Name: Transistor Parameters
Uploaded: 2019-07-19
Duration: 11 min 25 s
Description: This video explains how to calculate the parameters of transistors such as current gain, voltage gain and power gain in CE configuration. View this to learn more.

Question

Draw a labelled circuit diagram of common emitter amplifier. Explain the recombination of holes and electrons at junctions and write phase relationship between input and output voltages.

Accepted Answer

The following figure depicts the circuit for a p-n-p transistor. In this circuit, the emitter is common to both the input (emitter-base) and output (collector-emitter) circuits and is grounded. The emitter-base circuit is forward biased and the base-collector circuit is reverse biased.

Electron- hole recombination:

When an electron falls from the conduction band into the valence band, into a hole, a recombination process occurs and an electron hole pair disappears. The energy of recombination will be emerged as a photon of light.

Draw a labelled circuit diagram of common emitter amplifier. Explain the recombination of holes and electrons at junctions and write phase relationship between input and output voltages.

Important Questions on Junction Transistors

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