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High Voltage PWM

I really hope someone can help me with this difficult issue: I want to generate a PWM signal from a 170V DC input. ok, so far I have an arduino that can generate a PWM signal and drive a MOSFET that ...
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How to get uni polar sinusoidal wave from buck converter?

I am trying to build a pure sine wave inverter by using a buck converter cascaded with a square inverter. My hope is that I can vary the duty cycle in such a fashion so as to reach a fully rectified ...