Question 1) Figure Q1 shows a Carry Look Ahead Adder which can be designed from four (4) full adder. Addition of 4-bit number using parallel adder is difficult due to delay in the circuit. This can be overcome with the help of carry look ahead adder circuit. In this question you are required to add the below 4-bit number by using the Carry Look ahead adder shown below. a) The value of A = 1101 B = 1111 b) The value of A = 1111 B= 1011 A B A1 81 Ce Ao Bo Co Comb Ckt Comb Ckt Comb Ckt As B Ca Az B2 C2 At Bt Ct Ao Bo Co Full Adder Full Adder Full Adder Full Adder C4 S3 C3 S2 C2 S1 C1 So Figure Q1
Question 1) Figure Q1 shows a Carry Look Ahead Adder which can be designed from four (4) full adder. Addition of 4-bit number using parallel adder is difficult due to delay in the circuit. This can be overcome with the help of carry look ahead adder circuit. In this question you are required to add the below 4-bit number by using the Carry Look ahead adder shown below. a) The value of A = 1101 B = 1111 b) The value of A = 1111 B= 1011 A B A1 81 Ce Ao Bo Co Comb Ckt Comb Ckt Comb Ckt As B Ca Az B2 C2 At Bt Ct Ao Bo Co Full Adder Full Adder Full Adder Full Adder C4 S3 C3 S2 C2 S1 C1 So Figure Q1
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text:Question
1) Figure Q1 shows a Carry Look Ahead Adder which can be
designed from four (4) full adder. Addition of 4-bit number
using parallel adder is difficult due to delay in the circuit. This
can be overcome with the help of carry look ahead adder
circuit. In this question you are required to add the below 4-bit
number by using the Carry Look ahead adder shown below.
a) The value of A = 1101
B = 1111
b) The value of A = 1111
B= 1011
A BO A1 B1 C0
Ao Bo Co
a te A A ca
Comb Ckt
Comb Ckt
Comb Ckt
As Ba
Ca
A2 B2 C2
A1 B1
C1
Ao Bo Co
Full Adder
Full Adder
Full Adder
Full Adder
C4
S3
C3
S2
C2
S1
C1
So
Figure Q1
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