SV: [sdiy] analogue equations

[Tom Farrand]

Let us not forget the AD538.  Is pricey, but like AD633 on steroids as
far as what equations might be implemented.  I think the AD538 more
capable for this application but YMMV.

Peace.
Tom Farrand


On Fri, Jun 27, 2008 at 1:08 AM, Ian Smith <taciturn_unquiet at hotmail.com> wrote:
>
> Karl,
>
> Hey, that AD633 looks nice. I just downloaded the datasheet for it and it has some really nice properties. Thanks for pointing that out. I think I'm going to start throwing together a schematic. I wonder what else can be done with this idea...
>
> -Ian
>
> ----------------------------------------
> > Date: Fri, 27 Jun 2008 05:04:49 +0000
> > From: elektrodwarf at yahoo.se
> > Subject: SV: [sdiy] analogue equations
> > To: synth-diy at dropmix.xs4all.nl; taciturn_unquiet at hotmail.com
> >
> > Hi Ian
> >
> > I've been thinking of something similar but way simpler just using a AD633 four quadrant multiplier, this little chip can do multiplication, squaring, square rooting, division etc. I'm guessing any four quadrant multiplier could be used to do the same operations.
> >
> > Karl
> >
> >
> > --- Den fre 2008-06-27 skrev Ian Smith :
> >
> >> Från: Ian Smith
> >> Ämne: [sdiy] analogue equations
> >> Till: synth-diy at dropmix.xs4all.nl
> >> Datum: fredag 27 juni 2008 06.22
> >> hello all,
> >>
> >> Time for another weird Ian question/idea... I've been
> >> playing around with Analog Box (software modular synth
> >> thing, quite brilliantly done) and something you can do
> >> with it is have various mathematical equations that you can
> >> send waves through, e.g. x*(y+sinx) where x and y are the
> >> inputs to the block. I was wondering if it's possible
> >> to do this sort of thing in the analog patch cord world...
> >> do things like Sin and Cos and square roots. I know you can
> >> add two inputs because that's what a mixer does.
> >>
> >> And now for the odd idea... I'm envisioning a module
> >> with two inputs (say x and y) and four 12 position rotary
> >> switches that would send the inputs through various math
> >> functions and between each rotary have a DPDT switch that
> >> would switch between adding or multiplying the output of
> >> the previous rotary to the next one. I was thinking for the
> >> math functions: x+y, x-y, x*y, x/y, Sin x, Sin y, Cos x, Cos
> >> y, x*x, y*y, square root of x, square root of y. again, if
> >> all of these are possible.
> >>
> >> If people want, or if my description isn't clear, I can
> >> draw up a flow chart type schematic of this.
> >>
> >> -Ian Smith
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