Nihaludeen
Member level 2
I am trying to generate the SPWM using analog circuit, by comparing sine with triangular wave the output will be Sinusoidal PWM.
- Here i am generating Sine wave of 50 HZ using wein bridge oscillator. And it outputs good.
- Triangular wave is generated by square wave generator and integrator.
- Two waves are compared using comparator( LM393 )
Waveform generation circuits https://drive.google.com/open?id=1BFyOmhTnKfh69sRM6mcRJSJp97E919Gc
The two waves should be like the below images
But i get like this
How to shift the wave up or down according to the required amplitude ??
- Here i am generating Sine wave of 50 HZ using wein bridge oscillator. And it outputs good.
- Triangular wave is generated by square wave generator and integrator.
- Two waves are compared using comparator( LM393 )
Waveform generation circuits https://drive.google.com/open?id=1BFyOmhTnKfh69sRM6mcRJSJp97E919Gc
The two waves should be like the below images
But i get like this
How to shift the wave up or down according to the required amplitude ??