PN junction diodes, forward/reverse bias, rectifiers, clippers, clampers, Zener, LED, photodiode.
NPN and PNP transistors, CE, CB, CC configurations, JFET characteristics, biasing, and amplification.
Barkhausen criteria, RC, LC, crystal oscillators, operational amplifiers, and frequency stability.
Number systems, Boolean algebra, logic gates, combinational & sequential circuits, flip-flops.
Basic communication systems, modulation (AM, FM, PM), demodulation, transmitters, and receivers.