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4.2-4 You are asked to design a DSB-SC modulator to generate a modulated signal km(t) cos (@ct+0), where m(t) is a signal band-limitedto B Hz.Figure P4.2-4 shows a DSB-SC modulator available in the stock room. The carrier generator available generates not cos wet, but cos wet. Explain whether you would be able to generate the desired signal using only this equipment. You may use any kind of filter you like. (a) What kind of filter is required in Fig. P4.2- 4 (b) Determine the signal spectra at points b and c, and indicate the frequency bands occupjed by these spectra. (c) What is the minimum usable value of wc?

4.2-4 You are asked to design a DSB-SC modulator to generate a modulated signal km(t) cos (@ct+0), where m(t) is a signal band-limitedto B Hz.Figure P4.2-4 shows a DSB-SC modulator available in the stock room. The carrier generator available generates not cos wet, but cos wet. Explain whether you would be able to generate the desired signal using only this equipment. You may use any kind of filter you like. (a) What kind of filter is required in Fig. P4.2- 4 (b) Determine the signal spectra at points b and c, and indicate the frequency bands occupjed by these spectra. (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
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4.2-4 You are asked to design a DSB-SC modulatorto generate a modulated signal km(t) cos (@ct+0), where m(t) is a signal band-limitedto B Hz.Figure P4.2-4 shows a DSB-SC modulator available in the stock room. The carrier generator available generates not cos wet, but cos wet. Explain whether you would be able to generate the desired signal using only this equipment. You may use any kind of filter you like. (a) What kind of filter is required in Fig. P4.2- 4 (b) Determine the signal spectra at points b and c, and indicate the frequency bands occupjed by these spectra. (c) What is the minimum usable value of wc? (d) Would this scheme work if the carrier generator output were sin wet? Explain. (f) Would this scheme workifthecarrier generator output werecos" wet for any integer n 2 2? Figure P.4.2-4 | M(S) m(t) km(t) cos w! Filter cos w,1 -B B
Transcribed Image Text:4.2-4 You are asked to design a DSB-SC modulatorto generate a modulated signal km(t) cos (@ct+0), where m(t) is a signal band-limitedto B Hz.Figure P4.2-4 shows a DSB-SC modulator available in the stock room. The carrier generator available generates not cos wet, but cos wet. Explain whether you would be able to generate the desired signal using only this equipment. You may use any kind of filter you like. (a) What kind of filter is required in Fig. P4.2- 4 (b) Determine the signal spectra at points b and c, and indicate the frequency bands occupjed by these spectra. (c) What is the minimum usable value of wc? (d) Would this scheme work if the carrier generator output were sin wet? Explain. (f) Would this scheme workifthecarrier generator output werecos" wet for any integer n 2 2? Figure P.4.2-4 | M(S) m(t) km(t) cos w! Filter cos w,1 -B B
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