[sdiy] UA726 was: new Texas ic log102 ? log ratio amp

[Chris Crosskey]

What about the SSM quad arrays or that chip that is four 2N3904's (and
theres a quad 2N3906 IIRC) or do you need five trannies?

chrisc

> -----Original Message-----
> From: Magnus Danielson [mailto:cfmd at swipnet.se]
> Sent: 05 April 2002 11:20
> To: urekar.m at EUnet.yu
> Cc: chris.crosskey at vicon.com; synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] UA726 was: new Texas ic log102 ? log ratio amp
> 
> 
> From: ">>>marjan<<<" <urekar.m at EUnet.yu>
> Subject: Re: [sdiy] UA726 was: new Texas ic log102 ? log ratio amp
> Date: Fri, 05 Apr 2002 12:07:52 +0200
> 
> > 
> > > 
> > > Well... I have been considering building a uA 726 clone around a
> > > 3046. I don't know if the 3046 is the ideal, but I'll use it as a
> > > start. The uA 726 is a really simple circuit, so it 
> should be possible
> > > to make a beleivable clone of it.
> > 
> > 
> > maybe mat04 would do better ?
> 
> It would undoubtably be that, but since I have a bunch of 3046s lying
> around I thought about giving them a go.
> 
> However, the MAT-04 is one step (or actually one transistor) in the
> wrong direction. For best behavious all transistors in the setup
> should be tightly thermically connected. Allready at the CA3046 that
> is an issue, the MAT-04 is one transistor less. Not all that ideal I
> fear.
> 
> Anybody got some fab-capacity to hand me? ;O)
> 
> Cheers,
> Magnus
> 

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