Q3| answer the following1-Two important singularity functions are...... and . . these functions are.signals in communications theory.2-A measure of the similarity between one signal and a time delayed version of theother different signal is called...3- A problem that associated with frequency mixer is4- If modulation index equal one, the maximum efficiency is. . For DSB-LC.5-f (1)= 2sin(v3t )+cos(t), 2sin(v3 t) is period at.. .,....then f(t) is almost .. . signal.6- The amount of space in the frequency spectrum required by the signal is called. . for SSD, andand cos(1) is period atof the signal.7- Over long distances there is less selective fading in8- Quality factor is...with a bandwidth of 250 Hz and a center frequency of 750 Hz. Use a 100 nFcapacitor.... signal.if series RLC circuit is connected as band reject filter

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Q3| answer the following . these functions are 1- Two important singularity functions are . .signals in communications theory. .. and 2-A mcasure of the similarity between one signal and a time delayed version of the other different signal is called.... 3-A problem that associated with frequency mixer is

Q3| answer the following . these functions are 1- Two important singularity functions are . .signals in communications theory. .. and 2-A mcasure of the similarity between one signal and a time delayed version of the other different signal is called.... 3-A problem that associated with frequency mixer is

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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2. The output stage of a transmitter requires, owing to supply voltage limitations, a downward impedance transformation of the antenna resistance. The load impedance is 50-Ω. Suppose we wish to deliver 3 Watts of power into such a load at 915 MHz, but the power amplifier has a maximum peak-to-peak sinusoidal voltage of only 7 Volts because of various losses and transistor breakdown problems. Design a two section L-match of low pass type to allow that 3 Watts to be delivered to the 50-Ω load. Assume that all reactive elements are ideal.
(a) Write the expression for the output voltage for the Jones mixer as shown for IBB =2 mA, Vm= 10 mV, RC = 5 kΩ, 2R1 = 1 kΩ, fc = 90 MHz, and fm = 10 MHz. Include the terms for n = 1 and 2. (b) What is the largest value of V1 that satsifies our small-signal assumption?
Problem1: the figure shows multiple modulation schemes for the signal that is given by the dashed line sinusoidal function, the X-axis is the time axis is seconds and the Y-axis is the amplitude. Answer the following: 1. What is the value of the duty cycle in A? 2.What is the quantization noise in a modulator that uses a 4-bits register for the analog to digital conversion of the given sinusoidal signal?
a) Derive an expression for the circuit’s transfer function ?(??). b) Use the result from (a) to determine an equation for the cut-off frequency. c) Choose values for ? and ? that will yield a cut-off frequency of 15 ???.
An analog signal is given as?(?) = 5 + 2 cos(20??) + 3 cos(400??)a) What is the bandwidth of ?(?)? Determine the Nyquist sampling frequency for ?(?), both in radian/sec (?? ), and in Hz (?? ).b) Formulate ?? (??), the signal sampled with the Nyquist frequency.c) Plot frequency spectrum of the sampled signal, ?? (??).d) Determine the filter to reconstruct the signal ?(?).e) Is it possible to reconstruct the signal ?(?) for ?? = 0.004 [s]? State that if aliasing error occurs or not.
-MCQ- FM modulator is used to transmit a cosine message signal with 4V amplitude and 20Hz frequency. The frequency deviation constant kf = 25 Hz/V, the carrier is a cosine sign with an amplitude of 10V and a frequency of 2000Hz. The FM modulated signal is passed through a bandpass filter and 90% of the power of the modulated signal remains. What is the bandwidth of the FM modulated signal in this case? a) 240hz b) 20hz c) 100hz d)200hz
What are the advantages and disadvantages of single-sideband transmission? Briefly describe each.
Problem1 A baseband signal with frequency components from near dc to 15 kHz frequency modulates a 200-kHz carrier, andthe frequency deviation is ±3 kHz. The signal is applied as the input to a cascade of two frequency triplers and onefrequency doubler. Determine the output (a) center frequency, (b) frequency deviation, and (c) deviation ratio (d) A VCO has an unmodulated carrier frequency of 100 MHz and sensitivity of −12 kHz#V. Determine thefrequency when the input signal is set at 5 V.
Type your question here When the input to a given system audio is (4 cos 800 ?? + ??? 2000??) ??, the measured frequency component at 600 ??? is 1mv. Represent the amplifier output – input characteristic by ?? = ?1?? + ?2?? 2 and calculate the numerical values of ?1 and ?2 from the data given.
Bandwidth beta=250Hz, center frequency f0=750Hz of the band-proof circuit consisting of serial LCis desired.If the capacitor value is 100nF, what should the R and L values be?
fi(t) is instantaneous frequency. a) Find fc, fm, kf, β ? b)Write the basic euqation of modulated FM signal?
For an FM modulator with a modulation index mf = 1, a modulating signalVm(t) = Vm sin(2π1000t) and unmodulated carrier Vc(t) = 10 sin(2π500kt),determinea) Number of sets of significant sidebandb) Their amplitudec) Then draw the frequency spectrum showing their relative amplitudesd) Determine the unmodulated carrier power for the FM modulator(assume a load resistance RL = 50 Ω)e) Determine the power in the modulated carrier and each side frequency,and sketch the power spectrum for the modulated wave.