Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition
7th Edition
ISBN: 9780199339136
Author: Adel S. Sedra, Kenneth C. Smith
Publisher: Oxford University Press
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Chapter 5, Problem 5.21P
To determine
Apparent value of threshold voltage
The value of W/L ratio.
The value of current flowing when
The value of
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Given the following data for the intrinsic semiconductor of InP:
Eg = 1.3 eV, me = 0.07m, mh = 0.69m, He = 4600 cm²/V-s, μh = 150 cm²/V-s; T = 300 K.
Two samples of the InP is now doped as follows:
Sample A: doped n-type with No = 10¹⁰ cm-³
Sample B: doped p-type with NA = 5 x 10⁰ cm-³
(a)
Calculate the effective density of states in the valence and conduction bands and the
intrinsic charge carrier concentration for undoped/pure InP.
Calculate the majority and minority charge carrier concentrations for (i) sample A and (ii)
sample B.
Calculate and illustrate where the Fermi-level is located in the energy band for (i) sample
A and (ii) sample B.
(b)
(c)
(d)
(e)
(f)
Calculate the total conductivity for (i) sample A and (ii) sample B.
Now bring samples A and B together to form a pn-junction. Sketch the band diagram of
the resultant pn-junction, indicating all the energy levels.
Calculate the build-in voltage of the pn-junction.
At room temperature a current of 1.66 mA flows through a pn junction at a forward bias
voltage of 0.15 V. What will be the current through the pn junction under reverse bias? (Use
VT = 26 mV).
If the DC bias voltage, Vd, across a reverse biased PN step
junction is equal to -2.5V then what is the capacitance of
this junction in femto Farads? Assume that Cj0 for the
junction is equal to 41.1 fF. (Note that 1 fF = 1 femto
Farad = 1 x 10^-15 F.) Also assume that the built-in
voltage for this junction is equal to 821mV.
Answer:
Chapter 5 Solutions
Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition
Ch. 5.1 - Prob. 5.1ECh. 5.1 - Prob. 5.2ECh. 5.1 - Prob. D5.3ECh. 5.2 - Prob. 5.4ECh. 5.2 - Prob. 5.5ECh. 5.2 - Prob. 5.6ECh. 5.2 - Prob. 5.7ECh. 5.3 - Prob. D5.8ECh. 5.3 - Prob. D5.9ECh. 5.3 - Prob. D5.10E
Ch. 5.3 - Prob. 5.11ECh. 5.3 - Prob. 5.12ECh. 5.3 - Prob. D5.13ECh. 5.3 - Prob. D5.14ECh. 5.3 - Prob. 5.15ECh. 5.4 - Prob. 5.16ECh. 5.4 - Prob. 5.17ECh. 5 - Prob. 5.1PCh. 5 - Prob. 5.2PCh. 5 - Prob. 5.3PCh. 5 - Prob. 5.4PCh. 5 - Prob. D5.5PCh. 5 - Prob. 5.6PCh. 5 - Prob. D5.7PCh. 5 - Prob. 5.8PCh. 5 - Prob. 5.9PCh. 5 - Prob. 5.10PCh. 5 - Prob. 5.11PCh. 5 - Prob. 5.12PCh. 5 - Prob. 5.13PCh. 5 - Prob. 5.14PCh. 5 - Prob. 5.15PCh. 5 - Prob. 5.16PCh. 5 - Prob. 5.17PCh. 5 - Prob. 5.18PCh. 5 - Prob. 5.19PCh. 5 - Prob. D5.20PCh. 5 - Prob. 5.21PCh. 5 - Prob. 5.22PCh. 5 - Prob. 5.23PCh. 5 - Prob. 5.24PCh. 5 - Prob. 5.25PCh. 5 - Prob. 5.26PCh. 5 - Prob. 5.27PCh. 5 - Prob. 5.28PCh. 5 - Prob. 5.29PCh. 5 - Prob. 5.30PCh. 5 - Prob. 5.31PCh. 5 - Prob. D5.32PCh. 5 - Prob. D5.33PCh. 5 - Prob. 5.34PCh. 5 - Prob. 5.35PCh. 5 - Prob. D5.36PCh. 5 - Prob. 5.37PCh. 5 - Prob. 5.38PCh. 5 - Prob. 5.39PCh. 5 - Prob. 5.40PCh. 5 - Prob. 5.41PCh. 5 - Prob. 5.42PCh. 5 - Prob. 5.43PCh. 5 - Prob. D5.44PCh. 5 - Prob. 5.45PCh. 5 - Prob. D5.46PCh. 5 - Prob. 5.47PCh. 5 - Prob. D5.48PCh. 5 - Prob. D5.49PCh. 5 - Prob. D5.50PCh. 5 - Prob. D5.51PCh. 5 - Prob. 5.52PCh. 5 - Prob. D5.53PCh. 5 - Prob. 5.54PCh. 5 - Prob. 5.55PCh. 5 - Prob. 5.56PCh. 5 - Prob. 5.57PCh. 5 - Prob. 5.58PCh. 5 - Prob. 5.59PCh. 5 - Prob. 5.60PCh. 5 - Prob. 5.61PCh. 5 - Prob. 5.62PCh. 5 - Prob. 5.63PCh. 5 - Prob. 5.64PCh. 5 - Prob. 5.65PCh. 5 - Prob. 5.66PCh. 5 - Prob. 5.67P
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