EE
2212
PROBLEM
SET 6
S.
G. Burns
Due: Wednesday, 1 March 2017
NOTE 1: I strongly encourage
studying the photonic concepts and
devices from the 20 and 22 February classes (Photonics PowerPoint) even though this problem set doesn’t include many problems. Problems associated with Text Section 3.18
are quite limited but the optoelectronics area is of rapidly growing
importance.
NOTE 2: Table 4.6 on Page 203
provides useful generic FET specifications information. Appendix B also has quite a bit of FET
information. If these data are not
provided in any of the Chapter 4 text problems, use information in Table
4.6. Also the inside of the front cover
has all sorts of useful data. Just below
Table 4.6 on Page 203, you will also find some key constants; also on the
inside of the front cover.
Note 2: I also want to call your attention to the
following link from our WEB page FETNMOSSummary.jpeg and FETPMOSSummary.jpeg
Note 3: Be sure your WEB browser displays symbol
font correctly.
Note 4: Problems 1 and 2 are a bit of
plug-and-chug.
1. Text 3.118 You can use MATLAB or MATHEMATICA to
do this but the most conceptual approach is taking the first derivative and
setting the derivative to zero to find the function maximum or minimum.
2. Solar Panel (Adapted from an old quiz)
This commercial solar panel has an area of 1.6 m2. The I-V curves are
shown below. Estimate/compute values for the quantities indicated. Illustrate your answers on the vendor I-V
curves.
(a)
_____________Reasonable accepted value for
the solar constant above the Earth’s atmosphere.
(b)
_____________Reasonable accepted value for
the solar constant
at the surface of the Earth.
(c)
At the Earth’s surface, the solar spectrum
peaks in the (IR,
Red, Green-Yellow, Blue, UV).
(d)
______ Open Circuit Voltage, VOC.
(e)
______Short Circuit Current, ISC
(f)
_______Estimate of maximum Power Output
corresponding to your answer in Part (b) above and illustrate,
on the graph, how you obtained this
value.
(g)
________________ Panel Conversion Efficiency, %, using
your results from Part (f) above.
Area = 1.6 m2
3. Text Problem 4.1 (Look at Figure 4.2 for guidance) and Text Problem
4.2 as a combination. For Text 4.2
observe that this is Cox, capacitance
per unit area. Watch your units. Usually farads/cm2 are preferred
for the capacitance per unit area
units. When the text and in the industry talks about an MOS capacitor, they are
usually referring to capacitance/unit
area. The total capacitance can then be scaled by the W x L product. This idea of scaling is a very important VLSI design concept. The parallel plate basic capacitor model
works well! We will also soon observe how this plays into imaging and display
applications.
4 Text 4.4 and 4.8 for NMOS and 4.47 for PMOS. Some additional basic calculations to provide
experience in units and
nomenclature. Organize your results in a
table. Appendix B2 has a table defining
the relationships for key FET model
parameters. Refer to the WEB links in
Note 2.
5. From an old quiz. Regions of operation are very important in
circuit design using MOSFETS. Extracted
from an old quiz. For the indicated bias conditions, state whether the FET is operating in the
OHMIC (TRIODE) region, SATURATION
region, or CUTOFF region. Explain your
reasoning. Assume that |VT |
= 2 volts for both the NMOS and PMOS enhancement mode transistors.
M1 __________ M2
__________ M3
__________
M4 __________ M5 __________ M6
__________
This is what
we use for blocking dc and passing ac in many discrete device amplifier
circuits. Synonymous with coupling
capacitor. Also a dc blocking capacitor
is employed in your oscilloscope when switching to AC input using the soft
keys. I’ll explain this in lab.
Consider the signal swing around the Q-Point which established the
dynamic range of a circuit
which we will use in amplifier design
Even though
you are an EE student, there is some information you can use from CS I. Of course, you can always dive deeper into CS
but it messy in more ways than one. I
don’t know if this diagram is covered in more advanced CS courses if you decide
to work on a CprE or CS Minor.
Can you tell that I am a hardware guy!
