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Q. Explain Radio and Television Broadcasting?
Radio (AM and FM) and television broadcasting are the most familiar forms of communication via analog transmission systems. The receiver most commonly used in AM radio broadcasting is the superheterodyne receiver, shown in Figure, which consists of a radio-frequency (RF) tuned amplifier, mixer, local oscillator, intermediate frequency (IF) amplifier, envelope detector, audio-frequency amplifier, and a loudspeaker. Tuning at the desired radio frequency fc is achieved by a variable capacitor, which simultaneously tunes the RF amplifier and the frequency fLO of the local oscillator. Every AM radio signal, in a superheterodyne receiver, is converted to a common IF frequency of fIF = |fc - fLO| = 455 kHz, which allows the use of a single tuned IF amplifier for signals from any radio station in the frequency band. Matching the bandwidth of the transmitted signal, the IF amplifier is set to have a bandwidth of 10 kHz.
Diac Diac is a device which has di electrode and as its name suggests it works on AC. The cross sectional view of a diac is shown if the four layers are PNPN and PNPN .
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does wein bridge can be used for frequency measurement? how it is possible?
Explain Magnetostriction. Magnetostriction: If ferromagnetic materials are magnetized a small change of dimensions of the material obtains place. There is a small extension alo
With a maximum excess delay of and a chip duration of , the multipath components fall in delay bins. This means that we experience leakage of energy between chips and the channel i
Now that you have the input and output impedances you can design the matching networks. I will require either the Smith Charts showing how you calculated the matching components or
Q. Consider a current element I 1 d ¯l 1 = 10 dz ¯az kA located at (0,0,1) and another I 2 d ¯ l 2 = 5dx ¯ax kA located at (0,1,0). Compute d ¯F 21 and d ¯F 12 experienced by
Covalent Bonding Exhibited through the diamond lattice semiconductors. Each atom enclosed by four nearest neighbors, each comprising four electrons in the outermost orbi
Systems such as those encountered in mechanics, thermodynamics, and hydraulics can be represented by analogous electric networks, from the response of which the system characterist
Ask questio8. A road 300 m long is required to be illuminated by providing 40W fluorescent lamps. The width of the road is 4m. Design a street lighting scheme for obtaining minimu
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