Digital / VHDL Questions


  1) State De Morgan's theorem and prove it by implementing the circuit .

  2) Design and setup a circuit to add three numbers x,y,z .

  3) Implement a 3 input subtractor using nand gates only .

  4) Setup 4-bit Up-Counter using D-FF.

  5) Obtain the function AB + BC + CA using Nand gates only .

  6) Derive a D-FF using a JK-FF .

  7) Make a circuit to detect the sequence 1011000101 .

  8) Full adder and Full subtractor using mode control .

  9) Make a stopwatch circuit .

10) Set up a circuit to obtain the sequence 1,2,4,8,1,2,4,8... ... ...

11) Implement a circuit to perform shifting of given sequence towards left and towards right .

12) Generate both the sequences of Ring and Johnson with a single circuit .

13) Make a 3 bit Up / Down counter .

14) Implement circuit to select a single output from the given 4 inputs .

15) Setup a self starting mod-5 Up-counter .

16) Setup a self starting mod-5 Down-counter .

17) Obtain a circuit to convert the given 4-bit number to its corresponding Grey code .

18) Obtain a circuit to convert the given 3-bit number to its corresponding Excess three code .

19) Obtain a circuit to convert the given 4-bit number to its corresponding 2's complement .

20) Implement a fulladder / fullsubtractor with a single circuit .

21) Implement a full subtractor using 2 x 1 mux .

22) Design a circuit to obtain the sequence 1,2,4,8,1,3,7,15,14,12,8 ... ...

23) Derrive a JK-FF using D-FF .

24) Derrive a JK-FF using T-FF .

25) Derrive a T-FF using D-FF .

26) Derrive a T-FF using JK-FF .

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