PWM with Passive LPF

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04:53:17

A 1 kHz PWM source is lowpass filtered to give a DC voltage proportional to the duty cycle. A fast RC time constant (relative to the pulse repetition frequency) allows it to respond quickly to changes in duty cycle but results in lots of ripple. On the other hand, a slow RC time constant has less ripple but takes longer to respond to changes in duty cycle.

published 1 year ago

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