PWM Bit Bang to Mimic Sine Pulse Train

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02:21:14

This sim is showing a bit bang approach to creating a sine wave by filtering a pulse train with an RC filter. 

Red is an ideal sinusoidal wave.

Green is a filtered pulse train from a classical method for generating a PWM signal using a sine wave & high frequency triangle wave as inputs for a comparator.

Blue is a filtered pulse train from manually set pulse trains to simulate a microcontroller’s bit bang output. This should also be possible by frequently micromanaging a PWM signal on (nearly) every counter overflow to update the pulse width.

published 3 years ago

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