[sdiy] Negative content on half wave rectifier

[David G Dixon]

> I was recently warned off using a single 1N4001 as a half 
> wave rectifier so I started playing with op-amp based 
> versions. I settled on the 'Improved Precision Half Wave 
> Rectifier' in Fig. 3 here: 
> http://sound.westhost.com/appnotes/an001.htm
> 
> ...snip...

I know you fixed the problem already, cuz I read ahead a few emails.
However, I just wanted to say that I've used both Figure 3 and Figure 6
circuits.  I like them both for different reasons.  For saw or triangle
shaping, it's important to add the suggested cap to minimize the glitch.
It's also important to add a cap across the feedback loop of the final
opamp.

In any case, both of these HWR circuits work perfectly.