DLD& EDC Important Questions

II-I CSE-A II MID DLD IMP Questions

1.  a) Implement the following Boolean function using 4× 1 multiplexer.

          F(A,B,C,D) = ∑m(2,5,8,9,10,14,15)

     b) Construct 4 to 16 line decoder with five 2-to-4 line decoders with enable
         input. Draw and explain the relevant logic diagram.                                         

2.      a) Using PLA logic, implement a BCD to excess-3 code converter. Draw and 

    explain its truth table and logic diagram.

     b) Construct 128×8 ROM using 32×8 ROM chips. Draw and explain the relevant 

         logic diagram.                                                                                                     

3.  a) Realize D-FF and T-FF using JK-FF. Draw the logic diagrams with their truth tables.

     b) Deduce the design procedure for sequential logic circuits

                       

4.  a) Design, draw and explain the 4-bit universal shift register.

     b) Design, draw and explain a 4-bit ring counter using D- flip flops with

          relevant timing diagrams.                                                

5.  a) Implement the following Boolean function using8× 1 multiplexer.

          F(A,B,C,D) = _m(2,5,8,9,10,14,15)

     b) Construct 4 to 16 line decoder with five 2-to-4 line decoders with enable
          input. Draw and explain the relevant logic diagram.

6.  a) A ROM chip of 4,096 × 8 bits has two chip select inputs and operates from a

         5-volt power supply. How many pins are needed for the integrated circuit  

         package? Draw and explain the block diagram of this ROM.

     b) For 3-input, 4-output truth table of a combination logic circuit, derive the PAL 

         programming table and draw the relevant logic diagram.

XYZ	ABCD
000 001 010 011 100 101 110 111	0100 1111 1011 0101 1010 0001 1110 0111

7. A sequential circuit with two D flip flops A and B, two inputs x and y and one 

    output z is specified by the following next state and output equations.

    i) A(t+1)= x’y xA       ii) B(t+1)= x’B xA        iii) Z=B

    a) Draw the logic diagram. b) List the state table for the sequential circuit.

    c) Draw the state diagram.

8.  a) Design, draw and explain a modulo -12 up synchronous counter using T- 

         flip flops.

     b) Draw and explain the logic diagram for a 4-bit binary ripple down counter

         using positive edge triggered flip-flops.

II-I II MID EDC IMP Questions

1. a) With neat sketch explain the different current components of transistor. 

b) Prove that the transistor acts an amplifier with suitable circuit diagram. 

2. a) Discuss the relationship between FET parameters.                            

    b) Discuss the VI characteristics of depletion mode MOSFET.

                 

3. a) What is thermal Runaway? How do you avoid it in amplifier circuits using BJT? Derive suitable   expression to avoid it.                                      

           b) Derive an expression for stability factor ‘S’ in self bias circuit.                       

4. Derive the expressions for voltage gain, current gain, Input impedance, output  impedance, voltage gain with respect to source and current gain with respect to source for generalized transistor amplifier at low frequencies.              

      5.   a) Discuss about the transfer characteristics of JFET, and give the
                importance of  Shockley’s equation.

            b) Explain the characteristics of Uni-junction Transistor with neat
                sketches.Give the circuit diagram using it for generating sweep voltage
                waveform.    

6. a) With the help of the CE configuration circuit, explain input, output characteristics and various    regions of the configuration in detail.

      b) Discuss about the construction and operation of a photo transistor.   

      7.  a) Discuss how h – parameters can be obtained from 
               transistor characteristics.

           b) Find expressions for voltage gain, current gain, Input impedance and
                output impedances of CC amplifier using simplified hybrid model.    

      8.   Explain about different types of compensation techniques in biasing circuits.