Electrical Engineering (EE) Exam > Electrical Engineering (EE) Videos > Analog and Digital Electronics > Introduction to Bipolar Junction Transistors
Introduction to Bipolar Junction Transistors Video Lecture | Analog and Digital Electronics - Electrical Engineering (EE)
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FAQs on Introduction to Bipolar Junction Transistors Video Lecture - Analog and Digital Electronics - Electrical Engineering (EE)
| 1. What is a bipolar junction transistor? |  |
Ans. A bipolar junction transistor (BJT) is a three-layer semiconductor device that can amplify or switch electronic signals and electrical power. It consists of a layer of p-type semiconductor sandwiched between two n-type semiconductors or vice versa.
| 2. How does a bipolar junction transistor work? | |
Ans. A bipolar junction transistor works by controlling the flow of current through the transistor using a small input current or voltage. It operates in two modes: the active mode and the saturation mode. In the active mode, the transistor amplifies the input signal, while in the saturation mode, it acts as a closed switch.
| 3. What are the three regions of a bipolar junction transistor? | |
Ans. The three regions of a bipolar junction transistor are the emitter, base, and collector. The emitter is heavily doped to provide majority carriers, either electrons or holes. The base is lightly doped and controls the flow of carriers. The collector is moderately doped and collects the majority carriers from the base.
| 4. What are the different types of bipolar junction transistors? | |
Ans. There are two main types of bipolar junction transistors: NPN (negative-positive-negative) and PNP (positive-negative-positive). The NPN transistor has two n-type semiconductors sandwiching a p-type semiconductor, while the PNP transistor has two p-type semiconductors sandwiching an n-type semiconductor.
| 5. What are the applications of bipolar junction transistors? | |
Ans. Bipolar junction transistors have various applications in electronics. They are commonly used in amplifiers, oscillators, logic gates, digital circuits, and power control devices. They are also used in audio systems, radio frequency circuits, and telecommunications equipment.
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