The part of the electromagnetic spectrum referred to as the microwave region loosely includes 1-300 GHz for practical purposes. These microwave bands are especially advantageous for transmission services such as satellite transmission, telephone transmission, broadcasting of commercial radio & television, … Read more
Tag: Telecommunication
Phase-Locked Loops (PLL) – Features, Operation & Applications
Features of a Phase-Locked Loop (PLL)
A phase-locked loop (PLL) is a form of a servo system which consists of a phase detector, low-pass filter and voltage controlled-oscillator (VCO) as illustrated in the block diagram below. The phase detector compares … Read more
Diode & Filter Applications in Amplitude Modulation (AM) Detection Circuits
The operation of a typical AM audio frequency signal is illustrated in the Figure 1.0 where vin is the modulated signal that is shown Figure 1.1.
A typical amplitude modulated signal that is fed … Read more
How Cellular Communication Systems Works
In cellular communication systems, there is a two-way wireless transmission between the cellular phone handset and the base station tower. The cell phone converts the audio signals into electrical form using a microphone. This information is imposed on a high … Read more
What is the difference between Broadband and Baseband Transmission?
Broadband transmission is used for a network in which information is modulated onto a radio frequency carrier which passes through the transmission medium such as a coaxial cable. Broadband transmission allows a number of modulated radio frequency carriers to be … Read more