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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.
What is the purpose of control word written to control register in 8255? The control words written to control register state an I/O function for every I.O port. The bit D7 of t
Q. Show the Enhancement of MOSFET ? Here also the slab of p type material called the substrate is provided. The substrate is connected to a source terminal. Many discrete devic
#i have an error at in the Matlab power system model..thus i couldn''t run it...
Design two converters - boost-buck (Cuk) and flyback meeting the following criteria: Vin = 15 V ... 35 V Vout = 25 V Output voltage ripple 1% peak to peak Switching frequen
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Q. Why FET is a voltage sensitive device explain from the drain characteristics? The JFET consists of a thin layer of n-type material with two ohmic contacts,the source S and t
#questionhyprid model for cc configuration..
Collection and Payment Systems Payments are currently made in person in most of the places. Only some places payments could be made on line or by the ATM (Automated Teller Mac
Static V- I Characteristics The static V- I characteristics of power diodes is shown in figure 1.2 when the anode is made positive with respect to cathode the power dio
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