It used to be a rite of passage to be able to do the math necessary to design various bipolar transistor amplifier ...

Why would a wall-wart design have an external FET driving an external high-voltage transistor? A decade ago, Paul Rako picked the brains of some of the top people in the industry to find answers. When ...

Two of the most often used amplifier building blocks in audio amplifier design are the common emitter amplifier with emitter degeneration and the emitter follower using the same circuit biasing. The ...

PartSim is used in this example to simulate the Common Emitter Amplifier. The base bias voltage is set with the voltage divider arrangement. The input signal is amplified by the 2N2222 NPN transistor.