[sdiy] Noninverting precision half-wave rectifier?

[David G. Dixon]

> <<Did it give the lopsided output I described?>>

> If I followed your description correctly, yes. This makes sense when the
> second stage of the full wave rectifier is considered, actually it is
> detailed in the Fig 7-9 for the Positive and Negative case.

Yup.
 
> It is more interesting when one of the diodes is reversed, but I think it
> is then just a case that you described as:
> 
> <<...a (non-inverting)precision diode ... high input impedance but suffers
> from slew-rate distortion at high frequencies (depending on the opamp
> used)...>>

Hmm.  Not sure.

> The output is half wave rectified but the output behind the diode is
> hitting
> the rail leading to the slew rate issue you described. This distortion is
> very apparent at 2 kHz on a scope, I was using a TL074CN.

Yup.  Was the distortion audible?