A Better Circuit to Boost the Voltage of a Pulse

Dick Cappel has a very nice circuit for boosting the voltage of a single pulse (or PWM signal). It costs an additional transistor compared to my previous post but it allows the boosted voltage to drop to zero (take the output from the collector and remove all of the components right of the base resistor except for the resistor from the collector to ground – as noted on the webpage). For driving a MOSFET you’ll want to play with the values a bit, especially with the resistor from the collector to ground.

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