Electronics

The term human–computer interaction (HCI) is used widespread since early 1980s. Second World War provided impetus for studying the interaction between humans…

The Digital to Analog converter is an electronic device which converts digital signal to analog signal. Weighted Resistor and R-2R Ladder are its types.

We use small signal transistor model to analyze h-parameters. A transistor can be treated as a two port terminal.

The block diagram of a TV communication system consists of a TV transmitter and a receiver. The transmitter consists of two units.

The microprocessor 8086 minimum mode and maximum mode operation is decided by signal MN/MX’. When the signal MN/MX’ = 1 the 8086 minimum mode is active.

Boolean algebra which deals  with variables and binary numbers. This algebra helps to simplify the Boolean variables

The three basic transistor configuration are CE, CB and CC. A transistor is a three terminal device Emitter, Base and Collector.

Superposition theorem is applicable to circuits with linear elements. They are not applicable to power since it is a non-linear quantity.

Norton’s equivalent is obtained by source conversion of Thevenin’s equivalent circuit. The short circuit current is then given as Isc=Vth/Rth

The concept of data communication in GPRS is similar to the GSM network. GPRS has data rates of 9.6 to 171 kbps.

Synchronous counter is designed to count the number of clock pulses. This counter is clocked with the same clock signal and at the same time

Errors may rise from different sources and are classified as gross error, systematic error and random errors.

The K-Map is used to simplify the Boolean Functions in a very easy way. The K-Map was introduced by Karnaugh. 

These standards mainly represent the units of measurements which are close to the possible accuracy with help of present day technological.

A number system is a way of writing any number. It can be represented by using any symbols or digits. It provides distinctive representation.

A single-phase induction motor has a cage winding on its rotor and single phase winding on the stator. The size of these motors is very small.

The registers are formed using a group of flip flops. The shift registers are mainly used for transferring data or storing multiple bits.

The State transition matrix is that matrix whose product with the state vector at initial time gives the value of variable x for time t.

An Analog to Digital converter is an electronic device which is used to convert analog signal into digital signal.

A Digital to Analog converter is an electronic device which converts digital signal to analog signal. The digital signals are in the form 0,1.

A function is said to be positive Real function if it has all the poles and zeros on the left half of the S-plane. Re[ H(jw) ] >=0 for all ‘w’

Cell splitting in mobile communication is the process in which the bigger cells split up into smaller ones.

DC Potentiometer is an instrument which measures voltage, current and resistance. It can be used to calibrate ammeter and voltmeter.

Nyquist Stability Criterion gives the frequency response as well as comments on the stability and the relative stability of the system.

The Non-Conventional Energy Sources are those which are available for us at any time and are free of cost.

The Conventional Energy Sources are helpful in producing electrical power generation from Hydro, Thermal, Nuclear and Diesel power stations.

The 8255 microprocessor is also known as Programmable Peripheral Interface. It has 24 I/O pins. The three 8 bit ports are PA, PB, PC.

The circuit which produces the samples of the input voltage and holds those values for a definite amount of time is sample and hold circuit.

An interrupt is a condition that arises during the working of a microprocessor. The interrupts of 8086 initiate interrupt service through ISR

The DC Motor is an electrical machine which converts mechanical energy into electrical energy. It works on the principle of induced emf.