Small VCA (was Re: [sdiy] Basic 4th order LP butterworth filter papers)

[Tom Wiltshire]

You could try the CA3080 VCA instead, Paul. Mind you, you've probably  
considered that.

At only 8-pins it's quite a bit smaller than the LM13700, and it  
might perform better than the transistor VCA. But not by much!

T.

(No faith in the 3080)

On 5 Feb 2010, at 07:57, Paul Maddox wrote:

> Aaron
>
> :-)
>
> I am, I'm just curious, sure it may not be the most exciting thing in
> the world, but it's VERY small, and right now I'm after a very very
> small foot print filter for a project.
>
> I've been following the simple VCA thread, and an LM13700 is too big
> for me, so I'm going to be playing with the single/dual transistor
> VCAs.
>
> Paul
>
> On 5 February 2010 07:09, Aaron Lanterman <lanterma at ece.gatech.edu>  
> wrote:
>> On Feb 5, 2010, at 1:50 AM, Aaron Lanterman wrote:
>>
>>> On Feb 5, 2010, at 1:45 AM, Paul Maddox wrote:
>>>
>>>>> Like this, or something else?
>>>>> http://focus.ti.com/lit/ds/symlink/tlc14.pdf
>>>>
>>>> How do these sound in a synth?
>>>> has anyone ever tried them?
>>
>> Whoops, ignore my last note on slopes and ripple, I just realized  
>> Paul was probably asking about this particular switched capacitor  
>> chip, and probably not asking about Butterworths in general. ;)
>>
>> - Aaron
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