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You are asked to design a DSB-SC modulator to generate a modulated signal Am(t)cos(at) with the carrier frequency f= 300 kHz (@=2лx 300,000). The following equipment is available: (i) a cosine wave generator of frequency 100 kHz; (ii) a ring modulator; (iii) a bandpass filter with adjustable center frequency tunable from 100 kHz to 500 kHz; (iv) a message amplifier with settable gain. (a) Draw a block diagram of a system that will generate the desired signal, and explain how it works. (b) Specify the required center frequency of the bandpass filter. (c) If the modulator output is required to be 400m(t)cos(at), what should be the amplifier gain to be used on the input m(t) to obtain the desired output signal amplitude? (Hint: It is not 400.)

You are asked to design a DSB-SC modulator to generate a modulated signal Am(t)cos(at) with the carrier frequency f= 300 kHz (@=2лx 300,000). The following equipment is available: (i) a cosine wave generator of frequency 100 kHz; (ii) a ring modulator; (iii) a bandpass filter with adjustable center frequency tunable from 100 kHz to 500 kHz; (iv) a message amplifier with settable gain. (a) Draw a block diagram of a system that will generate the desired signal, and explain how it works. (b) Specify the required center frequency of the bandpass filter. (c) If the modulator output is required to be 400m(t)cos(at), what should be the amplifier gain to be used on the input m(t) to obtain the desired output signal amplitude? (Hint: It is not 400.)

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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You are asked to design a DSB-SC modulator to generate a modulated signal Am(t)cos(@t) with the carrier frequency f. = 300 kHz (@=2лx 300,000). The following equipment is available: (i) a cosine wave generator of frequency 100 kHz; (ii) a ring modulator; (iii) a bandpass filter with adjustable center frequency tunable from 100 kHz to 500 kHz; (iv) a message amplifier with settable gain. (a) Draw a block diagram of a system that will generate the desired signal, and explain how it works. (b) Specify the required center frequency of the bandpass filter. (c) If the modulator output is required to be 400m(t)cos(@t), what should be the amplifier gain to be used on the input m(t) to obtain the desired output signal amplitude? (Hint: It is not 400.)
Transcribed Image Text:You are asked to design a DSB-SC modulator to generate a modulated signal Am(t)cos(@t) with the carrier frequency f. = 300 kHz (@=2лx 300,000). The following equipment is available: (i) a cosine wave generator of frequency 100 kHz; (ii) a ring modulator; (iii) a bandpass filter with adjustable center frequency tunable from 100 kHz to 500 kHz; (iv) a message amplifier with settable gain. (a) Draw a block diagram of a system that will generate the desired signal, and explain how it works. (b) Specify the required center frequency of the bandpass filter. (c) If the modulator output is required to be 400m(t)cos(@t), what should be the amplifier gain to be used on the input m(t) to obtain the desired output signal amplitude? (Hint: It is not 400.)
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