5. (a) What are the two major carrier transport mechanisms in a semiconductor? What is the mechanism in a diode? What is that in a BJT? And what is that in a MOSFET? (b) When using transistors (BJT or MOS) as current sources, why does the output current increase with the voltage across the current source? How do we model it in the small-signal model?
5. (a) What are the two major carrier transport mechanisms in a semiconductor? What is the mechanism in a diode? What is that in a BJT? And what is that in a MOSFET? (b) When using transistors (BJT or MOS) as current sources, why does the output current increase with the voltage across the current source? How do we model it in the small-signal model?
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Transcribed Image Text:5. (a) What are the two major carrier transport mechanisms in a semiconductor? What is
the mechanism in a diode? What is that in a BJT? And what is that in a MOSFET?
(b) When using transistors (BJT or MOS) as current sources, why does the output
current increase with the voltage across the current source? How do we model it in the
small-signal model?
(c) If a common-source amplifier is biased with VDD of 5 V and ID of 2.5 mA.
Determine R₁ and plot the loadline (overlap with I-V curve) to allow a maximum
output swing of the amplifier (neglect the effect of knee voltage). Also, determine the
Q-point, intersection points to the X and Y axes and the slope of the loadline.
VDD=5 V
ID=2.5 mA
Vin
RL
+
DS
ע
lo (mA)
out
VDS (V)
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