unipolar and bipolar PWM

[mmnr00]

hye guys,

Can anyone explain to me what is bipolar and unipolar PWM? I had search trough the net and couldn't find anything.

Thanks in advance for any help.

Mus

 

[FvM]

I had search trough the net and couldn't find anything

Don't know why, but I found an instructive explanation at once...
**broken link removed**

 

[mmnr00]

thanks for the website, maybe i also found the link when i google, but i didnt click at it cause i think it might not be the definition of PWM