Tentative TAs, and Office Hours:
- Tony Forzley: ? ?-? (?) room ME 5137, this is a room
inside of the Blue
Room, ME 5138 tforzley{at}doe.carleton.ca
- Saber Amini ? ?-? ME 5138 (Blue Room)
samini{at}connect.carleton.ca
Final Exam Monday December 8. 19:00-22:00, AT
301
Monday Dec 8, Discovered errors in Exam 2006 Q2 part (c) L should
be 16.545 nH instead of 16.645 nH.
part (e) C should be 0.106 pF instead of 0.196 pF.
Review Session Saturday Dec. 6, 1:00-2:30, ME 3275
Students should have worked through a number of problems and
come prepared with questions. Students should not expect me to
teach the course again - that is what the term was for. By now
you should be familiar with the fundamental concepts, and be
working on some of the more subtle points.
Office Hours for Prof. Plett
- Tentatively Fri: 1:30-3:30 - I will be at Carleton, but may
be downstairs in the lab, ME 4135, or computer room.
- I expect to be at Carleton nearly every day, so you are
welcome to come see me any time I am there, (but preferably not
just before one of my lectures).
Lab 3 Info
As of Nov 19, 2009, it was noticed that the oscillator was missing
a base capacitor. I have now updated the zap file to include
the capacitor. Note that the plots no longer match what is in
the pdf file (that will likely be updated shortly as well). As
a result of missing this capacitor, the loop gain was highly
reduced, since a well-designed common base amplifier really does
need the base to be grounded properly. As well, without the base
capacitor, frequency was also affected and it was difficult to
explain the differences between theory, open loop response, and
closed loop response. With the capacitor, the explanation makes
a lot more sense.
Lab 2 Info
Friday Oct 10 is university day, but the Friday lab will
run as scheduled. If you cannot make it due to prior plans, please
make alternate arrangements (e.g., attend Wednesday or Thursday
lab) and make sure the TAs and I are aware of it
Lab parts: Nagui has informed me that lab parts (mixer chip,
inductors, potentiometer, screwdriver) will be available in our
lab, ME4135 on Monday Oct 6 and Tuesday Oct 7 from 10:00-12:00.
A deposit will be required to ensure that these parts are returned.
Inductor Q at 100 kHz and 1.2 MHz.
(Inductors are not yet finalized for 2007 - this is from 2006)
From results, we suggest you use the 33 uH inductor to get the
highest parallel resistance. In the lab you can measure Q at
100 kHz, then estimate Q at 800 kHz by assuming Q is proportional
to the square root of frequency.
At the end is a plot showing how the filter affects gain.
SPICE File For mixer
This is not required for the lab, but you may find it interesting
and useful. Note, this is a nonlinear circuit, so simulations
are in the time domain. Tos see output spectrum including harmonics
and intermodulation components, run the fft on the output transient
waveform. Note that for this simulation, discrete 2N3904 transistors
have been used, but in spite of this, the results are quite realistic.
Photo of a Neatly Constructed
Mixer Board. Note that pin 7 has been used as an interconnect
point. It is labelled on the diagram as NC for No Connect. Often
it is not a good idea to use such pins, but in this case it seems
to work. (I still wouldn't do it though.) Also, note the yellow
wire hides a connection. Don't believe it?
Check out this picture from a different angle.
Lab 2, Mixer: Important Points:
-
Do construction ahead of time, if possible to save about one
hour of lab time.
-
Bring your breadboard, wire strippers, in case modifications
are needed, and mini screwdriver for adjustment.
-
Bring a floppy to store measurement results from scope. Note at some
stations, the scopes are connected to the computers so plots may be
saved directly.
Lab 1 Info
Labs can be handed in at the appropriate box, or to me directly,
for example in my office. If I am not there, reports can be slid
under my office door.
Assignment 1: Due in class Tuesday October 7, 4:05 PM.
Link to the year 2007.
Link to the year 2006.
Link to the year 2005.
Link to the year 2004.
Link to the year 2003.
Course Objective
To learn about the design of
communications circuits. In other courses, the block diagram
approach has been used but in this course the emphasis will be
on the actual circuitry which makes up these blocks. Examples
of such blocks are tuned amplifiers, mixers, oscillators, phase
shifters and detectors. Communications systems considered are
AM, FM, television and telephony. Use of the PLL will be discussed.
Course Content
- Introduction to Telecommunications:
Components of a radio systems; noise, distortion impedance matching.
- Mixers and Modulators:
- Phase-Locked Loop and Applications:
Introduction to PLLs and applications such as:
synthesizers and FM demodulation.
- Oscillators:
- Frequency modulators and demodulators:
- Television Systems:
Transmission of intensity, color, retrace, blanking, and sound;
generation of the video signal, conversion of the video signal
to picture and sound. Other topics may include high-definition
TV, stereo sound.
Labs
Simulation Labs and Hardware Labs - Groups of 2, one writeup
per group, due one week after the scheduled lab day, 4:15 PM.
- Tuned Amplifiers: (Dates tentative)
(September 24, 25, 26 Simulation Lab. Design and simulation (in ADS)
of a 6 MHz tuned amplifier, built with a bipolar transistor and
passive components. You will learn about use of transistor parameters,
tuned circuits, noise figure, and impedance matching.
- Mixers and Modulators:
(October 8, 9, 10, [note Oct 10 is University Day]) Use of an
analog multiplier on an IC to build frequency changers.
- Phase-Locked Loops:
(October 22, 23, 24 and November 5, 6, 7) Use of a commercially
available package to build a tracking filter, a synthesizer and
a an FM demodulator. The IC contains a voltage-controlled oscillator
a phase detector, and amplifiers. In this lab, the VCO and phase
detector will be characterized, then a complete phased-lock loop
will be built. The main external components will consist of a
simple loop filter and a divider to realize the synthesizer.
Marks:
a) Three assignments worth 5% each
b) Three Labs worth 10, 10,15 (about 20% for demo)
c) One written exam worth 50%.
**** Students must get at least 35% in the final exam. ****
Text:
There is no official course text. The printed course notes should
provide enough material, or some of the references can be consulted.
References:
- Smith,
"Modern Communication Circuits", Second Edition McGraw-Hill 1998, TK6553.S5595
- Krauss, Bostonian, Raab,
"Solid State Radio Engineering", Wiley 1980, TK6553.K73
- Rogers and Plett,
"Radio Frequency Integrated Circuit Design", Artech House 2003
- Hagen,
"Radio Frequency Circuit Design", Cambridge Press, 1997
- William F. Egan,
"Frequency Synthesis by Phase Lock", 2nd Ed. John Wiley & Sons,
2000
- Van der Puije,
"Telecommunication Circuit Design", Wiley 1992, TK5103.V
- Sinnema, McPherson,
"Electronic Communications", Prentice-Hall 1991, TK5101.S537
- Sedra, Smith,
(for intro to tuned amplifiers, oscillators)
- Stremler,
"Introduction to Communication Systems", (or other intro texts)
- Signetics,
"Linear Data Manual Volume 1: Communications", 1987
Password Protected area for Students
For Prof and TAs only: Password Required (L2)
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For Prof and TAs only: Password Required (L3)
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