Henrik, I like your idea if can be handled by hardware as I am afraid of software that may hang. Also it gets complicated when you want to control the output as bipolar and have to switch all transistors both at PWM and low freq. signal.
Do not know if or how NCO can be steered PWM/CWG module.
Richard, also nice idea about CLC module. I suppose the low freq signal is external of the PIC. Or may be the NCO signal too.
Ioannis
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