It controls voltage or current flowing through it. It is similar to two diodes joined back to back. Depending on the type of transistor it is used for different applications. A transistor is an electronic component that is used in circuits to either amplify or switch electrical signals or power, allowing it to be used in a wide array of electronic devices. Note: A transistor is a fundamental unit of all the electronics used in our daily life. Frequently Asked Questions FAQs What is Bipolar Junction Transistor A bipolar junction transistor is a single silicon component where electrons and holes are used as charge carriers. Field Effect Transistor (FET): These are voltage controlled devices. Bipolar Junction transistors (BJT): Provides high output current for small input current.Ĭ). Rahul Awati What is a transistor A transistor is a miniature semiconductor that regulates or controls current or voltage flow in addition amplifying and generating these electrical signals and acting as a switch/gate for them. It can be used to make electrical signals stronger, therefore called an amplifier. Phototransistors: Transistors in which current flow depends on the amount of light incident on it.ī). What is a Transistor A transistor is a 3-pin tiny electronic device. A transistor is a semiconductor device, usually made out of silicon or germanium, used to amplify or attenuate the strength of the electric current in electronic circuits. Transistors are used for amplification purposes.ĭifferent types of transistors are available in the market.Ī). Transistors are used as electronic switches. Out of three terminals one terminal of the transistor is always common to input and output. A transistor is generally made up of Silicon or germanium. If N-type semiconductor material is sandwiched between two P-type semiconductor materials then it is called a PNP type transistor. If P-type semiconductor material is sandwiched between two N-type semiconductor materials then it is called NPN type transistor. It is a three layer semiconductor device where a P-type (or N-type) semiconductor material is sandwiched between two N-type (or P-type) semiconductor materials. A transistor stands for ‘transfer (=trans) of resistor (=istor)’.
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