![]() The first commercial applications for transistors were for hearing aids and “pocket” radios during the 1950s. A voltage source such as a battery drives the current, while the rate of current flow through the transistor at any given moment is governed by an input signal at the gate-much as a faucet valve is used to regulate the flow of water through a garden hose. An electrical signal applied to the base (or gate) influences the semiconductor material’s ability to conduct electrical current, which flows between the emitter (or source) and collector (or drain) in most applications. There are typically three electrical leads in a transistor, called the emitter, the collector, and the base-or, in modern switching applications, the source, the drain, and the gate. Deeply embedded in almost everything electronic, transistors have become the nerve cells of the Information Age. Transistors are the active components of integrated circuits, or “microchips,” which often contain billions of these minuscule devices etched into their shiny surfaces. Transistor, semiconductor device for amplifying, controlling, and generating electrical signals. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! ![]() ![]()
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