Hex VC mixer

[Hairy Harry]

All 4049 are "UB"  (unbuffered). They are just a complimentary pair
for each inverter.

You might also they the 4007 which lets you get to individual
trannies...

H^)  harry


>From: "Curtin, Steven D (Steven)" <sdcurtin at lucent.com>
>To: paul.maddox at ndirect.co.uk, "'Magnus Danielson'" <cfmd at swipnet.se>
>CC: synth-diy at node12b53.a2000.nl
>Subject: RE: Hex VC mixer
>Date: Mon, 24 Jul 2000 11:11:31 -0400
>
>It also seems that that the UB 4049s are in good supply.  A quick check of
>the Digikey and Mouser catalogs indicates stock of them, in fact for 
>surface
>mount they only stock the UBs, maybe for speed?   Since the parts are
>available in surface mount, you could make a hex VCA that is REALLY small!
>
>Steve C
>
>-----------------------------------------------------------------
>Steven Curtin
>Lucent Technologies Microelectronics
>ph: (732)949-4404   fax: (732)949-6711
>http://curtin.emf.org
>sdcurtin at lucent.com
>-----------------------------------------------------------------
>
>
> > ----------
> > From: 	Magnus Danielson[SMTP:cfmd at swipnet.se]
> > Sent: 	Monday, July 24, 2000 11:01 AM
> > To: 	paul.maddox at ndirect.co.uk
> > Cc: 	cfmd at swipnet.se; synth-diy at node12b53.a2000.nl
> > Subject: 	Re: Hex VC mixer
> >
> > From: "Paul Maddox" <paul.maddox at ndirect.co.uk>
> > Subject: Re: Hex VC mixer
> > Date: Mon, 24 Jul 2000 09:39:18 +0100
> >
> > > Magnus,
> >
> > Paul,
> >
> > >   I built one and tested it.. works a treat and has no noise that I
> > could
> > > hear.
> >
> > Oh, did you build it from the directions I gave or?
> >
> > > The input signals you need to be careful of, it overdrives very 
>easily.
> > > Quick change of a resistor and it now handles 10V p-p signals :-)
> >
> >  ;)
> >
> > The two resistors per transistor/gate is required to be of equal
> > resistance
> > for optimum linearity.
> >
> > > Im going to use this in my polysynth design.
> >
> > Oh, these 4049UB based VCAs etc seems to catch on ;)
> >
> > Cheers,
> > Magnus
> >

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