[sdiy] LM741 substitute
tom at electricdruid.net
Fri Jul 10 22:09:50 CEST 2009
On 10 Jul 2009, at 19:21, David G. Dixon wrote:
>> Also, some rare curcuits do depend on the internal layout of a
>> particular op-amp. Jürgen Haible reported on one such design in the
>> Synthi-A project he did. It's deep into the archives, but google
>> help you.
> I can't see any excuse for such a design. Doesn't that just defeat
> whole point of opamps?
I'm inclined to agree. Any design that depends *specifically* on the
failings of a particular chip isn't a particularly good design in my
view. If you want limited slew rate, design it in. Chip
specifications change, and you should try to allow for that if you
want a design to survive.
The difficulty is the guitar FX, where things that *were* failings of
the original design have now become the desirable features. Still, I
know from experience that you can still design a noisy, dirty, hissy
fuzz pedal with a modern, low-noise op-amp!
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