Question

why biasing is required in transistor??

Answer 1

The process of obtaining a certain DC collector current at a certain DC collector voltage by setting up the operating point is called biasing. After establishing the operating point, when an input signal is applied, the output signal should not move the transistoreither to saturation or to cut-off.

Bias is direct current ( DC ) deliberately made to flow, or DC voltage deliberately applied, between two points for the purpose of controlling a circuit . In a bipolar transistor , the bias is usually specified as the direction in which DC from a battery or power supply flows between the emitter and the base.