Intro Electronics Lab Report

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Refer to the Electronics Module lab manual for details.

Assignment:

  1. Photodiode I-V Characteristics Using the setup provided in lab, generate three to four i-v curves for the photodiode at different light levels (including in darkness). Using Matlab (or your preferred plotting program), plot these on the same graph to see how incident light affects diode i-v characteristics. Give a brief (qualitative) explanation for why photodiodes are best used in reverse bias.
  2. Unknown transfer functions Measure the output of each “black box” in the lab at a variety of frequencies. For each box, plot your results on a log-log scale. You will find it helpful to generate this plot as you collect the data. Based on these plots, identify the kind of circuit/filter each one is (two of them will look similar, but have an important difference - what is it?). Finally, determine a transfer function that can model the circuit, and fit the model to your data, preferably in Matlab or Python rather than excel, to see whether the model makes sense. The four boxes are labeled “A,” “B,” “C,” and “D.”