Radio Receivers Articles: Tuned Radio Frequency Receiver: The Tuned Radio Frequency Receiver is a simple “logical” receiver. A person with just a little knowledge of communications would probably expect all…
Automatic Frequency Control Block Diagram: Automatic frequency control: As previously we see, the heart of an AFC circuit is a frequency-sensitive device, such as the phase discriminator, which produces a…
Squelch Circuit: Squelch (muting): When no carrier is present at the input, i.e., in the absence of transmissions on a given channel or between stations, a sensitive receiver will produce a…
Methods of Suppressing Unwanted Sidebands: As stated earlier, the three practical methods of SSB generation all use the balanced modulator to suppress the carrier, but each uses a different method…
Generation of Amplitude Modulation: There are two types of devices in which it may be necessary to the Generation of Amplitude Modulation. The first of these, the AM transmitter, generates…
Interfacing ICs Articles: Features of 8255 Microprocessor: Here we see programmable peripheral interface (PPI), 8255, designed by Intel. It is a general purpose programmable I/O device used for parallel data…
Features of 8251 Microcontroller: The features of Features of 8251 Microcontroller are namely, 1. The Intel 8251A is an universal synchronous and asynchronous communication controller. 2. It supports standard asynchronous protocol…
Introduction to Modern Power System Articles: Introduction to Modern Power System Planning: In Modern Power System Planning, electric energy is an essential ingredient for the industrial and all-round development of…