[sdiy] TDA7052A as VCA

Steve Carter synth at willacy.co.uk
Wed Jun 30 17:47:40 CEST 2010


And of course there's the TCA730A which is a DC control stereo volume and balance IC with DC control for each function.  Nice IC and it has a companion chip, the TCA 740A which does DC control of stereo tone controls.  Both ICs from around 30 years ago.

Steve

On 30 Jun 2010, at 04:36, nicolas wrote:

> Another interesting candidate for this sort of thing is the LM1036.  It is stereo, but not two independent CVs.  Can be used for parallel stereo VCAs or pan or crossfade.  Has included EQ filters (6db slope).  I haven't tried it, but it has been used in a synth context and written up here: http://www.mindspring.com/~clist/resource/circuits/LM1036Mixer.html
> 
> Cheers,
> Nicolas
> 
> --- On Tue, 29/6/10, Ingo Debus <igg.debus at t-online.de> wrote:
> 
>> From: Ingo Debus <igg.debus at t-online.de>
>> Subject: [sdiy] TDA7052A as VCA
>> To: "Synth DIY" <synth-diy at dropmix.xs4all.nl>
>> Received: Tuesday, 29 June, 2010, 7:57 AM
>> Hello all,
>> 
>> in the current Elektor issue there's a circuit "Guitar
>> compressor without CA3080". Obviously they're using a
>> TDA7052A as VCA. This is a small power amplifier IC (0.5
>> watts) including a log VCA. Probably not the world's
>> cleanest VCA, but very cheap. Gain control range is 75dB
>> minimum according to the data sheet. Anyone tried it?
>> 
>> Ingo
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> 
> 
> 
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