Question

Draw the typical input and output characteristics of an n-p-n transistor in CE configuration. Show how these characteristics can be used to determine (a) the input resistance (ri), and (b) current amplification factor (β).

Answer 1

The common emitter configuration, the emitter is the common in the terminal.

• The Input is between the base and the emitter
• The output is between the collector and the emitter.
• The output characteristics are controlled by the input characteristics.
• The collector current change by the input characteristics.
• The point to be noted that the base current and collector current are linear to each other.
• The current amplification factor is depending upon the Ic and I(b). and Vce is kept constant.
• I am attaching the picture of npn transistor.