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Design >> Analog Design >> unipolar and bipolar PWM
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Message started by mustakhim on May 2^nd, 2010, 12:17am

Title: unipolar and bipolar PWM
Post by mustakhim on May 2^nd, 2010, 12:17am

i'm not sure if this is the right topic to enter here, but i just give it a try.

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

Title: Re: unipolar and bipolar PWM
Post by love_analog on May 2^nd, 2010, 7:38am

bipolar is where Vout(diff) can be +Vdd or -Vdd. No in between point

Unipolar is where Vout is Vdd or zero. One leg is Vdd or zero and the other is -Vdd or zero. Hence Vout(diff) is still swinging between +Vdd and -Vdd. just like bipolar case.