Junction Transistor
Chapter Name : Semiconductor Electronics: Materials, Devices And Simple Circuits |
Sub Topic Code : 101_12_14_09_08 |
Topic Name : Junction Transistor |
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Sub Topic Name : Basic Transistor Circuit Configurations And Transistor Characteristics-Common Collector |
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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 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 common-collector circuit is a basic transistor amplifier with current gain. It has high input impedance and low output impedance. The voltage gain is slightly lower than one. The common-collector circuit is suited as a driver stage for connecting with a low impedance load. This application is called an impedance converter.
What you learn in Practice:
The common-emitter is the most popular of the three transistor configurations because it has the best combination of current and voltage gain.