Electrical Engineering Principles
Circuits beyond DC: AC, filters, switching and supplies
Everything so far assumed steady voltages. Real signals change, and the moment they do, capacitors and inductors start behaving in ways DC analysis cannot describe. This is where circuit design properly begins.
Circuits That Change
Reactance, filters, switching and power
- AC, Reactance & ImpedanceFreeWhy Ohm's law needs extending once signals move, and how a capacitor can oppose current without dissipating any power.14 min
- Filters & Frequency ResponseFreeBuilding a circuit that keeps the frequencies you want and rejects the rest, and reading its behaviour off a graph.14 min
- Transistors & SwitchingFreeUsing a small signal to control a large current, and why a transistor used as a switch must be driven hard.14 min
- Power Supplies & RegulationFreeTurning an unhelpful voltage into a stable one, and choosing between the simple option and the efficient one.13 min
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