Hi guys. I am having a research on optical NoCs and one of its requirements is the scheduling of the packets and I was able to implement a scheduling algorithm in an FPGA. This time, I wanted to interface the FPGA to the optical NoC but the FPGA outputs digital voltage while the NoC needs analog voltage. And that the NoC needs a varying analog voltage because the microring in the NoC needs it for different tuning. Any idea on how to solve this?
Depending on the requirements of your device, you might also use the FPGA to generate a pulse width modulation (PWM) signal and then filter that to get your analog voltage. A DAC would be more accurate PWM is easier to implement.