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2) You are asked to design a DSB-SC modulator to generate a modulated signal km(t) cos wc t, where m(t) is a signal band-limited to B Hz. Figure below shows a DSB-SC modulator available in the stock room. The carrier generator available generates not cos wc t, but cos3 wc t. M(f) km(t)cos³ wet m(t) A Filter f a B B cos³ wct a) Sketch the signal spectra at points a and b.(a:1,b:8) b) Is it possible to realize a DSB-SC modulator as in the figure above? (If yes) what kind of filter should be used? Comment on the bandwidth of the filter and the minimum and/or maximum frequencies that the filter should allow to pass. c) What is the minimum usable value of wc?

2) You are asked to design a DSB-SC modulator to generate a modulated signal km(t) cos wc t, where m(t) is a signal band-limited to B Hz. Figure below shows a DSB-SC modulator available in the stock room. The carrier generator available generates not cos wc t, but cos3 wc t. M(f) km(t)cos³ wet m(t) A Filter f a B B cos³ wct a) Sketch the signal spectra at points a and b.(a:1,b:8) b) Is it possible to realize a DSB-SC modulator as in the figure above? (If yes) what kind of filter should be used? Comment on the bandwidth of the filter and the minimum and/or maximum frequencies that the filter should allow to pass. c) What is the minimum usable value of wc?

Introductory Circuit Analysis (13th Edition)
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) You are asked to design a DSB-SC modulator to generate a modulated signal km(t) cos wc t, where m(t) is a signal band-limited to B Hz. Figure below shows a DSB-SC modulator available in the stock room. The carrier generator available generates not cos wc t, but cos3 wc t. M(f) km(t)cos³ w̟t m(t) A Filter b f -B В cos wct a) Sketch the signal spectra at points a and b.(a:1,b:8) b) Is it possible to realize a DSB-SC modulator as in the figure above? (If yes) what kind of filter should be used? Comment on the bandwidth of the filter and the minimum and/or maximum frequencies that the filter should allow to pass. c) What is the minimum usable value of wc?
Transcribed Image Text:2) You are asked to design a DSB-SC modulator to generate a modulated signal km(t) cos wc t, where m(t) is a signal band-limited to B Hz. Figure below shows a DSB-SC modulator available in the stock room. The carrier generator available generates not cos wc t, but cos3 wc t. M(f) km(t)cos³ w̟t m(t) A Filter b f -B В cos wct a) Sketch the signal spectra at points a and b.(a:1,b:8) b) Is it possible to realize a DSB-SC modulator as in the figure above? (If yes) what kind of filter should be used? Comment on the bandwidth of the filter and the minimum and/or maximum frequencies that the filter should allow to pass. c) What is the minimum usable value of wc?
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