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d logician
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i have no idea how transistors amplify ...how can the output gain be greater than the input gain ? ...efficiency is output/input which can never be greater than one, right?
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Transistors amplify electrical signals through a process called "transistor action." This is achieved by using the transistor's three layers of doped material, which create two PN junctions. By applying a small voltage to the base layer, the transistor allows a larger current to flow from the collector to the emitter, effectively amplifying the electrical signal.
Transistors are smaller, more efficient, and more reliable than vacuum tubes. They also require less power to operate and produce less heat. Additionally, transistors can be easily miniaturized, making them suitable for use in electronic devices such as computers and smartphones.
The two types of transistor amplifiers are bipolar junction transistors (BJTs) and field-effect transistors (FETs). BJTs use both electrons and holes as charge carriers, while FETs use only one type of carrier, either electrons or holes.
Transistors amplify both AC and DC signals by using a biasing voltage. This voltage is applied to the base terminal, and it determines the operating point of the transistor. The biasing voltage allows the transistor to amplify both positive and negative portions of the input signal, resulting in amplification of both AC and DC components.
No, transistors, like all electronic components, introduce some level of distortion to the amplified signal. This distortion is caused by non-linearities in the transistor's characteristics. However, with proper design and use of feedback, the distortion can be minimized to a negligible level.