The input characteristic diagram 2 (b) is the input characteristic curve of the transistor,
The input and output characteristics of a transistor
The cut-off frequencies f β and f α are 0.707 times the frequency when β drops to low frequencies
There are two types of transistor based on their materials:
Due to the thinness of the base region and the reverse bias of the collector junction
Figure 2 (b) shows the input characteristic curve of the transistor,
