desertkids
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how can i convert the PWM pulse width to proportional voltage output??the article is write like this,please help see wat should i do...
"If you apply the two square waves to an exclusive OR function, you will get a PWM output where the displacement angle determines the waveform output. For power factor measurement, we are interested in the angles between 0 degrees and 90 degrees. At 0 degrees, the two wave forms are in phase, and so the PWM output is 0% ON. At 90 degrees, there is a 50% overlap, so the PWM output has a 50% output. This waveform can then be filtered to give an output voltage proportional to the displacement angle from 0 degrees to 90 degrees."
i have find a ic that can do this job,AD8302 RF gain and phase detector..but i cant buy it from malaysia market..any similar ic suggestion or other analog circuit??thanks...
"If you apply the two square waves to an exclusive OR function, you will get a PWM output where the displacement angle determines the waveform output. For power factor measurement, we are interested in the angles between 0 degrees and 90 degrees. At 0 degrees, the two wave forms are in phase, and so the PWM output is 0% ON. At 90 degrees, there is a 50% overlap, so the PWM output has a 50% output. This waveform can then be filtered to give an output voltage proportional to the displacement angle from 0 degrees to 90 degrees."
i have find a ic that can do this job,AD8302 RF gain and phase detector..but i cant buy it from malaysia market..any similar ic suggestion or other analog circuit??thanks...