Junction Transistor
Chapter Name : Semiconductor Electronics: Materials, Devices And Simple Circuits |
Sub Topic Code : 101_12_14_09_11 |
Topic Name : Junction Transistor |
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Sub Topic Name : Transistor As An Amplifier (Ce-Configuration) |
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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:
In the Bipolar Transistor the most common circuit configuration for an NPN transistor is that of the Common Emitter Amplifier circuit and that a family of curves known commonly as the Output Characteristic Curves, relate the transistors Collector current ( Ic ), to the output or Collector voltage ( Vce ), for different values of Base current ( Ib ).
What you learn in Practice:
The base terminal of the transistor serves as the input, the collector is the output, and the emitter is common to both (for example, it may be tied to ground reference or a power supply rail), hence its name.