Explore BrainMass

Explore BrainMass

    Fermi Energy and Circuits

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!


    Please could you provide detailed answers from the questions below;

    1. a silicon n-p-n bipolar junction (BJT) is designed with emitter, base and collector doping levels of 1019 cm-3 , 1015 cm-3 and 5 × 1017 cm-3 , respectively. Assuming the intrinsic carrier concentration (ni) in silicon to be 1010 cm-3 , calculate the Fermi energy, EF, relative to the intrinsic Fermi energy, EFi for each layer. Hence draw the energy band diagram for the BJT labelling the energy sale clearly to show the relative positions of EF and EFi across the structure.

    Explain; [a] the choice of doping levels for emitter, base and collector.

    [b] the biasing conditions required to turn the transistor on.

    © BrainMass Inc. brainmass.com October 9, 2019, 3:42 pm ad1c9bdddf


    Solution Summary

    This solution is comprised of a very detailed, step-by-step guide on how to approach and answer these electrical and computer engineering based questions. The provided solution contains the necessary equations for solving the questions and an explanation of what all the variables within the equations represent. In order to view the solution, a pdf file needs to be opened.