Junction Transistor
Chapter Name : Semiconductor Electronics: Materials, Devices And Simple Circuits |
Sub Topic Code : 101_12_14_09_05 |
Topic Name : Junction Transistor |
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Sub Topic Name : Input Resistance |
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Introduction
The electrical resistance of an electrical conductor is the opposition to the passage of an electric current through that conductor; the inverse quantity is electrical conductance, the ease at which an electric current passes.
Pre-Requisites:
Resistance
Activity:
Silicon (Si) is the most widely used material in semiconductor devices.
Real Life Question:
What are Resistors?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Resistors | Resistors are made of a wide variety of materials depending on factors such as the desired resistance, amount of energy that it needs to dissipate, precision, and costs. |
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 input impedance is the Thévenin's equivalent circuit of the electrical network, modeled by an RL (resistor-inductor) or an RC (resistor-capacitor) combination, with equivalent values that would result in the same response as that of the network.
What you learn in Practice:
The input resistance is defined as the ratio of the input voltage to the input current.