But from there he moves on to the juicy bits. He builds a transistor-based constant current driver, then adds voltage regulation for the circuit as seen in the schematic on the left. He moves on ...

Here’s a simple FET circuit that lets you switch power ... Unlike with BJT transistors that need a constant current flow, you only need to charge a gate once for the FET to remain open for ...

Many people giving talks had complained about the current germanium transistors ... outcome of being part of an electrical circuit -- the transistor would have too many free electrons.