digital electronics important questions

digital electronics important questions:-

1.  Design a posedge detector circuit.?

2. Consider in a 4:1 mux, if the select lines are A and B and inputs are c, C, c', c' whlch gate is inferred?3. How to represent a (8) into a sign-magnitude form? 

4. Find the grey-code for 20H?

5. What is the De-morgans 1st law equivalent to? required? 

6.When will AND gate work as OR gate? Explain about the input combinations?

 7.. How many 2:1 mux is recuired fo I for 8:1 mux?

8. (396)10 = ()13 ?

9. Write the 2's complement form of 1000?.

10. Which gates are used to represent a half adder?

 11. Write the hexadecimal m (4096*12) ?

12. What is a FIF0? ma representation of X. where X* 10+ (16°7) + (256°9)? 

 13. What is the difference between grey code, one hot encoding and binary code?

 14. What is the difference between Decoder and Demultiplexer? 

15, What is a ripple counter?

16. What is the difference between Moore and Mealy type FSM?

 17. Explain the conversion process from Grey to binary form? 

18. Explain the different types of counters?

 19. What is the difference between RAM and FIFO? 

20, Draw an FSM to detect a sequence 10110 in overlapping Mealy or Moore style?.

 21. Draw circuit diagram for BCD to excess-3 converter.?

 22. What is the difference between D-FF and D latch?

 23. Draw the circuit of binary to BCD converter. ?

24. Explain the circuit of negedge detector circuit.?

 25. Explain D-latch 26. Explain the D-latch Truth table and excitation? 

27. Explain the state transition diagram of D-latch? 

28. Draw the D-FF using 2x1 mux?

 29. Draw the D-ff using D-latch?

 30. (FF3)Hex (8) Hex =? 

31.Show the state diagram of 010 sequence detector using overlapping and  overlapping Moore FSM. 32. What is Johnson counter & ring counter? Explain with the circuit. 

33. Draw the full adder using NAND gate.?

 34. Draw the AND gate using  full adder?

35. What is duty cvcle?AND gate?

 36. What is setup and hold time? 

37. Convert an SR flip-flop to a D flip-flop. ?

38. How many flip-flops are required to designa mod50 counter?

? 39, How many 2x1 mux are required to design 16x1 mux?

40. Create a 3:8 decoder using 2:4 decoders.?

 41. Realize two different types of inverters using NAND gates?