Sinus PWM (sigma-delta) generation questions

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Black Jack

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pwm sinus

How make sinus PWM without separate sinus generator
and separate PWM modulator?
 

sinus pwm

If you want to make sinus PWM, you can use Direct Digital Synthesis (DDS) technology. You can do it using a microcontroller and software, or hardware.
 

dds pwm

Look "Electronics-Lab". Circuit Cellar #131, June 2001. The autor uses DDS with an 8051, and two PWM outputs to generate: sinus, triangle, sawtooth and square waveforms.

Regards, svicent
 

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