For an n-p-n transistor in the common emitter configuration, draw a labelled circuit diagram of an arrangement for measuring the collector current as a function of collector emitter voltage for at least two different values of base current. Draw the shape of the curves obtained. Define the terms:
(i) ‘output resistance’ and (ii) ‘current amplification factor’ .

Circuit diagram for drawing characteristics of a common emitter n-p-n transistor is given as follows:

The output characteristics are drawn by plotting current I_C versus collector emitter voltages V_CE, keeping the base current I_b constant.
Circuit diagram for drawing characteristics of a common emitter n-p-n

Output resistance: It is defined as the ratio of the collector emitter voltage (ΔV_CE) to the corresponding change in collector current (ΔI_C) at constant base current l_b

straight R subscript 0 space equals space open parentheses fraction numerator increment straight V subscript CE over denominator increment straight I subscript straight c end fraction close parentheses straight I subscript straight b space equals space constant

Current amplification factor: It is defined as the ratio of the change in collector current to the change in base current.

straight beta space equals space open parentheses fraction numerator increment straight I subscript CE over denominator increment straight I subscript straight b end fraction close parentheses subscript straight V subscript CB space equals space constant end subscript end subscript

529 Views

Semiconductor Electronics: Materials, Devices and Simple Circuits

Hope you found this question and answer to be good. Find many more questions on Semiconductor Electronics: Materials, Devices and Simple Circuits with answers for your assignments and practice.

Physics Part II

Browse through more topics from Physics Part II for questions and snapshot.