transistors, mofets, thyristors and comparators

Transistors. Logic gates output tiny mille amps currents – too small for most devices (except L.E.Ds). A current of a few mille amps from a logic circuit is boosted by a transistor to a few hundred mille amps. Equation is current gain equals collector current divided by the base current. If the voltage input is less than point seven, the transistor is off, if it is greater than point seven, the transistor is on. Mosfets. An n-channel MOSFET can switch much bigger currents than transistors (even hundreds of Amps!) When the gate source…