[sdiy] Re: Inexpensive 16 bit DAC?

[Harry Bissell Jr]

Yes there is a reason, the bits will not
line up unless this is a linear circuit.

PMI made a DAC that used linear segments between
exponential endpoints... effectively switching the
reference for the top and bottom of the string.

Or use a multiplying DAC and feed the output back to
the reference

H^) harry


--- "Roy J. Tellason" <rtellason at blazenet.net> wrote:
> On Wednesday 27 April 2005 08:42 am, Ray Wilson
> wrote:
> > Here is a DAC with CD40106 and CD4066 chips. I
> have demo'd 4 bits but you
> > could go as many as you had patience to build.
> >
> > Ray
> 
> Interesting circuit,  but that one would seem to
> benefit some from having its 
> own onboard regulators,  perhaps even ones that you
> could trim.
> 
> Any reason this can't be done,  perhaps with a few
> more bits,  to give the 
> same response as a log-taper pot?
> 
> 
> 
> 
> 
> 
>