Lab 1 was designed to help you familiarize yourself with the transistor-based design process. Skills you should be very comfortable with now include: biasing, small signal vs large signal analysis, AC coupling and grounding, oscilloscope and multimeter measurement techniques, and layout techniques (from appendices B, C, D, E, and F in Dr. Lundberg's notes). You should also be familiar with the lab layout, staff [John Sweeny, so you can get more components, cables, or tools if you need them], and eccentricities [signal generator output impedances, noisy power supplies, tagging broken equipment].
If you have any doubts or questions about the material above, please let the me know as soon as possible.
Lab 2 is designed to test your ability as an analog designer. The specifications for lab 2 have a much smaller solution set that is not achievable without effort. The staff have posted a number of documents to help you along, including some reference material on the lab handout, the Lab Reference posted on Stellar, and the appendices from Dr. Lundberg's notes. If you haven't read these, you really should, as they'll save you hours of debugging. What has not yet been covered and doesn't fall under the material we already expect you to know (but does fall under the material we expect you to learn) will be detailed in the post to follow.
High Frequency Techniques:
When dealing with high frequency signals, implementing ideal circuit topologies requires careful consideration of the physical circuit structure, as parasitics formed by the circuit structure come into play. We have already covered a number of ways to minimize the effects of parasitics, but there are some topics we haven't talked about yet.
Frequency Dependent Attenuator:
As the source frequency changes, parasitics of the attenuator come into play. You may find various resonances and modes that alter the effective attenuation ratio. You can improve the flatness of your attenuator's frequency response by laying out your attenuator to minimize these parasitics, or by soldering your attenuator using the soldering iron in lab. Additionally, reducing the attenuation factor improves the frequency response of your attenuator by reducing the overall impedance seen at any node in the attenuator. Keep attenuator resistors small.
Nick and I went to pleasure bay one saturday afternoon. we biked over to see how feasible kiteboarding is. turns out it's a great spot to learn.
An afternoon at miters. Mangoes, Kite-flying, and Machining.
"He was sure that it made no difference to her on which day he appeared: for her, every day was the same, and when each day is the same as the next, it's because people fail to recognize the good things that happen in their lives every day that the sun rises."
-Paulo Coelho, The Alchemist
I spent the morning helping young folk in the Edgerton Center. Taught two of them how to use a saw, read electronic components, and identify some tools. One of them told me that I was really cool. He wished that I was a student in the program as opposed to a teacher.
I took a nap and spent the night reading "The Alchemist".
Listen to Ten Thousand Lines by Electric President.
I've been eating my mangoes in slices these days.
and saving the pits for growin'.
plantin' mangos, payin' bills, windsurfing and dancing at the cambridge block party.