PAIA 4720 VCO

[Harry Bissell]

The CA3401 is "pin compatible" with the LM3900. It sure has the "norton" input
structure... There is an internal difference in the intermediate stages...
Motorola has the LM2900,3900 MC3301, MC3401 on the same page...
the LM29-3900 has Vcc +32V, the CA3041 has Vcc +18V
Otherwise they are the same chip...

BTW my spice model for the "National" part did not behave... the Motorola part
works
so I'm inclined to believe the Motorola Schematic (the national might be
misleading...)

So build it !!! :^) Harry

Magnus Danielson wrote:

> From: "Doug Forbes" <av599 at lafn.org>
> Subject: PAIA 4720 VCO
> Date: Fri, 24 Dec 1999 13:38:49 -0800
>
> > Howdy,
> >
> > Do any of you have 4700 series schematics that you would like to trade ? I
> > have a few and am looking for the 4720 A schematic in particular. The 4720
> > (no A) schematic shows an LM3900 and the 4720-A module I have uses a CA3401.
> > I want to build a second VCO so any help would be appreciated.
>
> Check out Anders Sponton's website at http://omega.tellus.vallentuna.se/anders/
> If I recall correctly he has some 4700 schematics out there, if you have
> something he doesn't have I know he would love to get it.
>
> If only Anders had _space_ for just a fraction of the things he got schematics
> for he would have a rather nice suite of stuff.
>
> Hmm... Anders, maybe it's time to meet again...
>
> Cheers,
> Magnus