[sdiy] Electrosmith Eurorack DSP platform

cheater cheater cheater00social at gmail.com
Mon Jan 31 12:03:45 CET 2022


Gotcha, found it, thanks! Glad I asked - I glanced over it when I
first visited the link.

On Sat, Jan 29, 2022 at 5:27 PM Eric Brombaugh <ebrombaugh at gmail.com> wrote:
>
> That All-Electric link points to a digital delay that uses a 1-bit CMOS
> implementation of a sigma-delta ADC & DAC. That's a direct follow-up to
> the comment Mike Bryant made about his colleagues building such a
> circuit, and related to the PDM techniques I've done in FPGAs which we
> were discussing.
>
> Eric
>
> On 1/29/22 04:47, cheater cheater wrote:
> > Cool link Eric. Is there something on that page related to what we're
> > talking about? Not meant sarcastically, it's just a bit of a mess ...
> > I think I recognize it from years ago but not sure :)
> >
> > On Sat, Jan 29, 2022 at 12:49 AM Eric Brombaugh via Synth-diy
> > <synth-diy at synth-diy.org> wrote:
> >>
> >> Probably a good time to repost this link:
> >>
> >> http://all-electric.com/b&c.html
> >>
> >> Quirky, old chips, but there's a lot to learn from here.
> >>
> >> Eric
> >>
> >> On 1/28/22 14:25, Mike Bryant wrote:
> >>> Yes.  But if you put the sampler and comparator well away from the FPGA to avoid the noise, and smoothed the feedback well, you could get similar performance.
> >>>
> >>> When sigma-delta was first proposed someone at the place I worked built a demonstrator using 4000 series CMOS.  But it got killed by someone touching it without a wristband :-)
> >>>
> >>>
> >>> -----Original Message-----
> >>> From: cheater cheater [mailto:cheater00social at gmail.com]
> >>> Sent: 28 January 2022 20:23
> >>> To: Mike Bryant
> >>> Cc: Eric Brombaugh; synth-diy at synth-diy.org
> >>> Subject: Re: [sdiy] Electrosmith Eurorack DSP platform
> >>>
> >>> Right, but they didn't do that on a run of the mill fpga, right? They designed their own custom IC where everything was on one chip of silicon - the digital output, the integrator circuit, etc - do I have that right?
> >>>
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> >
>



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