Hi
The circuit works well with the high pass filter.
However, if I do not use them, it did not work.
I tested with 8 ohm small speaker.
The square wave also consists of sinus wave with variety of frequency.
The cut frequency will only allow some specific frequency (fc = 1.5kHz) flowing.
Is it true, that if my PWM frequency is 44100Hz, the analog waveform sin would also become in 44100Hz ? (which is the construction of sinusoid wave which is allowed by filter to flow)
They only change the attenuation ?
Thanks2 very much for your explanation.
Best regards
---------- Post added at 17:17 ---------- Previous post was at 17:15 ----------
Hi Alex,
This is the schematic
Thanks