[sdiy] CMOS Saw to Triangle Waveshaper (corrected URL)

[Scott Gravenhorst]

In the PWM section, there are resistors that have values
with a strike through.  I did this so that the original
values are still readable.  René Schmitz had spec'd a
power supply of 9 to 15 volts, bipolar.  Also, see René's
original drawing for the expo converter since my drawing
was changed, replacing the expo with a linear V-I converter.
With a balanced supply, I would try the strike through
values.

Also, René's circuit spec'd a 2.2nF integration cap.  I
substituted 4.4nF simply because I wanted a lower range
of operation for a given set of pitch CVs.

The V-I converter is not affected by moving from a balanced
bipolar supply to +8/-12, other than the resistors involved
with offset nulling the opamp.  However, I think most people
do not run linear here, so for most builders, the linear V-I
goes away in favor of René's expo.

The saw to tri converter should work with anything from +3
to +18 volts (given that voltage powers the whole circuit).


cstecker at umich.edu wrote:
>
>
>I notice the web page says values have been changed to deal with FatMan's 
>funky -8/+12v supply.   Which are correct for a plain old +/- 15v supply?
>
>-Chris
>
>
>> >> http://home1.gte.net/res0658s/TekLab_FatMan_WebSite/VCO_pwm_tri_suboctav
>> >>e.html
>> >>
>> >> is the internet link.
>> >>
>> >> Sorry for the confusion.
>> >
>> >Why are you not using the spare inverters from the 4069 in the blue
>> >shade part for the LFO in the pink shade part?
>> >
>> >I mean, if we want to be CMOS clean! ;O)
>> >
>> >Cheers,
>> >Magnus
>>
>> =========================================================
>> - Government: The other religion.
>> - The media's credibility should always be questioned.
>> - Lambs who lie down with lions are lunch.
>>
>> -- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
>> -- Linux Rex         | RedWebMail by RedStarWare
>> -- FatMan: home1.GTE.NET/res0658s/TekLab_FatMan_WebSite/index.html
>

=========================================================  
- Government: The other religion.
- The media's credibility should always be questioned.
- Lambs who lie down with lions are lunch.

-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
-- Linux Rex         | RedWebMail by RedStarWare
-- FatMan: home1.GTE.NET/res0658s/TekLab_FatMan_WebSite/index.html