Dude, What’s on my Final?

Hot off the rumour mill (1 prob from each section; more emphasis placed on MOSFET and Gates):

KVL/KCL/Equivalent circuits
Transients
Bode
Op Amp
Diode Circuits
MOSFET DC *know how to draw triode region!
Gates (Diode, Logic, CMOS)

Discussion 8 Notes

From the discussion on doping and pn junctions. Note that you will not need to know lots of this stuff, esp the physics. This was a modification by the prof b/c of EE42 students.

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Worksheet 3 Solutions

Sorry that some parts got cut off. This is a result of ordering a quick scan =P. Also note that problem 2’s cosine wave should be shifted by 1/8 and not 1/4. Otherwise, cosine and sine will be in phase and you won’t get a special output. Also, I labeled the intervals wrong for that problem. Each period of a wave should have a length of 1.

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Midterm Prep Materials

I know the midterm is coming up. Several tips to consider:

On Friday, CCH made a list of the *content* of the midterm. Study those.

Positive feedback for op amps and the small signal model for diodes (shockley) are guaranteed not to be on the midterm. (confirmed by CCH)

Clipper circuits, nonideal behaviour for op amps, and power/efficiency calculations will *most likely* not be on there (they haven’t been emphasized in class and homework). Most likely means that I haven’t received confirmation that they aren’t on, but can surmise that.

Redo the homework problems issued that *aren’t* from the book (they’re made by the TAs that write the exam ).

Study as many practice tests as you can. hkn.berkeley.edu, tbp.berkeley.edu, ocw.mit.edu, Umich’s sample midterms, and the professor’s reader are good sources.

The midterm will likely give you a complex circuit combining many parts in a configuration that you *haven’t* seen before. You can, however, analyze them with the same *principles*.

It’s good to be able to recognize first/second order, high/low pass filters on sight (see my discussion notes). It’ll save time and let you corroborate your answers.

Use your intuition. See if your answer matches how you think the circuit will behave.

There will most likely be 4 problems.

Each problem will likely guide you though a problem and each step will likely contribute to the next section.

With those said, the exam will test you on your ability to analyze and separate complex circuits. Focus on understanding and methods rather than memorizing common circuits.

Don’t forget to review phasors and complex impedence.

It’s very possible that we decide to test you on a combination of elements, such as inserting diodes into op amps or asking you to do complex analysis with an op amp filter. Don’t be intimidated.

I found a good list of op amps. It’s likely that the circuit you see will resemble some of the more advanced ones available here.

Good luck!

Extra Diode Problems

If you want some practice with diodes, here are some good problems.

Diode Problems

Bode Plot Guide and Discussion 7 Notes

I passed out a copy of Anil’s bode plot guide available here.

Discussion 6 notes aren’t up yet. I have to rewrite them. The discussion notes on 2nd order bode plots are up here though.

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Discussion 5 Notes

Sorry for the bad discussion last Monday on bode plots. I’m rewriting my notes and will have a clearer way of doing things online soon. I’ll also revisit the whole bode plot thing from the beginning next Monday.

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Discussion 4 Notes

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Discussion 3 Notes

Here they are:

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Discussion 2 Notes

They are uploaded:

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Btw, for the homework problem, P2.35 that many of you were asking about, here is a hint:

You have two resistors, R1 and R2 in series. Imagine that the device is in parallel with one of the two resistors. The voltage source is always 9V. You need to solve for the resistors with two equations, which can be formed by writing voltage divider equations assuming that 1. i = 0A and VL = 5V or 2. i = 25mA and VL = 4V.