1. Q1 is turned on when the output of the gates G3(G4) is low. G3 & G4 have been wired in parallel to deliver more current to the base of Q1. It is also possible to put transistors in parallel to handle more current. Driving each base with an independent gate output through a base resistor and having common emitter/ collector terminals. The primary(L1) is assumed to be made of sufficiently thick copper wire so that it can handle heavy currents from 10's of mAs to 100's of mAs with negligible resistive voltage drop across it. This also ensures a linear increase in current in the primary which results in a constant