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An FM modulator has fc = 2000 Hz and fd=
a. What is the modulation index?
b. Sketch, approximately to scale, the magnitude spectrum of the modulator output. Show all frequencies of interest.
c. Is this narrowband FM? Why?
d. If the same m (t) is used for a phase modulator, what must kp be to yield the index given in (a)?
find the fourier series coefficients of z(t) (use the results of a) and b) along with the multiplication property of continuous time fourier series coefficients). find the fourier series coefficients of z(t) through direct expansion of z(t) in tri..
A constant current, I, is applied to charge a parallel plate capacitor of area A and separation between plates, d. What is the E field strength inside the capacitor as a function of time What is the displacement 'current' density between the plates, ..
A new 24-bit processor is being designed for operation in a cell phone (you can assume the word-size is 24 bits). Suppose the following memory values are being stored in memory that is organized where each location is 8-bits wide (byte addressable..
Derive a state table for the FSM that produces z=1 when it detects that either the sequence w:0010 or w:1110 has been applied; otherwise, z=0. After the fourth clock pulse, the machine has to be again in the reset state, ready for the next sequenc..
If a standard telephone quality analog-to-digital converter has an input range of 4 Vpp and an output data rate of 128 kbps, then what is the voltage range for each quantization level
Efficiency in a power transformer is 98.6 percent when loaded such that its copper losses are five times its core losses. Calculate the per unit resistance of this transformer.
A 12-kW, 120-V dc series generator has a series field resistance of 0.05 Ω. The generaated emf is 135V when the generator delivers the rated load at its rated terminal voltage. What is the armature resistance
given the narrow audio bandwidth of a telephone transmission facility a nominal snr of 56db 400000 and a distortion
When a voltage v(t)=250 sin[314t-(pi/4)] is applied to a circuit,the current in the circuit is found to be i(t)=50 sin[314t-(pi/2)] amperes. Find the circuit elements,power & power factor.
Two voltage waves of equal amplitude, V0, and frequency w, propagate in the forward z direction in a lossless transmission line of characteristic impedence Z0. One waves is phase-shifted from the other by \o radians.
Suppose that we need to combine (in series or in parallel) an unknown inductance L with a second inductance of 4H to attain an equivalent inductance of 7H. Should L be laced in series or in parallel with the original inductance? What value is req..
A plant expansion is planned in which 4 morelarge 4-kV motors must be added to the system. The current switch gear can not supply all 10 motors, because both the switch gear bus rating and the transformer rating would be exceeded.
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