Method and circuit for emulating a trumpet contact breaker

摘要

A method and circuit for emulating a contact breaker in trumpets having an inductor coil powered from a battery through a power driver device. The method includes obtaining the derivative of the current value flowing through the inductor of the trumpet coil, sensing a change in the slope of this derivative, and turning off a circuit portion of the driver device upon a negative slope being sensed. The circuit portion is turned back on with a transient of predetermined duration.