You’re going to build two simple transistor circuits, each using a single transistor. These circuits will allow you to observe the operation of a transistor as an amplifier, just as Walter ...

implementing as it does a complete simple op-amp with five transistors. Looking at the circuit diagram it follows the classic op-amp with a long-tailed pair of NPN transistors driving a PNP gain ...

There is another family of transistors which have analogous ... to the gate voltage. We have an amplifier. A simple FET radio receiver circuit showing FET biasing. The gate is biased at ground ...