Re: Precision low frequency generation

On 11/20/07 1:01 PM, in article 13k6ionq551uja3@xxxxxxxxxxxxxxxxxx, "Robert
Baer" <robertbaer@xxxxxxxxxxxx> wrote:

cbarn24050@xxxxxxx wrote:

On Nov 20, 2:10?pm, Dirk Bruere at NeoPax <dirk.bru...@xxxxxxxxx>
wrote:

I'm thinking of creating a precision low frequecy generator (<20HZ) by
taking a computer generated stereo sinewave output with (say) one
channel o/p 5000Hz and the other (say) 5002.5Hz, feeding into a
summing input of an op amp and then putting the signal through a low
pass filter to recover a 2.5Hz sine wave. Do you think this will work,
or have I missed something?

Dirk


A whole lot simpler to produce the 2.5Hz signal directly from your
computer.
Why, pray tell, use a thousand dollar power sucking hog to do this?
There are plenty of simple, small, low power discreet circuite as
aell as ICs that can be used for this project.

I suspect that is none of our business.

.