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Q. What do you mean by communication channel?
The communication channel (transmissionmedium) is the physicalmediumthat is utilized to send the signal from the transmitter to the receiver. In wireless transmission, such as microwave radio, the transmission medium is usually the atmosphere or free space. Telephone channels, on the other hand, employ a variety of physical media such as wire lines and optical fiber cables. Irrespective of the type of physical medium for signal transmission, the essential feature is that the transmitted signal is corrupted in a random manner by a variety of possible mechanisms. For simplicity, the effects of these phenomena (attenuation, distortion, interference, noise, etc.) are shown at the center of Figure, since the transmission medium is often the most vulnerable part of a communication system, particularly over long distances.
Attenuation, caused by losses within the system, reduces the size or strength of the signal, whereas distortion is any alteration of the waveshape itself due to energy storage and/or non-linearities. Contamination by extraneous signals causes interference, whereas noise emanates from sources both internal and external to the system. To eliminate any one of these may pose a challenge to the design engineer.
Define a voltmeter A voltmeter is an instrument used to measure p.d. and must be linked in parallel with the part of the circuit whose p.d. is required.
modes of operation of 8255
Q. Two identical junction diodes whose volt-ampere relation is given by Equation in which I S = 0.1 µA, V T = 25 mV, and η = 2, are connected as shown in Figure. Determine the cu
Q. With a cross sectional view, explain the working of a depletion type MOSFET Draw a biasing amplifier circuit DEPLETION-TYPE MOSFET: Two types of FETs: JFETs and MOSFETs. MOS
sample problem and solutions with answer
Q. At the two terminals (A, B) of a one-port network, the voltage and the current are given to be v(t) =200 √2 cos (377t + 60°) V and i(t) = 10√2 cos(377t + 30°) A. (a) Determin
Factors which affect the inductance of an inductor include: i) The number of turns of wire (N) - more turns the higher the inductance ii) The cross-sectional area of the
Q. Show Power and Power Factor in ac Circuits? Power is the rate of change of energy with respect to time. The unit of power is a watt (W), which is a joule per second (J/s). T
The various flags are: - Sign flag, Axillary flag, Zero flag, Parity flag, Carry flag.
Develop and execute a program to analyze the circuit shown in Figure (a), and use PROBE for plotting v C (t).
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