s to r

[Theo Hogers]

Hi all.
To go from Square to Ramp there are a few options.
The two that I like best are:
1) Put a square and a sine wave thru a ring mod (the roland D50 works that
way).
2) Use the square to trigger a short pulse, use this pulse to reset a linair
ramp.
    The down side of this is that the amplitude of the saw wave becomes
smaller as the frequentie rises.
    A freq. to voltage converter and a vca can be used to correct this, but
it works not 100% perfect.
    (used this approach for a kind of audio driven synth ones.)

Cheers Theo


----- Original Message -----
From: Harry Bissell <harrybissell at prodigy.net>
To: farky <farky at ix.netcom.com>
Cc: <synth-diy at node12b53.a2000.nl>
Sent: Sunday, March 12, 2000 4:28 AM
Subject: Re: s to r


> Toby:
>
> you sense both edges of the square wave (rising/falling) and then reset
> a cap that is charged or discharged by a constant current source. The
> problem is it only works for
> one frequency of square wave, unless you make the constant current
> source track the
> frequency.
>
> Anybody have a better way? I need this too... but will probably not
> bother because its
> such a bitch !!!
>
> H^)   harry
>
> farky wrote:
>
> > How do you make a square to ramp converter?
> >
> > toby
>