Question

What is early effect? Explain the effect of early effect on transistor characteristics.

Answer 1

Base-narrowing has two consequences that affect the current: There is a lesser chance for recombination within the "smaller" base region. The charge gradient is increased across the base, and consequently, the current of minority carriers injected across the emitter junction increases. ·
Early effect is very important phenomenon used in drawing input characterstics( graphical relation between input current and input voltage for different values of output voltage) of Common Base Configuration which is similar to characterstics of forward biased diode. Early effect is also known as Base Width Modulation. ·