Wednesday, May 6, 2009

FET Capacitance Affects Notes Added

I uploaded several notes pertaining to Field Effect Transistor, Capacitance Affects and Frequency Response to ClassNotes123.com which is part of the Analog and Semiconductor Devices class; an undergraduate course that introduces the topic of nonlinear device. I also added another Satellite Communications homework assignment dealing with look angles. These pages can be located at:

Output Capacitance of a Source Follower Amplifier
Low Frequency Response of a FET Circuit
FET Capacitance Effects
Output Capacitance of a Drain Loaded Amplifier
Satellite Look Angle Problem

I am finishing up two digital logic laboratories which should be online in the next few days. Stay tune for this and more content from ClassNotes123.com

Wednesday, April 29, 2009

Satellite Communications Course Problems Added

For the graduate level Satellite Communications course, I’ve added seven homework problems and solutions dealing with topics as station keeping, orbital dynamics, data transmissions, shallow angle earth stations, and sat to sat data links. These pages can be found at the following links:

Satellite Data Relay
Satellite Propagation Time
Satellite Orbit Position
Satellite Orbit Variables
Satellite Orbit Characteristics
Satellite Earth Station
Satellite Elliptical Orbit

For more on these topics and other electrical engineering course topics, notes, exams, and laboratory experiments visit: ClassNotes123.com

New Technologies are Shifting Telephone Keypad Alphabetic Notation

Expedia.com, Carnival Cruise Lines, and Comcast Cable are three companies out of thousands whose telephone number is also the spelling of the company name when dialed from the keypad of your standard telephone. Most would agree this marketing technique is beneficial to the customer and provides a level of name recognition to the company. But are these companies ready for the technology shift this marketing strategy bases itself on?

We have seen in recent years many people, especially younger individuals, have been moving exclusively to cellular telephones and ditching the landlines of old. While this trend is very well known, a simple yet often overlooked factor is the technology shift from the standard keypad telephone to full text keyboards on many cellular telephone models. Take the Blackberry, or the iPhone; neither device has the standard number / letter combination companies use to denote their telephone number.

For example, on a standard keypad the number 2 is also associated with the letters A, B, and C. However, on a Blackberry with its full keyboard, the number 2 is associated with the letter E.

So what is the solution; simple! Many companies already employ the fix with or without knowing it. Just publish the number itself along with the company name and letter combination. On expedia.com customer support page; both 1-800-EXPEDIA and 1-800-397-3342 are posted. However, on Carnival Cruise Lines webpage, I have been unable to find anything but their 1-888-CARNIVAL number.

By: FreeClassNotesOnline.com

Friday, March 27, 2009

In Person Interview Tips

Thus far we have briefly covered a few resume and telephone interview, prescreen tips. Now let’s jump into a few in-person interview items. Most of the advice you often here is dress the part, be prompt, ask questions, yea, yea, yea. So how do you really pull this off and truly stand out.

The first tip I like to give is realize that you will always forget about half of the questions you intend to cover during the interview, so be prepared to jog your memory. I like to have a portfolio in hand, just a simple flip open with a pad of paper on one side and a place to put a pen or two on the other. You can pick up one rather cheaply so it’s a good investment. I always have at least two extra copies of my formatted and printed resume in the portfolio just in case you sit down with someone who doesn’t have a copy, you’re prepared. One trick I use is, before the interview write down or print out a copy of about 6 to 8 questions or items you wish to cover and slide this in-between the pad of paper with about a half inch of the edge sticking out. During the interview, have pen in hand, your portfolio open and pad ready to write on (note, your cheat sheets edge is poking out a bit). As your interview progresses, casually jot down notes, and casually flip up the pad when approaches to see your notes. This will jog your memory and keep you on point. Do what works for you, I personally like my approach. With pen and paper in hand it also presents the appearance you are actively engaged in the interview and not sitting on your hands expecting someone to ask all the questions.

I mentioned some closing comments in my last post, Telephone Interview Tips so do use these if they fit your situation. Another tip stems from the flow of most interviews. Most person to person interviews often start by discussing the company and/or a department overview, followed by the job description and a Q & A section. Your opportunity often comes next followed by specific compensation negotiations. Now here’s where my tip comes in. If they bring up compensation (i.e. how much do you want to be paid) too early in the discussion, side step it by saying that it is negotiable but to have a better understanding how to base the hourly or salary rate on, you would like to discuss more of the jobs responsibilities. By doing this, you put off any numbers and negations until you have a chance to wow them with your skills. Again you’re selling yourself so if you can avoid committing to any fixed number first do so. You can also use a range or better yet, one I often use is if I’m asked about my salary expectations, I often reply with; is there a salary range you’re trying to stay within for this position?

Let me put this another way. Let’s say for example you want to buy a television at the local store. You find one you like but it doesn’t have a price on it. First off, you’ll probably spend a little more time looking at the TV and searching for a price too. Then you’ll ask a sales person what the price is. What’s going on here is you are “investing time” into your decision, and when the sales person provides you the price you have one of two reactions. It’s either way too high, which will put you back a bit or you’ll consider it. If the price is too high, you may even ask the sales person what is in your price range. You see, if you saw the price without having to put any effort into it first, you may have quickly walked away and dismissed it. Because you now have a feeling of time invested, which includes now involving someone else, the sales person here, you find yourself in a state where you are more likely to buy something. My point here is, turn the tables on your interviewer and make them feel they have time invested in you so it’s harder for them to just simply move onto the next candidate.

Provided by: ClassNotes123.com

Tuesday, March 10, 2009

Microcontrollers and Series-Parallel Labs

And we have more lab updates on ClassNotes123. Yep, two more labs have been uploaded today, the last lab for the Intro Electronics Lab course and the second of three labs dealing with programming and logic analysis with the 68HC11 microcontroller. I should have the third lab in the introduction to microcontroller’s series up by week’s end (I hope, keep your fingers crossed).

Series-Parallel Circuits Lab
Programming the Motorola 68HC11 Lab

Thursday, February 19, 2009

Analog Integrated Circuits Lab Added

Today on ClassNotes123.com, I just added the complete content for the Analog IC Lab, Phase Lock Loop design project which involved reverse engineering a National Semiconductor LM565 and reconstructing it with only discrete devices. The lab walks through the reverse engineering process, breaking down the circuit into each of its components such as the current sources and biasing, phase detector, amplifier stage, filters, Schmitt trigger, etc. This was followed by simulations, constructing the device and measurements. Granted, all the timing specifications were bound to be off given the discrete nature of the reverse engineered design, but a number of specifications were within a reasonable tolerance to the original spec. The lab pages are as follows:

Abstract & Project Overview
DC Current Bias
Phase Detector
Generation of Voltage Controlled Signal
Voltage Controlled Current Source
Schmitt Trigger
CA3046 & CA3096 Transistor Array Characterization
Experimental Verification & Conclusions

Sunday, February 15, 2009

Added One More Electronics Lab Experiment This Evening...

I had some extra time to finish up one last lab for the evening on ClassNotes123. This lab is still part of the Linear Systems Analysis Lab course; dealing with a 2nd order voltage-controlled voltage-source Sallen Key filter in both a Butterworth’s and Chebyshev configuration.