Saw Frequency doubler and Phase Shifter

[Bjorn Julin]

Hi.

Well i tried a TL082,072 LF353 even a 5532 and
all do fine above 10khz without amplitude shift
or any serious skewing of the waveshape.

It works just fine.

BJ

>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

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