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4.2-6 Amplitude modulators and demodulators can also bebuiltwithout using multipliers. InFig. P4.2- 6, the input ø(t) = m(t), and the amplitude A » lØ(1)|. The two diodes are identical, with a resistance of r ohms in the conducting mode and infinite resistance in the cutoff mode. Show that the output e,(t) is given by eo(t): 2R - w(t) m(t) R+r where w(1) is the switching periodic signal shown in Fig. 2.20a with period 27/We seconds. (a) Hence, show that this circuit can be used as a DSB-SC modulator. (b) How would you use this circuit as a synchronous demodulator for DSB-SC signals. ) A cos w,I -Slope Eft) + R

4.2-6 Amplitude modulators and demodulators can also bebuiltwithout using multipliers. InFig. P4.2- 6, the input ø(t) = m(t), and the amplitude A » lØ(1)|. The two diodes are identical, with a resistance of r ohms in the conducting mode and infinite resistance in the cutoff mode. Show that the output e,(t) is given by eo(t): 2R - w(t) m(t) R+r where w(1) is the switching periodic signal shown in Fig. 2.20a with period 27/We seconds. (a) Hence, show that this circuit can be used as a DSB-SC modulator. (b) How would you use this circuit as a synchronous demodulator for DSB-SC signals. ) A cos w,I -Slope Eft) + R

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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4.2-6 Amplitude modulators and demodulators can also bebuiltwithout using multipliers. InFig. P4.2- 6, the input ø(t) = m(t), and the amplitude A » |ø(?)|. The two diodes are identical, with a resistance of r ohms in the conducting mode and infinite resistance in the cutoff mode. Show that the output e,(t) is given by elt) : 2R w(t) m(t) R+r where w(t) is the switching periodic signal shown in Fig. 2.20a with period 27/We seconds. (a) Hence, show that this circuit can be used as a DSB-SC modulator. (b) How would you use this circuit as a synchronous demodulator for DSB-SC signals. Figure P.4.2-6 A cos wI -Slope - + elt) O() (a) (b)
Transcribed Image Text:4.2-6 Amplitude modulators and demodulators can also bebuiltwithout using multipliers. InFig. P4.2- 6, the input ø(t) = m(t), and the amplitude A » |ø(?)|. The two diodes are identical, with a resistance of r ohms in the conducting mode and infinite resistance in the cutoff mode. Show that the output e,(t) is given by elt) : 2R w(t) m(t) R+r where w(t) is the switching periodic signal shown in Fig. 2.20a with period 27/We seconds. (a) Hence, show that this circuit can be used as a DSB-SC modulator. (b) How would you use this circuit as a synchronous demodulator for DSB-SC signals. Figure P.4.2-6 A cos wI -Slope - + elt) O() (a) (b)
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