Junction Transistor
Chapter Name : Semiconductor Electronics: Materials, Devices And Simple Circuits |
Sub Topic Code : 101_12_14_09_07 |
Topic Name : Junction Transistor |
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Sub Topic Name : Current Amplification Factor |
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Introduction
Current Amplification Factor or Current Gain is basically the ratio of the ratio of the output current to the input current when it’s passing through an electrical device.
Pre-Requisites:
Current Amplification
Activity:
Silicon (Si) is the most widely used material in semiconductor devices.
Real Life Question:
What is Current Amplification Factor?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Static Current Amplification | Because a small change in I B results in a large I C variation when the bias is right, a transistor can operate as a current amplifier. |
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 maximum obtainable current amplification factor of a bipolar transistor is known as the beta of the transistor. Depending on the way in which a transistor is manufactured, the beta can range from a factor of a few times up to hundreds of times.
What you learn in Practice:
Ratio is more than one Ic/Ib = current amplification factor This extra amplitude comes from the biasing batteries used.