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4bit binary subtractor 
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#1
Mar2105, 07:11 PM

P: 6

Hello folks :
the task is to design a circuit which subtracts 4 bit binary number a3,a2,a1,a0 and b3...b0. the MSB is a sign bit. Assume that you are given halfadders and fulladders, i.e. you don't have to design the logic of the halfadder or full adder chip. the two numbers are fed into the circuit on 2 serial lines and the output is also read out serially. Please have look at the attachement and Let me know if its Correct!!! Thanks!!! electro ;) 


#2
Mar2205, 02:27 AM

P: 6

c'mon jack asses move ur *** and check the ans. atleast!!
or r u all That dumb??? 


#3
Mar2205, 01:35 PM

P: 53

c = a  b (1)
c = a + 2comp(b) (2) c = a + ~b + 1 (3) All three equations are equivalent. Surely you can implement equation 3 on your own, especially since you have adders available. Or are you that dumb? 


#4
Mar2205, 05:41 PM

P: 6

4bit binary subtractor
You didn't tell me anything about the "figure" attached I just wanted to know if its OK ? u 


#5
Mar2405, 12:37 AM

Sci Advisor
HW Helper
P: 1,326




#6
Mar2505, 01:17 AM

P: 6

Or may be u're not "good enough" to see the answer and if wrong, "steer" as you say, in the right direction! 


#7
Mar2905, 06:22 AM

P: 410

KM 


#8
Mar2905, 02:41 PM

P: 531




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