Physics > Semi-conductor Devices and Electronics > 11.0 Transistor
Semi-conductor Devices and Electronics
1.0 Introduction
1.1 Classification of solids on the basis of their conductivity
1.2 Band theory of solids
1.3 Classification of solids on the basis of band theory
2.0 Types of semiconductor
3.0 Mass action law
4.0 Electrical conductivity in semiconductor
5.0 $p-n$ junction
5.1 Depletion region
5.2 Forward biasing of a $p-n$ junction
5.3 Reverse biasing of a $p-n$ junction
6.0 Breakdown voltage
7.0 $I-V$ characteristics of a $p-n$ junction
8.0 Rectifier
8.1 Half wave rectifier
8.2 Full wave rectifier
8.3 Ripple frequency
8.4 Ripple factor
8.5 Ripple efficiency $\left( \eta \right)$
8.6 Form factor
9.0 Light emitting diode (LED)
10.0 Zener diode
11.0 Transistor
12.0 Boolean identities
13.0 Logic gates
14.0 De Morgan's theorem
11.1 Operations of a transistor
1.2 Band theory of solids
1.3 Classification of solids on the basis of band theory
5.2 Forward biasing of a $p-n$ junction
5.3 Reverse biasing of a $p-n$ junction
8.2 Full wave rectifier
8.3 Ripple frequency
8.4 Ripple factor
8.5 Ripple efficiency $\left( \eta \right)$
8.6 Form factor
A transistor can be operated in any one of the following three configurations:
- Common base $(CB)$
- Common emitter $(CE)$
- Common collector $(CC)$
The operation of $n-p-n$ & $p-n-p$ type transistor with different configuration is shown in the table below.
| Configurations | $n-p-n$ type transistor | $p-n-p$ type transistor |
| Common base $(CB)$ |
|
|
| Common emitter $(CE)$ |
|
|
| Common collector $(CC)$ |
|
|
The relation between the emitter, base and collector current is given by, $${I_B} = {I_E} - {I_C}$$
Input characteristics of a transistor
The variation of the input current with the input voltage for a given output voltage is known as input characteristics of a transistor.
Output characteristics of a transistor
The variation of the output current with the output voltage for a given input current is known as output characteristics of a transistor.
