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Q. Wire-line and Fiber-optic channel?
Wire-line channels are used extensively by the telephone network for voice, data, and video transmission. Twisted-pair wire lines (with a bandwidth of several hundred kHz) and coaxial cable (with a usable bandwidth of several MHz) are basically guided electromagnetic channels.
Fiber-optic channels offer a channel bandwidth that is several orders ofmagnitude larger than coaxial cable channels. The transmitter or modulator in a fiber-optic communication system is a light source, such as a light-emitting diode (LED) or a laser, whose intensity is varied (modulated) with the message signal. The light propagates through the fiber as a light wave and is amplified periodically along the transmission path to compensate for signal attenuation. At the receiver end, the light intensity is detected by a photodiode, whose output is an electric signal that varies in direct proportion to the power of light striking on the photodiode. Optical fiber channels are replacing nearly all wire-line channels in the telephone network.
Drift Current and Diffusion Current : There are two mechanisms in which electrons and holes move through a semiconductor. One of these is termed as drift and other is diffusi
State about the Embedded Web Technology Embedded Web Technology (EWT) This is a new technology which uses the Internet in real time to interact/control with a device which
#question. . =calculate the calcium carbonate equivalent hardness of calcium sulphate of 5gms present in one litre
history of engineering economices
shockely equation?
Hello sir, m engineering final year student, we made a project as I mentioned above, I wanna add some extra feature on it, meant to modified it...want to add up some extra feature
Draw the re-model for the circuit given in figure and calculate: a). The input impedance (β=100), b). The output impedance (r0 = 50 kΩ) and c). The mid-band collector-base
Quite often an amplifier is used as a component of an amplifier circuit. Consider the amplifier circuit shown in Figure, which contains an amplifier block as an internal component.
find the output Y in the circuit
how emitter current equal to collector current
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