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natg9
Joined: 17 Jul 2008
Posts: 37
Helped: 7
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 20 Aug 2008 7:21 Combinational or Sequential Multipliers ????????? |
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Hi all
i have this doubt , as to which of the two is better in terms of area, timing ??
Combinational or Sequential Multipliers
please list out the various methods and advantages
thanks to all
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avimit
Joined: 16 Nov 2005
Posts: 415
Helped: 68
Location: Fleet, UK
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| 20 Aug 2008 11:57 Re: Combinational or Sequential Multipliers ????????? |
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Combinational multipliers are slow and take a lot of area.
Sequential multipliers are fast and take less area.
Sequential multipliers may take a number of clock cycles to produce a result. So even they can work on high frequency clock, but the latency in terms of absolute time go get an output may be more or equal to that of a combinational multiplier.
Hope it helps
Kr,
Avi
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craftor
Joined: 18 Aug 2008
Posts: 23
Helped: 2
Location: China
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| 20 Aug 2008 14:01 Combinational or Sequential Multipliers ????????? |
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Learning~
Craftor
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natg9
Joined: 17 Jul 2008
Posts: 37
Helped: 7
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| 21 Aug 2008 5:11 Re: Combinational or Sequential Multipliers ????????? |
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Hi Avimit
Now I am aware of the fact that inc combinational multipliers area is more and speed is slower then do we never use combinational multipliers i want to know this ?
i am in a project that demands higher speed so i have opted for a seq multiplier but i am not able to decide which seq multiplier will give me optimum speed
please reply pal
regards
natg
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avimit
Joined: 16 Nov 2005
Posts: 415
Helped: 68
Location: Fleet, UK
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| 21 Aug 2008 8:39 Re: Combinational or Sequential Multipliers ????????? |
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As I said the sequential mutliplier can use a number of clock cycles, it may not be the best solution always. If the numbers you want to multiply are small, then a combi multipiler is ok, as it is very easy to code, and can be written as a * sign anywhere in the code. You will hardly see a seq multiplier if 2 small numbers are being multiplied.
Kr,
avi
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natg9
Joined: 17 Jul 2008
Posts: 37
Helped: 7
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| 21 Aug 2008 14:10 Re: Combinational or Sequential Multipliers ????????? |
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Hi Avi
ok to be specific for my case i will be building a 8X8 multiplier
so is combinational better here
thanks for the earlier replies
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