Re: A Question

> From: sara karami
...
> i want to generate high frequency noise with fpgas
...
> with which IC or with which software?
...

Others have mentioned LFSRs, which might be exactly what you are looking for.

An alternative is "true hardware random number generators", such as
the "Whirlygig RNG".
The people at the "Way of the exploding head" (?) have documented that
random number generator extremely well, including exactly what chips
and what software was used.
"The Design and Analysis of a True Random Number Generator in a Field
Programmable Gate Array" by Paul W. Kohlbrenner is a similar system.

.. _LFSR http://en.wikipedia.org/wiki/LFSR
.. _"Whirlygig RNG" http://warmcat.com/_wp/whirlygig-rng/
.. _"The Design and Analysis of a True Random Number Generator in a
Field Programmable Gate Array"
http://teal.gmu.edu/courses/Crypto_resources/web_resources/theses/GMU_theses/Kohlbrenner/Kohlbrenner_Fall_2003.pdf

--
David Cary
1.918.813.2279
http://carybros.com/