torsdag 21. august 2014

VCA works as expected

I tested the dual VCA today. Except for a mixup of output pin 1 and 2, it works as expected. At 10V the amplification is just slightly higher than 1. The VCA is linear, so at 5V it looks roughly like 50% amplification

VCA hooked up to the bread board. The two 1k trim pots are for adjusting the symmetry around 0V. 

Response at CV=10V. The outermost triangle wave is the output, and it's slightly larger than the input.

Response at CV=5V, the output is about half the size of the input.

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