T transgalactic Banned Apr 29, 2008 #1 i need to build a comparator of 2 numbers (each number has two bits) i think that we should subtruct them and if the last bit (sign bit) equals to one then the top number is smaller but here i get a totaly different solution i cant unerstand it: **broken link removed**
i need to build a comparator of 2 numbers (each number has two bits) i think that we should subtruct them and if the last bit (sign bit) equals to one then the top number is smaller but here i get a totaly different solution i cant unerstand it: **broken link removed**
ericgibbs Well-Known Member Most Helpful Member Apr 29, 2008 #2 transgalactic said: i need to build a comparator of 2 numbers (each number has two bits) i think that we should subtruct them and if the last bit (sign bit) equals to one then the top number is smaller but here i get a totaly different solution i cant unerstand it: **broken link removed** Click to expand... hi, Get the datasheet for the HEF4585 4bit magnitude comparator i/c
transgalactic said: i need to build a comparator of 2 numbers (each number has two bits) i think that we should subtruct them and if the last bit (sign bit) equals to one then the top number is smaller but here i get a totaly different solution i cant unerstand it: **broken link removed** Click to expand... hi, Get the datasheet for the HEF4585 4bit magnitude comparator i/c
T transgalactic Banned Apr 30, 2008 #3 i know that implementation i am asking about the logic of FS implementation ?? personally i thought if we substract the two input numbers then we should know who is bigger by looking at the last bit (the sign bit) but here they are doing some other thing what are they doing here: **broken link removed**
i know that implementation i am asking about the logic of FS implementation ?? personally i thought if we substract the two input numbers then we should know who is bigger by looking at the last bit (the sign bit) but here they are doing some other thing what are they doing here: **broken link removed**
ericgibbs Well-Known Member Most Helpful Member Apr 30, 2008 #4 hi, Looked at the link, I cannot identify what the square blocks are supposed to represent.????
T transgalactic Banned Apr 30, 2008 #5 this squares are only the background paper this squares are only the background paper Last edited: Apr 30, 2008
ericgibbs Well-Known Member Most Helpful Member Apr 30, 2008 #6 transgalactic said: this squares are only the background paper Click to expand... I dont mean the paper grid.! The blocks with Fs and Hs written in them...
transgalactic said: this squares are only the background paper Click to expand... I dont mean the paper grid.! The blocks with Fs and Hs written in them...
ericgibbs Well-Known Member Most Helpful Member Apr 30, 2008 #8 transgalactic said: its B (borrow) and D (the resolt) Click to expand... hi. This is an extract from the HEF4585 datasheet that I refered to earlier. Its just the bottom two elements of the magnitude comparator. Last edited: Jul 7, 2008
transgalactic said: its B (borrow) and D (the resolt) Click to expand... hi. This is an extract from the HEF4585 datasheet that I refered to earlier. Its just the bottom two elements of the magnitude comparator.
T transgalactic Banned Apr 30, 2008 #9 i am femiliar with this implementation i am looking for the FS implementation
Papabravo Well-Known Member Most Helpful Member Apr 30, 2008 #10 By analogy with adders, where we have the half adder and the full adder, and going out on a limb I'm guessing that Fs stands for Full Subtractor. I think it is fair to say that if you want help on this forum you might want to reconsider the churlish attitude you are displaying.
By analogy with adders, where we have the half adder and the full adder, and going out on a limb I'm guessing that Fs stands for Full Subtractor. I think it is fair to say that if you want help on this forum you might want to reconsider the churlish attitude you are displaying.
ericgibbs Well-Known Member Most Helpful Member Apr 30, 2008 #11 Papabravo said: I think it is fair to say that if you want help on this forum you might want to reconsider the churlish attitude you are displaying. Click to expand... Thanks PB, I thought it was just me who thought his manner a little brusque.
Papabravo said: I think it is fair to say that if you want help on this forum you might want to reconsider the churlish attitude you are displaying. Click to expand... Thanks PB, I thought it was just me who thought his manner a little brusque.
T transgalactic Banned Apr 30, 2008 #12 in this post i have presented a question and the effort i tried to understand it how to implement a comparator using FS(full substructor) components ??? in the top thread there is a circuit that suposedly implements it but i cant understand the logic behind it ?????? Last edited: Apr 30, 2008
in this post i have presented a question and the effort i tried to understand it how to implement a comparator using FS(full substructor) components ??? in the top thread there is a circuit that suposedly implements it but i cant understand the logic behind it ??????
blueroomelectronics Well-Known Member Apr 30, 2008 #15 transgalactic said: fs=full substructor Click to expand... Probably help if you could spell it right.
transgalactic said: fs=full substructor Click to expand... Probably help if you could spell it right.
ericgibbs Well-Known Member Most Helpful Member Apr 30, 2008 #16 transgalactic said: i have presented a question and the effort i tried to understand it how to implement a comparator using FS(full substructor) components ??? ?????? Click to expand... Hi, It was difficult to follow your question, the problem is that many abbreviations, like Fs, can mean different things when no context is given. I Googled for Full subtractor got these results. Do they answer your question,? **broken link removed** **broken link removed** **broken link removed**
transgalactic said: i have presented a question and the effort i tried to understand it how to implement a comparator using FS(full substructor) components ??? ?????? Click to expand... Hi, It was difficult to follow your question, the problem is that many abbreviations, like Fs, can mean different things when no context is given. I Googled for Full subtractor got these results. Do they answer your question,? **broken link removed** **broken link removed** **broken link removed**
T transgalactic Banned May 1, 2008 #17 in those links there is no implementation of a comparator using Full subtractor components. so i need to decide that by the least digit of their subtraction which on is bigger????????? cause i need to build it using "full subtractor " components and i cant understand the circuit of the solution which i presented in the first thread
in those links there is no implementation of a comparator using Full subtractor components. so i need to decide that by the least digit of their subtraction which on is bigger????????? cause i need to build it using "full subtractor " components and i cant understand the circuit of the solution which i presented in the first thread