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Don’t Fear The Filter: Lowpass Edition - Hackaday
https://hackaday.com/2017/03/08/dont-fear-the-filter-lowpass-edition/
Here, we’re aiming at an audio PWM, so ideally we’d set the cutoff of the filter around 20 kHz, at the top of human hearing. ... One thing I …
demodulation - pwm audio signal with low pass filter ...
https://electronics.stackexchange.com/questions/323735/pwm-audio-signal-with-low-pass-filter
The PWM was created using a triangular waveform produced by XFG1 function generator and a sine wave (which represents my audio signal) produced by XFG2 function generator. The sine wave is at 3kHz and the triangular wave is at 300kHz. I choose a cut-off frequency for my LPF to be at 20kHz. The problem I have is that the output frequency should …
Beginner Concepts: Using A Low-pass Filter To Smooth …
https://hackaday.com/2011/06/16/beginner-concepts-using-a-low-pass-filter-to-smooth-pwm-output/
This is the method most commonly used to dim an LED. But generating a smooth voltage in this way takes just a few more parts. [Scott Daniels] spent some time discussing the process of smoothing a...
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