Electric & electronics engineering

characteristics of an ideal op-amp (operational amplifier)

IDEAL op-amp

There are are many characters op-amp in the market right now. Every company designing their won design for work in new applications. Before a engineer make a design of an op-amp he need to know the IDEAL op-amp characteristics. characteristics of an ideal op-amp (operational amplifier): • Infinite Differential Gain • Zero Common Mode …

Read More »

what is Astable Monostable and Bistable in EEE

Figure 3: Basic animated interactive BJT bistable multivibrator circuit

what is Astable Monostable and Bistable in EEE In the EEE department, students need to know  what is Astable Monostable and Bistable. Basically this three mode are a type of multivibrator circuit. So we can say there are three types of multivibrator circuit. Astable Monostable Bistable Astable: in which the …

Read More »

A short description “TDMA definition and main features TDMA”

Definition of TDMA

A short description “TDMA definition and main features TDMA” Definition of TDMA: Time Division Multiple Access (TDMA) systems divide the radio spectrum into time slots and each time slot is assigned to only one user. In TDMA/TDD half of the time slots in the frame information message would be used …

Read More »

A short description of “FDMA definition and the main features of FDMA”

FDMA definition

A short description of “FDMA definition and the main features of FDMA” Definition of FDMA: Frequency Division Multiple Access (FDMA) assigns individual channels to individual users. Each user is allocated a unique frequency band or channel. These channels are assigned on demand to users. Main Features of FDMA: FDMA channel carries only one …

Read More »

A short description of “Duplexing, Frequency Division Duplexing, Time Division Duplexing”

feature image of eduinblog.com

A short description of “Duplexing, Frequency Division Duplexing, Time Division Duplexing” Duplexing In wireless communication system, it is often desirable to allow the subscriber to send simultaneously information to the base station while receiving information from the base station. This effect is duplexing. Frequency Division Duplexing FDD provides two distinct bands of frequencies for …

Read More »

A short description of “Radio Wave Propagation”

A short description of Radio Wave Propagation

A short description of “Radio Wave Propagation” Radio waves propagate through space as travelling electromagnetic waves. The energy of signals exists in the form of electrical and magnetic fields. Both electrical and magnetic fields vary sinusoidally with time. The two fields always exist together because a change in electrical field generates a magnetic field …

Read More »

A short description of “Three Basic Propagation Mechanisms”

feature image of eduinblog.com

A short description of “Three Basic Propagation Mechanisms” Basic propagation mechanisms – Reflection – Diffraction – Scattering Reflection occurs when a propagating electromagnetic wave impinges upon an object which has very large dimensions when compared to the wavelength, e.g., buildings, walls. Diffraction occurs when the radio path between the transmitter …

Read More »

A short description of “Signal Fading Statistics”

feature image of eduinblog.com

A short description of “Signal Fading Statistics” The rapid variations (fast fading) in signal power caused by local multipaths are represented by Rayleigh distribution. The long-term variations in the mean level are denoted by lognormal distribution. With a LOS propagation path, the Rician distribution is often used for fast fading. Thus, the fading …

Read More »

Powered by moviekillers.com