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Chapter 18: Problem 45

What are the two functions that a transistor may perform in an electronic circuit?

Short Answer

Expert verified
Answer: A transistor can function as an amplifier and a switch in an electronic circuit. As an amplifier, it increases the strength (amplitude) of an input signal, while as a switch, it controls the flow of electrical current between two terminals based on the input signal applied at the third terminal.

Step by step solution

01

Function 1: Amplifier

A transistor can function as an amplifier in an electronic circuit. This means it can increase the strength (amplitude) of an input signal, such as voltage or current. In this role, a small change in the input signal can produce a much larger change in the output signal, making the output signal more powerful than the input signal.
02

Function 2: Switch

A transistor can act as an electronic switch in a circuit. In this function, it can control the flow of electrical current between two terminals, based on the input signal applied at the third terminal. When the input signal reaches a specific threshold, the transistor switches from an "off" state (no current flow between the two terminals) to an "on" state (a current flow between the terminals) or vice versa. This ability to transition between the on and off states allows the transistor to be used in various digital applications, including logic gates and microprocessors.

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