This is the first book of Giorgos Lazaridis covering the BJT Transistor Theory. The purpose of this book it to help the readers understand how transistors works and how to design a simple transistor circuit. It is addressed to amateur circuit designer with little or no previous knowledge on semiconductors. The book is written to be easy to follow, so it keeps mathematical formulas as simple as possible. Feel free to download and read it. More topics will be covered later.
The BJT Transistor Theory – [PDF]