Design a 4-bit combinational circuit decrementer using four…
Question Answered step-by-step Design a 4-bit combinational circuit decrementer using four… Design a 4-bit combinational circuit decrementer using four full-adder circuits. 4-14. Assume that the 4-bit arithmetic circuit of Fig. 4-9 is enclosed in one IC package. Show the connections among two such lCs to form an 8-bit arithmetic circuit. 4-15. Design an arithmetic circuit with one selection variable S and two n-bit data inputs A and B. The circuit generates the following four arithmetic operations in conjunction with the input carry CLn. Draw the logic diagram for the first two stages. s 0 D A + B (add) D A + 1 (increment) D A – 1 (decrement) D A + lf + 1 (subtract) 4-16. Derive a combinational circuit that selects and generates any of the 16 logic functions listed in Table 4-5. 4-17. Design a digital circuit that performs the four logic operations of exclusiveOR, exclusive-NOR, NOR, and NAND. Use two selection variables. Show the logic diagram of one typical stage. 4-18. Register A holds the 8-bit binary 11011001. Determine the B operand and the logic microoperation to be performed in order to change the value in A to: ·- 01101101 b. 1111 1101 4-19. The 8-bit registers AR, BR, CR, and DR initially have the following values: AR 11110010 BR 11111111 CR 101 11001 DR 11101010 Determine the 8-bit values in each register after the execution of the following sequence of microoperations. AR <- AR + BR CR <- CR 1 DR, BR <- BR + 1 AR <-AR - CR Add BR to AR AND DR to CR, increment BR Subtract CR from AR 4-20. An 8-bit register contains the binary value 10011100. What is the register value after an arithmetic shift right? Starting from the initial number 10011 100, determine the register value after an arithmetic shift left, and state whether there is an overflow. 4-21. Starting from an initial value of R 11011101, determine the sequence of binary values in R after a logical shift-left, followed by a circular shift-right, followed by a logical shift-right and a circular shift-left. 122 CHAJ>Te F
