On Wed, 01 Apr 2015 14:07:40 -0700, RobertMacy
wrote:
On Wed, 01 Apr 2015 12:08:34 -0700, Jim Thompson
wrote:
...snip...
"For a simulation situation..." ;-)
John F and Lasse have provided how to do it.
...Jim Thompson
For simulation I'd use the built-in rand() function of LTspice, if you
want gaussian instead of uniform distribution, use five rand()'s summed
appropriately. You said you like to use PSpice only, so create a text file
to use in a PWL type thingy THEN you can get completel control, likw
distribution and the elusive 1/f etc, any type statistics you want.
For Hardware to not have to go buy much, use the Soundcard and run it
directly with either a repeating pattern of random values, or from a
random number generator to get very long runs. The method of converting
FROM the audio output [BW is 10Hz to approx 100kHz] is left to the
'student'] The point here is that you can get repeatable random sequences
that are completely under your control.
I'm after "random" as in numbers 1-16, which will turn on specific I/Q
components of a modulation "constellation", such as 16-QAM... building
a carrier extractor with AGC and needed a stimulus ;-)
...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice
480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at
http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.