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Explain how energy efficiency can be traded off for bandwidth efficiency by multilevel modulation schemes. Rank the following modulation schemes: 64-ary PSK, Binary FSK, QPSK in terms of bandwidth efficiency and energy efficiency. Compile two separate lists; put the most efficient one first and the least efficient one last.
Three amplifiers with power gains of 15, 22 and 7 ate cascaded. The input power is 120 micro-W. What is the output power of the final amplifier stage
Determine the peak-to-peak current ripple in the output inductor for a forward converter and determine the output voltage ripple of the converter . We know the following parameters: duty cycle d, input voltage Vin, turn ratio: N1/N2
define a one-dimensional potential well having energies U as a function of position x as follows: U=infinity for x= -1nm to x=0; U=0 eV for x=0 to x=5nm; U=10 eV for x=5nm to x=7nm; U=0 for x>7nm and x
Bob enters a pizza shop and notices there are three different sizes of pizzas available. Sizes are given as the diameter of the pizza in inches. The cost of a pizza is based on the size. Bob would like to know which size of pizza has the lowest co..
The treasure map in the figure gives the following directions to the buried treasure: "Start at the old oak tree, walk due north for 530 paces, then due east for 130 paces. Dig." But when you arrive, you find an angry dragon just north of the tree..
The excess charge in a certain medium decreases to one-third its initial value in 20s. (a) If the conductivity of the medium is10^(4)S/m, what is the dielectric constant of the medium(b) What is the relaxation time
Design a 300W PFC BL-Zeta converter operating in DCM (Output Inductor) to maintain a DC link voltage of 100V with percentage ripple of 4%. The permitted ripple in the input side inductor and intermediate capacitor is given as 20%.
Design an active low pass filter with a cutoff of 10kHz or more by more than 30db and have the pass band gain positive that does not deviate from 20db by more than 3 db. The pass band frequncy need is 800Hz and below.
Message signal m(t) = 0.6sin(27r3000t + pi/9) For a carrier signal with amplitude Ac = 4,fc = 40MHz, What is the signal bandwidth if we use AM with ka = 0.7 DSB-SC FM with kf = 5000 - HZ/V
A shunt DC motor has RA = 0.7-ohm and VT =429.6 V. For an output power of 50.4 hp, we have nm = 1,452 rpm and IA = 110.8 A. The field current remains constant for all parts of this problem. Find the rotational power loss in watts.
The low-voltage winding of a transformer has 200 turns, and the high-voltage coil has 11,000 turns. The transformer is operated as a step-down transformer, and 13.2KVolts is impressed on the primary side.
Consider a series RLC circuit disconnected from a source at t=0. The circuit components are R=3 ohms, C = 500 F, and L = 1 H. We assume that Vc(0-) = 20 V and i(0-) = -0A. a) Find the natural reponse i(t) for t > 0.
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