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Recent questions tagged carrygenerator
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Morris Mano Edition 3 Exercise 5 Question 6 (Page No. 198)
(a) Redefine the carry propagate and carry generate as follows: $P _i = A _i + B _ i$ $G _i = A _iB _i$ ... circuit for this IC. [Hint: use the equation substitution method and ANDORINVERT funtion given in part (a) for $C _{i+1}$
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Apr 3, 2019
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Morris Mano Edition 3 Exercise 5 Question 5 (Page No. 198)
Using the ANDORInvert implementation procedure, show that the output carry in full adder can be expressed as $C _{i+1} = G _i + P _iC _i = (G _i'P _i + G _i'C _i')'$ IC type 74182 is a lookahead carry generator MSI ... $C _1'$).
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Apr 3, 2019
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Full adder
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Nov 15, 2018
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Na462
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Ripple carry adder
Refer : https://gateoverflow.in/8250/gate2015248 Here i dont understood how they calculated 12ns . I got that the first full adder will take 4.8ns time at that 4.8 ns we'll get the carry as well as the sum, in that duration the first XOR Ai xor Bi ... for subsequent operands but for final sum the carry first need to be propagated through all full adder first Why 4.8 + 3*2.4 ??
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Nov 13, 2018
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Na462
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Full Adder
The Cout function of a 3bit adder is as follows: AB + Cin (A ⊕ B)  i It, being a majority function, can also be written as: AB+BCin+CinA which is equivalent to AB + Cin (A+B)  ii So, if we consider eqn i and ii, doesn't it show that (A ⊕ B) = (A+B). What am I missing here?
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Oct 18, 2018
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superak96
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Full adder
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Oct 1, 2018
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Na462
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Adder
One ripple carry adder is adding two nbit integers. The time complexity to perform addition using this adder is (We know carry look ahead adder takes time log n. Is it similar for other adders too). Plz also share some good resource about these two adders
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May 21, 2018
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srestha
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CLA and RCA delays.
How to analyse the delays of Ripple carry adder and Carry look ahead adder. Please explain with Example.
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Dec 30, 2017
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AnilGoudar
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Carry lookahead adder
can anyone tell me wat is the right equation for carry generator in carry lookahead adder ?? Confused .. $ C_{i} = G_{i}+P_{i}C_{i1}$ $ C_{i+1}=G_{}i+P_{}iC_{}i$
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Dec 19, 2017
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Digital Logic
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Puja Mishra
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10
Ripple Carry Adder
Q.A one bit full adder takes 75 nsec to produce sum and 50 nsec to produce carry.A 4 bit parallel adder is designed using this type of full adder. The maximum rate of additions per second can be provided by 4 bit parallel adder......?
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Dec 8, 2017
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11
Doubt on overflow condition in case of carry propagated
The condition for overflow in the addition of two 2's complement numbers in terms of the carry propagated by the two most significant bits is ___________.
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Nov 3, 2017
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Tuhin Dutta
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12
Count the no of various Gates required in Carry Generator and look ahead adder
Count the 2 Input And, OR and EXOR gates required in Carry Generator and Look ahead adder. Note : In the question it is asking about 2 input, not multiple input, for Multiple input AND gates in n bit carry generator we require (n(n+1))/2 and OR Gates n.
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Sep 30, 2017
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Which expression is right with respect to carry look header?
(i) Ci +1= Gi+ PiCi (ii) Ci +1= G(i+1) + P(i+1)Ci https://www.youtube.com/watch?v=9lyqSVKbyz8&index=116&list=PLBlnK6fEyqRjMH3mWf6kwqiTbT798eAOm i or ii ?
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Sep 7, 2017
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hem chandra joshi
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14
MadeEasy Test Series: Digital Logic  Carry Generator
The number of AND gates are present inside a 5bit carry look ahead generator circuit are ______.
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Jan 13, 2016
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Sandeep Singh
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15
GATE200636
Given two three bit numbers $a_{2}a_{1}a_{0}$ and $b_{2}b_{1}b_{0}$ and $c$ ...
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Sep 22, 2014
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gate2006
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+39
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3
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16
GATE200735
In a lookahead carry generator, the carry generate function $G_i$ and the carry propagate function $P_i$ for inputs $A_i$ and $B_i$ are given by: $P_i = A_i \oplus B_i \text{ and }G_i = A_iB_i$ The expressions for the sum bit $S_i$ and the carry bit $C_{i+1}$ of the look ... bit adder with $S_3, S_2, S_1, S_0$ and $C_4$ as its outputs are respectively: $6, 3$ $10, 4$ $6, 4$ $10, 5$
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Sep 22, 2014
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Digital Logic
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Kathleen
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