Octave synthesis on a PIC microcontroller
dave.halliday at greymatter.com
Sun Jun 22 09:29:36 CEST 1997
>>congratulations..... but what i would really like to see is a PIC based
>>exponential convertor so we can just make linear osccillators and voltage to
>>and forget ovens & matched transistors.... just the one exponential
>>convertor with a couple of hex sample& hold chips & thats the nastiest
>>partof a synth gone.....
> Yes! I've been pondering this solution for over a year now (haven't
> had the time to do more, alas). Seems like such an obvious way to
> tackle the problem, I've been trying to figure out what the downsides
> that I haven't thought of could be.
Problem there is that many of the PIC chips use slow A/D/A - they use
a cheaper integration method of conversion than the more expensive
sucessive approximation or the really $$$ flash conversion.
Don't know if you could get the accuracy plus enpough speed for
You *could* just use one oven and matched transistor with the sample
and holds - I am just wondering what the parts count would be...
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