An active device refers to any electronic component or device that is powered to produce a signal or amplify a signal. Common examples of active devices include transistors, diodes, and integrated circuits. While the term active device is specific, there are several synonyms that can be used interchangeably. These synonyms include amplifying device, active component, signal device, and powered component. Each of these alternatives accurately describes a device that requires a source of power in order to function and produce an output signal. The use of synonyms is helpful when communicating technical information in various contexts, such as engineering, electronics, and telecommunications.