Saw Frequency doubler and Phase Shifter

[Magnus Danielson]

From: jorgen.bergfors at idg.se
Subject: Re: Saw Frequency doubler and Phase Shifter
Date: Mon, 18 Sep 2000 8:56:22 +0200

> Hi Magnus and everybody else.

Hi Jörgen and everybody else who cares to read this...

> You really need a faster comparator than a TL082 for this to work
> satisfactorily. I used an LM318, and that was for LFO frequencies.
> For audio frequencies something even faster would be desirable. At least if
> you intend to do any further waveshaping on the output.

Jörgen is offcourse correct. My schematics is to display the general idea and
principle and does not convey all the practical details like slewrate etc.
which haunts a real design. The choice of TL082 is just as arbitrary as picking
an uA741, NE5532 or LF411. No real thougth has gone into that part of the
design.

The comparator part is really critical since it shall go basically rail-to-rail
in both directions quickly.

Cheers,
Magnus