Quantities and units. Electricity is a difficult substance to appreciate with the human senses. About the only way you...
Amateur Radio Theory Articles
Telephone System
Semiconductors: Diodes and Transistors
Semiconductors: Diodes & Transistors In the early days of electricity there were only two groups of material:...
FM Detector
FM stands for Frequency Modulation. It means that the RF-frequency will change according to the input audio signal....
Double Sideband Modulation – DSB
Single Side Band – SSB – Part 2
Single Sideband Suppressed Carrier (SSB-SC): Single Sideband Suppressed Carrier (SSB-SC) modulation was the basis for...
Single Side Band – SSB – Part 1
What is Single Side-band? Before you can understand what SSB is, you must understand how audio is transmitted via...
Quad Amplitude Modulation
Quadrature Amplitude Modulation (QAM)- Brief Discussion I & Q modulation, A.K.A., QAM, is a method for sending two...
Modulation Demodulation
Modulation/Demodulation is a Nonlinear Process where Two Sinusoids are Multiplied (F1 x F2). The Product of this...
So What Is A Frequency Synthesizer? The answer to that is easy, it is a programable frequency multiplier, usually...
Frequency Modulation
Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of...
Amplitude Modulation
(1) The low level generation of AM (DSB + Carrier) and the progressive amplification of that RF signal with the...