calling the experts: converting an analog signal to digital

[dev]

Hi all,
I would like to find one of the most simple ways to convert an analog signal into a digital signal and then convert the digital signal back to analog using one or two IC's.  Sound quality is not too important as long as the digital component can take in smaller analog signals like clean guitar high strings.  If someone can point me in the dirrection of some IC chips to look into I woud appreciate it.  Maybe some of the IC's used for digital delays would work?

thanks in advance
Dev

[R.G.]

I for one would like to do the same thing... 8-)

[Peter Snowberg]

It's pretty easy to do with a couple of chips (figure at least 4 including an op-amp, an oscillator, the A/D and the D/A).

I can point you to some part numbers if I know a little more about what you want to do. The two easiest ways to kill a signal with A/D/A are to reduce the dynamic resolution by leaving out bits, or reduce the temporal resolution by lowering the sampling rate so that you start generating "aliasing" as you limit the highest frequencies being passed.

One set of chips would be...

- TL074 for filtering and buffering
- CD4046 PLL for an oscillator
- ADC0803 for the A/D
- DAC0831 for the D/A

Once you have a framework, you can do all sorts of odd stuff like swapping bits, inverting bits, and other mischief.

Take care,
-Peter

[kdawg]

Check out http://www.epanorama.net/links/audiocircuits.html#digital, you might find some circuits there useful

-kdawg