/diy/ - Do It Yourself

Anonymous Wed Dec 30 15:32:38 2020 No.1990042 [View]
File: 31 KB, 575x335, OTA_VCA_updated.png [View same] [iqdb] [saucenao] [google]

So I updated my OTA VCA and powered it with a dual supply. I tied the negative feedback resistor from the output to the ground instead of the inverting input and added a resistor in series with the potentiometer on the I(bias) pin. I also switched the signal input from a DC square wave to an AC triangle wave produced by my oscillator. Still not getting an output though. I'm getting more LM13700s mailed to me so I'll be able to see if it's an IC problem (e.g. sunk too much current into I(bias)) or a design problem.

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/diy/ - Do It Yourself

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