Thanks

EC

"KJ" <(E-Mail Removed)> ???

??????:(E-Mail Removed)...

On Oct 8, 8:34 am, "Bar Nash" <(E-Mail Removed)> wrote:

> Hi all

>

> When a multipler is designed like those used in FIRS will the nature of

> the

> multiplicands influence the structure of it ?

>

> I mean in case those are both fractional numbers <1 and in case both are

> whole numbers .

>
It shouldn't. I'm assuming your question is targetted towards

multipliers meant to be synthesized, that being the case the first

step would be to define how you plan to represent numbers in general.

Depending on the particular needs of your FIR filters the numbers will

likely be either fixed point or floating point. Fixed point

representation will consume less logic than floating point but either

can be synthesized.

If you use the relatively newly standardized fixed or floating point

packages as the basis for representing 'numbers' then the answer to

your question is 'no, the structure of the multiplier will not be

influenced by the nature of the multiplicands'.

For more info on these packages, root around at vhdl.org. The link

below takes you to the user's guide for the fixed point package.

http://www.vhdl.org/vhdl-200x/vhdl-2...s/Fixed_ug.pdf
Kevin Jennings