[sdiy] Re: Doing it all in 4069s

[Magnus Danielson]

From: patchell <patchell at silcom.com>
Subject: Re: Doing it all in 4069s (Was: Re: [sdiy] New Vco (new images))
Date: Sat, 29 Sep 2001 08:17:40 -0700

Hi Jim,

>     Another good canidate part is the CD4007.  RCA used to have another
> similar part, I think it was the CA3600.  The part has 6 mosfets in it.
> Two are committed as a CMOS inverter.  The other four have their drains
> uncommitted (the sources are tied to the power supply rails), I can't
> remember what they did with the gates...oh yes, the gates of each pair are
> connected together...but, this part might offer a little more flexability
> in certain designs...if you can still get them of course.

Indeed. But the point of the exercise was to show that one can use a
"digital" component as a pretty versatile analogue component.

We have seen several cases where 4069s (and others) have been used,
but I have seen no example of the full bounty synth done with only one
of them.

Hmm... I kind of like the taste of this the more I think about it ;O)

Cheers,
Magnus