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Pwm controller 2010-01-05

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Dr.EM

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Dr.EM submitted a new article:

PWM controller - This is a PWM controller design that I have built and which works. As shown, it should function tha

This is a PWM controller design that I have built and which works. As shown, it should function that an increasing voltage applied to the comparator gives an increasing duty cycle at the output, this is variable fully from 0-100%. Swap the inputs on the comparator to give negative correlation if this is desired.

The design uses op-amps to generate a triangle wave which can run at either 120hz or 3khz, this is fed into a comparator input and the reference voltage sets the pulse width. The...
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