A simple AM transistor radio can be made with surprisingly few components, but for a circuit with a reasonable performance they suggest six transistors to be the optimal number. If we think about ...

Before the MP3 was the Walkman and before that was the "tranny" - the transistor radio. Personal radios existed before their mass popularity in the 1960's, but then they became a teenage 'must-have'.

The mosfet is off if the input voltage is normally less than \(2.0 V\). By looking at a circuit diagram of a transistor switching circuit, you should be able to say what the circuit is used for ...