Types of Frequency Modulator Frequency modulator is a circuit that varies carrier frequency in accordance with the modulating signal. The carrier is generated by either an LC or a crystal oscillator circuit, and so a way must be found to change the frequency of oscillation. In an LC oscillator, the carrier frequency is fixed by … Read more
Phase Modulators and Its Types Phase Modulators:- Most modern FM transmitters use some form of phase modulation to produce indirect FM. The reason for using PM instead of direct FM is that the carrier oscillator can be optimized for frequency accuracy and stability. Crystal oscillators or crystal-controlled frequency synthesizers can be used to set the … Read more
Types of Frequency Demodulator Frequency Demodulator: Any circuit that will convert a frequency variation in the carrier back to a proportional voltage variation can be used to demodulate or detect FM signals. Circuits used to recover the original modulating signal from an FM transmission are called demodulators, detectors, or discriminators. Slope Detectors The simplest frequency … Read more
Digital Transmission of Data ( Digital Communication )The term data refers to information to be communicated. Data is in digital form if it comes from a computer. If the information is in the form of voice, video, or some other analog signal, it can be converted to digital form before it is transmitted. Digital communication … Read more
What is Parallel and Serial Transmission? Transmission:- There are two ways to move binary bits from one place to another: transmit all bits of a word simultaneously or send only 1 bit at a time. These methods are referred to, respectively, as parallel transfer and serial transfer. Parallel Transfer In parallel data transfers, all the … Read more