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Q. Commercial FM radio broadcasting?
Commercial FM radio broadcasting utilizes the frequency band of 88 to 108 MHz for the transmission ofmusic and voice signals. The carrier frequencies are separated by 200 kHz, and the peak frequency deviation is fixed at 75 kHz. Each station (out of the possible 100) broadcasts in a channel bandwidth of 200 kHz centered on the carrier. The FM system is capable of presenting higher quality audio to the user than AM because of the larger audio band allowed from 50 Hz to 15 kHz. Distortion at most stations is below 1%. Besides broadcast applications, FM is also used in satellite links, aircraft altimetry, radars, amateur radio, and various two-way radio applications. Because of the larger bandwidth (up to 20 times more than in AM), an FM system has more freedom from interference and better performance in noise than any AM station.
Q. A transistor in a fixed bias amplifier circuit was replaced by another transistor of beta equaling 150 instead of 60.if IB of transistor is equal to 100 microampere and collecto
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What is FMS? Illustrate the components of Flexible Manufacturing System? Discuss the different kinds of Material Handling and Storage Systems?
Q. The loop gain of an elementary feedback control system(see Figure) is given by G(s)·H(s), which is 10/(1+s/2)(1+s/6)(1+s/50). Sketch the asymptotic Bode plot of the loop-gain fu
A step index multi mode fibre along with numerical aperture of 0.2 supports approximately 1000 modes at an 850µm wavelength. Calculate a) What is the diameter of the core? b)
Explain a couple
which ckt. Or components using for irregular ac sine wave change into pure sine wave.......
UJT as a relaxation oscillator The UJT is a highly efficient switch it is used as trigger a device for SCR. No sinusoidal oscillators saw tooth generators phase contro
problem 3.20
Q. What is the speciality of a darlington transistor? A darlington pair behaves like a single transistor with a very high current gain. The total gain of the darlington is the
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