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Why is there a flatband voltage in the calculation of Threshold voltage?

by xhwubai
Tags: calculation, flatband, threshold, voltage
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xhwubai
#1
May20-09, 08:10 AM
P: 10
1. The problem statement, all variables and given/known data

The threshold voltage equals the sum of the flatband voltage, twice the bulk potential and the voltage across the oxide due to the depletion layer charge.

My confusion: from the energy band diagram, flatband voltage is redundant
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