[time-nuts] cordic

dk4xp at arcor.de dk4xp at arcor.de
Tue Jun 21 15:24:09 UTC 2011


> So then, it's a trade between a big ROM LUT or a bunch o'gates for 
> CORDIC.  And for big N the bunch o'gates is probably going to be easier: 
> 16 bit phase and wanting 16 bits out would be a 64kbit ROM (assuming you 
> didn't do the usual thing of only needing 1/4 cycle)..

There is also the Sunderland technique that can reduce the table size
by a factor of 12 to 50 by splitting the table into 3 small ones and
combining them with simple arith.


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