[sdiy] help with clicks on VCA

[Dan Snazelle]

Slewrate limiting followed by a lowpass should help a lot.
Perhaps use something like TLC27L

i am not familiar with this chip...i have a lot of them though. they are a single supply
opamp right?


also...for a lowpass...can i just use a resistor and a cap?

thanks




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----------------------------------------
> Date: Mon, 17 Aug 2009 15:27:31 +0300
> From: ajhuovil at cc.hut.fi
> To: subjectivity at hotmail.com
> CC: synth-diy at dropmix.xs4all.nl
> Subject: RE: [sdiy] help with clicks on VCA
>
> On Mon, 17 Aug 2009, Dan Snazelle wrote:
>
>> it happens with square waves too even with saws
>
> Square has two sharp edges, saw one. Only difference is the number of
> clicks per cycle.
>
>> from what i have been reading this is a very common problem with tremolos
>
> Slewrate limiting followed by a lowpass should help a lot.
> Perhaps use something like TLC27L2?
>
> On related note, is there some way to artificially slewrate limit an opamp
> circuit without affecting the gain-bandwidth product?
>
> Antti
>
> "No boom today. Boom tomorrow. There's always a boom tomorrow"
> -- Lt. Cmdr. Ivanova