Combination Circuits

Q8: Implement function using MUX & ADDER

Q- Design and implement the following logical functions with a combinational circuit (with A and B being 4-bit numbers): S1           S0           Output 0              0              A OR B 0              1              A AND B 1              0              A’ 1              1              A XOR B Ans:  The following circuit would give the required outputs:

Combination Circuits

Q7: Implement function using MUX & ADDER

Q- Design and implement the following with a combinational circuit (with A and B being 4-bit numbers): S2           S1           S0                           Output 0              0              0                              2A 0              0              1                              A plus B 0              1              0                              A plus B’ 0              1              1                              A minus 1 1              0              0                              2A + 1 1              0              1                              A plus B […]

Combination Circuits

Q6: Implement function using MUX & ADDER

Q- Design and implement the following with a combinational circuit (with A and B being 4-bit numbers): S1           S0                           Output 0              0                              A plus B 0              1                              left shift A 1              0                              A plus B plus 1 1              1                              2A + 1 Ans: We need one 4-bit parallel ADDER and MUX to implement the above. As […]

Combination Circuits

Q1: Timing Diagram

Q- We are implementing a 3-input AND gate using the following circuit: We can replace BLOCK with number of (a) Buffers   or   (b) Inverters. The delay of buffer is Tp=2ns. Now we need to choose components such that we have proper output at F= X.Y.Z and the waveforms are as: Ans:  Now if we orally […]