Amateur Radio Theory Articles
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...
IC 741 Tutorial
What exactly is an OPerational AMPlifier? Let's define what that component is and look at the parameters of this...