And a Quarter Gets You Coffee

The major issue with using Dick Cappel’s voltage boost circuit to drive a MOSFET is that a resistor would be used to pull down the gate voltage. This issue can be addressed by adding another transistor to actively pull down the voltage at the appropriate time. An additional transistor (an NPN) can be used very […]

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 […]