vco

[chnowak at web.de]

hi folks,

i'm in the process of designing and implementing my first synth diy 
project and have just finished the design of a first very simple vco. 
i would be very happy if some of you experts would have a look at it 
and tell me if this design is ok. i haven't yet calculated proper 
values for the resistors and the capacitor, though.

you can find it at:
http://www.crosswinds.net/~chnowak/chnvco_rev_a.gif

i also have a little problem with the exponential converter. for 
voltages between -15v and 0v, i'd say it is indeed exponential, but 
between 0v and +15v rather not. it would be very nice if someone 
would have a look at it and tell me if this curve looks normal to him:

http://www.crosswinds.net/~chnowak/cursrc.gif


anyway, thank you very much in advance for your comments and 
suggestions !

/chris