Question

Please solve the problems from 2_5

Digital system

Problem 2 Design a combinational circuit with inputs a, b, c, d and outputs w, x, y, z. Assume that the inputs a, b, c d represent a 4-bit signed number (2s complement). The output is also a signed number in 2s complement which is 5 greater than the input if the input is less than 2, and is 2 less than the input if the input is greater than or equal to 2 Problem 3 Use a 4x16 decoder to implement the following Boolean function: F=ab +bed+abd Problem 4 Use an 8x1 mux to implement the following Boolean function: F=ab +bed+abd Problem 5 Use the Boolean functions developed in Problem 1 to create a circuit in verilog HDL with four inputs (a,b,c,d) and two outputs (F1, F2) with each output equal to the result of Problem 1. Show your HDL code as well as the simulation results

Answer 1

This question is based on design of combinational circuits.

Problea 2 n bit kber In s Complement epresentation of -2 n-1 Op 'p Given 5 greater f input is less thu 2 Output is thau input greater than ar equal t input is is 2 less thau input Output 2' Tui Table Decimal Decimal Bquivalent equivalent of imput Output nput C d a of Output Using +5 K-Map +6 Simplifiatiog +2 3 expressions +4 +2 Sor + 5 +3 +6 O O +4 C cau be fourr + 5 C O 8 -3 C - 1 4 13 -3 +2 O +3 -2 14 +4 O O W (8,9,10) O,,6,1, 8,9,10 15) X = ab cd 00 01 cd ab 00 01 1to xbC+ abc +bcd+abd 2. 6 C in W abc abd Scanned by CamScanner

y 84,40 CO, , 8,10, 12,14) 3 4) to ats TO T00 o0 01 1O y Ed4&be+aca adt bed+cd+ a bd Ciroit a DO Do DO Scanned by CamScanner