Formalizing Amplifier Classifications: technical walkthrough

Section role: supports the formalization of amplifier classifications in Section 3 while the teacher synthesizes student discoveries from the earlier design challenge and derives efficiency limits. Slides: (1) Title and Objectives — Formalizing Amplifier Classes and Efficiency Derivations; (2) Connecting Back to the Design Challenge — reviewing the crossover distortion and dead zone discovered during the 12V speaker challenge; (3) Class A vs. Class B Conduction Angles — side-by-side diagrams comparing 360-degree and 180-degree operation; (4) Mathematical Derivation of Class B Efficiency — step-by-step mathematical proof arriving at pi over 4 or 78.5 percent maximum efficiency; (5) Push-Pull Topology Schematic — how complementary transistors share the waveform; (6) Crossover Distortion Waveform — visual representation of the dead zone at zero volts; (7) Diode Biasing Compensation — circuit diagram showing forward-biased diodes eliminating the dead zone to create Class AB; (8) Thermal Runaway and Junction Temperature — explaining the physical constraints of Tj and thermal limits; (9) Closing slide: 'How does eliminating crossover distortion impact our overall power conversion efficiency?' — sets up the individual performance audit in Section 4.

Lara from Teachy