Given an arithmetic function Y = 4A - B. Design a module that can perform the computation for the arithmetic function using the minimum unit of 4-bit adder only. Do not ignore the borrow output. You just need to show the block diagram. Do not show the gate level logic circuit. Clearly show the interconnections and input output labels.

Electric Motor Control
10th Edition
ISBN:9781133702818
Author:Herman
Publisher:Herman
Chapter22: Sequence Control
Section: Chapter Questions
Problem 6SQ: Draw a symbol for a solid-state logic element AND.
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(a)
Given an arithmetic function Y = 4A – B. Design a module that can perform the computation
for the arithmetic function using the minimum unit of 4-bit adder only. Do not ignore the
borrow output. You just need to show the block diagram. Do not show the gate level logic
circuit. Clearly show the interconnections and input output labels.
(b)
Prove the circuit in Figure Q.5 can perform the operation of adder/subtractor by completing
Table Q.5.
a,
a, b,
Sub
FA
FA
FA
FA
Co
Figure Q.5
Table Q.5
Sub
A[3:0]
B[3:0]
C4
S[3:0]
Operation
0111
1000
1
0111
1000
Transcribed Image Text:(a) Given an arithmetic function Y = 4A – B. Design a module that can perform the computation for the arithmetic function using the minimum unit of 4-bit adder only. Do not ignore the borrow output. You just need to show the block diagram. Do not show the gate level logic circuit. Clearly show the interconnections and input output labels. (b) Prove the circuit in Figure Q.5 can perform the operation of adder/subtractor by completing Table Q.5. a, a, b, Sub FA FA FA FA Co Figure Q.5 Table Q.5 Sub A[3:0] B[3:0] C4 S[3:0] Operation 0111 1000 1 0111 1000
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