The VCO is a 6 HP module that has a CEM3340 based design. The first input is the linear FM input. The gold input is the 1V/oct (which can be controlled with the golden knob). The third input is the soft sync. The purple input is the PWM modulation, which can be attenuated with the bottom knob and separately controlled with the middle knob. From top to bottom the outputs are the sawtooth wave, the pulse wave and the triangle wave. The sawtooth wave is at 10Vpp the other waves are louder and softer (they are buffered, but not amplified copies from the original CEM3340 output).
The design of this is a mix. It uses the basic and advanced schematics from Look Mum No Computer, the variety of schematics on the electric druid site, and the schematic from Non-Linear-Circuits.
As you can see, there is only one input (which may have been a mistake) there is no high frequency tracking. When in doubt, the design choses the simplest solution, however, the FM input and sync input were kept.
Geen opmerkingen:
Een reactie posten