Electronics I/II
Two semesters on the study of semiconductor physics and devices. Materials included diodes, bipolar-junction transistors (BJT's), field-effect transistors (FET's), and operational amplifiers. DC and AC analysis as well as circuit design was emphasized. The second semester continued with a focus on integrated circuits including the application and analysis of operational amplifiers. We used the PSpice program to simulate and analyze our circuits.
Projects
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Common-source and Cascode FET Amplifiers
ReportIn this project we analyzed and compared a common-source FET amplifier to a cascode FET amplifier. We simulated both in PSpice and obtained their frequency responses and voltage gains. Both amps produce the same voltage gains but the cascode was found to improve the high frequency response because the second added transistor removed direct coupling between the input and output and thus removed the Miller effect.
The two-stage cascode circuit showing a common-source FET feeding into a common-gate FET 
The cascode circuit was found to have a larger frequency response with a high break frequency fh = 12.06MHz -
Stereo Audio Amplifier
ReportFor our final project Jena Macias and I designed and built a stereo audio amplifier using an LM1877 op-amp chip, two 4Ω speaker drivers, and a 9V battery. We added multiple improvements to our circuit to improve audio quality over using just the LM1877 for amplification alone.
Demo of our speaker 
The circuit for our speaker, stereo inputs shown as Vi1 and Vi2, outputs at Vout1 and Vout2 
Our completed circuit