DAC by PWM

Hello friends This post is about Digital to Analog Converter (DAC) made by Pulse Width Modulation (PWM).

As you filter out a PWM pulse you get DC output voltage and thus this process of filtering PWM pulses can be used as DAC (Digital to analog conversion).

DAC by PWM

As you can see in this figure Filtered PWM generates DC voltage with ripples.

To know much more about this technique have a look at this PDF, in this PDF file you will get all the technical details of generating DAC by PWM and all the calculations needed.
This PDF also describes you how to do DAC b PWM in TI DSP TMS320f280X series.

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