SV: [sdiy] analogue equations, AD633

[Fred Weed]

Music From Outer Space sells a bare ring modulator PCB board (4.4" x 3.5")
which uses the AD633.   Check out 
http://www.musicfromouterspace.com/analogsynth/RINGMODULATOROCT2007/RINGMODU
LATOROCT2007.html

Or search www.musicfromouterspace.com/ for Sonic Multiplier.

- Fred

> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl 
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Ian Smith
> Sent: Thursday, June 26, 2008 11:08 PM
> To: synth-diy at dropmix.xs4all.nl
> Subject: RE: SV: [sdiy] analogue equations
> 
> 
> 
> 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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