Introduction Overview Welcome to EE 133 Analog Communications Design Laboratory Instructor Bob Dutton Office 333 CISX E Mail dutton gloworm Office Hours TBD Course Information including Handouts etc http www stanford edu class ee133 Staff TAs Justin Hwang Jianbo Wang and Tom Lee not to be confused with Prof Tom Lee Advisors Greig Scott MRI group Dave Leeson and other friends of SPAM Support Keith Gaul Miho Nishi 332 CISX This page gives only the most basic information about EE133 For the more complete and up to date information please go to the web site although it probably won t be completely updated until sometime next week The purpose of the first lecture is to give a quick broad brush overview of where we will be headed over the quarter Basically the target is to get you up to speed both from a first order theory perspective and more importantly HANDSON experience with radio frequency RF analog communications circuits 1 Those good old days of RADIO are still here 2 What s fishing got to do with EE133 nothing really but Both are experimental and experience helps and fly poles make good antennae in the MHz range Lab class lectures are driven by need to know Course Description HO 1 tells a bit of the story about what you ll learn but actually there s much more So let s get started o o o o System Level View Information and Spectrum Filtering Amplification Bob s hike across back country of Yosemite August 2001 Warning I have a rather weird sense of the world and am often prone to tell rather random stories Sorry there are just too many fun and funny stories to tell Anyway today s lecture will first preview the lab project give you a sense that other students have really survived the experience and walk through a very quick outline of system level issues Namely we ll talk about Spectrum how to get some and the dark side of the FCC not wanting you to get too much and very briefly who lives where in the Spectrum at least a few applications that hopefully you can relate to 3 Where are we headed Integrated Spamming Systems I haven t slept for 36 hrs I did all the work and how to design and deal with radio frequency RF signals Inductors and Bi pass Capacitors BFCs Ground Planes Commercial IC Communication Chips SPAM an EE133 code word for Stanford Projects using Angle Modulation Here are TWO SURVIVORS They don t look that unhappy These are Transmit and Receive modules for our SPAM radio Walkie Talkie systems Why SPAM Dutton random humor Stanford Projects in Angle Modulation Angle Modulation as we will discuss in another week or so is the general terminology that covers both Frequency Modulation FM and Phase Modulation PM Look inside the box you ll see a board stuffed with cool RF components Inductors you will come to know and love them Ground Planes you ll wish you could have them magically inserted to help you but alas you get to do paper dolls with copper And ICs these are definitely VERY COOL and usually make life much easier unless they blow out and you have to re solder another one 4 A Word about Lab Notebooks Lab Notebook from DeForest key in Major Patent Battle You need to get and keep a hard bound lab notebook This is stuff that is absolutely KEY for defining and protecting IP When you go for a job inteview after graduation and you show them your EE133 Notebook and IF you ve done a careful diligent job you might find it to be a major asset job experience The DeForest story is amazing He and his arch rival John Armstrong inventor of FM and Hetero dyning had a pitched battle over IP Unfortunately this B lab book was used as evidence even though DeForest couldn t actually explain his invention 5 SPAMMING in the Quad transmit antenna atop Packard Bldg go as far as you can These happy Spammers made it past California Avenue And our able TAs are often heaven sent 133 Alums and T Shirts to memorialize your joyful experience are often created And then there s DEMO DAY date to be announced soon This is the REALLY FUN part of the course and end game for EE133 Basically we hook up your transmitters to a very nice antenna on top of Packard Building and SPAM the World Namely we transmit some random stuff music etc and see how far you can go with your receivers and still get signal that we agree is what WE are sending vs sometimes received signals from other sources In past years we have had receivers that running off 9V batteries and portable antenna or as shown above with the aid of a local sign post have worked at a range of more than one MILE and past California Ave 6 System Level View Wireless transmission of information including both the coding and decoding at Radio Frequencies RF Applications a well known AM FM radio broad casting 500 1800KHz 80 108MHz respectively b walkie talkie radio two way 10 s MHz c cordless phones 700MHz d cell phones 1 2GHz e Wireless LAN 10GHz We ll talk in detail about a b we ll also consider some of the issues at higher frequencies including different coding transmission technologies When talking about coding and decoding we can consider both analog and digital formats For 133 we ll stick to analog The digital is a cool add on but doesn t change the basics of working in the frequency domain There is one interesting aspect of digital however The speed of processors and DSP is moving up in frequencies to the point where using several frequencies I e an intermediate frequency or IF section is not necessary more later The applications listed are only an obvious set of examples and by no means exhaustive A KEY point here is that the frequency spectrum from KHz to GHz is filled with lots of interesting uses I didn t even put TV in there The issues at higher frequencies and using different coding transmission techniques will be discussed only at the end of the quarter They are listed here to round out your view of how the techniques we ll be doing in lab can be super charged and scaled to commercial levels 7 Simple Block Diagram and more Base band to RF up conversion possible use of IF Intermediate Frequency stage RF Transmission Modulated up to MHz and Transmitted Received Signal RF Reception RF to base band down conversion possible use of IF Intermediate Frequency stage MHz Freq MHz Freq Baseband KHz Freq Baseband KHz Freq This block diagram is only trying to point out a few basic points We talk about Baseband as the frequency spectra where your information I e voice music data resides Modulation as we ll see mathematically very soon moves that baseband