Transfer characteristics [output voltage (V0) vs input voltage (Vi)] for a base biased transistor in CE configuration is as shown in the figure. For using transistor as a switch, it is used:
In region III
Both in region (I) and (III)
In region II
In region I
As we learned in
Transistor -
Three layered semiconducting device .
NPN or PNP
- wherein
1. Emitter is heavily doped
2. collector is moderately doped .
3. Base is lightly doped & very thin
For using transistor as a switch it is used in cut off state and saturation state only.