RE(2): revisiting that Bode Phaser

[Martin Czech]

In the case of triangles a precision rectifier
circuit with the right bias and summing might give
what you need for quadrature.

It's only piecewiese linear functions.
A la Tietze-Schenk.

m.c.


:::X-Envelope-Sender-Is: Juergen.Haible at nbgm.siemens.de (at relayer 
lizzard.sbs.de)
:::From: Haible Juergen <Juergen.Haible at nbgm.siemens.de>
:::To: Martin Czech <czech at Micronas.Com>
:::Cc: synth-diy at node12b53.a2000.nl
:::Subject: RE(2): revisiting that Bode Phaser
:::Date: Wed, 29 Nov 2000 14:57:05 +0100
:::
:::> 	>Suggestions for multipliers?
:::> 	>Do you think that an external predistortion (antidistortion)
:::> 	>stage for a 1496 will be a good idea? Recently a parcel
:::> 	>from Reichelt arrived with some nice japanese dual transistors.
:::> 	>I think it could be worth a try to use them to upgrade the
:::> 	>1496 to the linear 1495.
:::> 
:::	>My first choice would be a couple of RC4200's - probably no
:::trimming
:::	>required (?) - bleedthru is hardly an issue at sub audio range !
:::	>[...]
:::	>What I want is a linear input CV that is converted to sine and
:::cosine
:::	>functions _over_several_periods_. Is there something like that ?
:::	>An EPROM / DAC even ?
:::
:::Stupid me. Make that EPROM triangles instead of sines (or use two simplified
:::Interpolating Scanners or wavefolders), and use the nonlinear inputs of the
:::1496 for sine shaping, just as I did in the FS-1.
:::Could turn out really simple.
:::
:::JH.
:::