Electronics & Circuit Theory

How radio circuits work — impedance, resonance, filters, amplifiers, and oscillators explained simply.

Lessons (6)Quiz (15)
1

What is Impedance? (And Why Radios Care)

›
2

Resonance — The Sweet Spot

›
3

Filters — Letting the Right Signals Through

›
4

Amplifier Classes — Getting Power to the Antenna

›
5

Oscillators — Making the Radio Frequency

›
6

AGC and Power Supplies

›