Wednesday, 8 October 2014

Make a constant current source using transistors And Making of current mirror circuits,


Make a constant current source using transistors

         And

Making of current mirror circuits,
Introduction- you may be thinking, why I have to know making constant current source, and current mirror, answer is that actually what happens in many cases of powering a project we need a constant current source, so this project is very useful,

Components required- some matched n-p-n transistor, one reference resistance, and a primary voltage source,

Working principle of constant current, current mirror circuit in simple points-

1. take two matched transistor T 1 and T 2

2. connect together all of their emitter and base

3. so all have same base-emitter voltage.

4. so simply they produce same collector current

Circuit diagram-





 So in our upcoming project i show you the application of constant current source in circuit,


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