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An AM modulator operates with the message signal: m(t) = 9 cos(20πt) - 8 cos(60πt).The unmodulated carrier is given by 110 cos(200πt), and the system operates with an index of 1/2.
a. Write the equation for mn(t), the normalized signal with a minimum value of -1.b. Determine (m2n(t)), the power in mn(t).c. Determine the efficiency of the modulator.d. Sketch the double-sided spectrum of xc(t), the modulator output, giving the weights and frequencies of all components.
Design a circuit that satisfies the equation VOUT = - 3 * VB - 2 * VA. Draw the circuit schematic identifying supply voltages and show your work on component selection
A negative feedback amplifier has a close-loop gain Af=100 and an open-loop gain A=105. What is the feedback factor If a manufacturing error results in a reduction of A to 103, what close-loop gain results
How could the rising-tone acoustical illusion be modified to obtain a tone that goes up and down in pitch at the same time.
Given f1(t) = 28.2843 cos ( 100t - 30) and f2(t) = 14.1421 sin (100t + 15), what's the phasor value of f1(t), F1 and f2(t), F2 The sum of f1(t) and f(2)t is f3(t), where f3(t) = Fm cos(100t - theta)
If R1 = 220 k Ohms , R2 = 56 k Ohms, Rc = 6.8 k Ohms, RE = 2.2 k Ohms, B= 180, rO = 50 k Ohms, C1 = C2 = 10 uF, CE = 100 uF, and Vcc = 20 V, determine the voltage gain AV.
Design an open-circuited, shunt stub matching network to match a 125 + j20 ohm load to a 700 MHz, 50ohm generator. Show the lengths of your transmission lines in fractions of a wavelength.
An angle-modulated signal with carrier frequency ???ωc=2πx106 is described by the equation φEM(t) =10cos(ωct +0.1sin200πt) (a) find the power of the modulated signal. (b) find the frequency deviation Δf. (c) find the phase deviation ΔΦ.
What are the respective advantages and disadvantages of the asynchronous and synchronous communication modes from a reliability perspective?
Use the concept of phasor to combine each of the following sinusoidal functions into a single trigonometric expression: (a) y = 50cos(500t + 60) + 100cos( 500t - 30) (b) y = 200 cos( 377t + 60) -100sin( 377t + 150)
There are three gates. Each gate can be opened or closed depending on the three logic inputs: (a, b, c). Gate open logic=1, gate close= logic 0. Design a logic circuit so that no adjacent gates or outputs (x, y, z) are open at the same time.
A µ-law compression encoder has: Vi(max) = 8 V, vi(max) = 1V, µ = 255 Determine the output voltage for an input voltage of 2 V
Design a filter for a biomedical instrument to eliminate DC (f = 0), 500 Hz tone, and its corresponding harmonics. The system sampling rate is 2,000 Hz. Place all the required poles at the origin to obtain a FIR filter.
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