[sdiy] Buffer question

[ChristianH]

On Tue, 31 Jan 2012 17:14:44 +0100 Ingo Debus <igg.debus at t-online.de> wrote:

> Am 30.01.2012 um 23:01 schrieb Oren Leavitt:
> 
> >> 
> >> Quick question, if I'm using a 4013 or 4520 for generating sub
> >> octaves, do I need to put an op amp on the output to buffer it or can
> >> I send the output straight to a jack?
> >> 
> >> -Ian (full of stupid questions) Smith
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> >> 
> > 
> > 
> > Ian,
> > I would buffer it and level shift it to +/-5V with an op amp.
> > CMOS will latch and release the "magic smoke" if something in the "outside world" pulls its output above the Vdd pin.
> 
> So the opamp would be killed instead of the CMOS chip, no? Is there anything gained?


Well, the opamp may be more robust. 
At least if it's made from cast iron, like the 741...

Christian