ASM VCO

[gstopp at fibermux.com]

     In theory yes, the frequency range will be shifted up, however there 
     may be some other components that need a little tweaking to keep the 
     sawtooth reset time fast so that the tracking curve stays accurate. It 
     would be important to use a fast FET in this application. Sawtooth 
     waveshape can be compromised if the VCO is to be used as a clock 
     source for digital logic.
     
     Since I haven't tried this yet (I haven't been able to do any testing 
     lately), I don't have specific answers, and experimentation would be 
     essential before giving advice. However I think that 150Khz should be 
     attainable.
     
     - Gene
     gatopp at fibermux.com


______________________________ Reply Separator _________________________________
Subject: ASM VCO
Author:  Paul.Maddox at bew.co.uk at ccrelayout
Date:    6/26/96 7:27 AM


Dear all,
     
   I have a question.. If I change the integrating
cap in the ASM VCO from 2.2nF to .22nF will the 
frequency output be multiplied by 10?? 
   Theoretically it should but will the OA's cope
with a frequency range going up to 150K?? I know 
it sounds daft but I do have my reasons, Im trying 
to make some kind of wave table VCO. Or is there 
an easier way?.
     
 Yours,
     
 Paul Maddox