Junction Transistor
Chapter Name : Semiconductor Electronics: Materials, Devices And Simple Circuits |
Sub Topic Code : 101_12_14_09_02 |
Topic Name : Junction Transistor |
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Sub Topic Name : Transistor: Structure And Action |
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Introduction
A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power.
Pre-Requisites:
Transistor
Activity:
Silicon (Si) is the most widely used material in semiconductor devices.
Real Life Question:
What are Junction transistors?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Transistor | A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| microprocessors | All transistor types can be used as the building blocks of logic gates, which are fundamental in the design of digital circuits. Transistors act as on-off switches; in the MOSFET, for instance, the voltage applied to the gate determines whether the switch is on or off. |
Real life uses :
Building circuits.
Places to visit :
Digital circuits.
Practical examples around us
| Examples | Explainations |
|---|---|
| Solar Cell | Solar cells are typically illuminated with sunlight and are intended to convert the solar energy into electrical energy. |
What you learn in Theory:
The essential usefulness of a transistor comes from its ability to use a small signal applied between one pair of its terminals to control a much larger signal at another pair of terminals.
What you learn in Practice:
The transistor provides current gain, allowing a relatively large current in the collector to be switched by a much smaller current into the base terminal.