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3.7 The AM signal s(t) = Ac[1+kam(t)] cos(2nfct) is applied to the system shown in Figure P3.7. Assuming that |kam(t) < 1 for all t and the message signal m(t) is limited to the interval -W≤f≤ W, and that the carrier frequency fr > 2W, show that m(t) can be obtained from the square-rooter output U3(t). s(t) Squarer v1(t) Low-pass 12(t) Square- filter ra(t) rooter V₁ (t) = 5² (t) 13(1)=√√12 (1) Figure P3.7

3.7 The AM signal s(t) = Ac[1+kam(t)] cos(2nfct) is applied to the system shown in Figure P3.7. Assuming that |kam(t) < 1 for all t and the message signal m(t) is limited to the interval -W≤f≤ W, and that the carrier frequency fr > 2W, show that m(t) can be obtained from the square-rooter output U3(t). s(t) Squarer v1(t) Low-pass 12(t) Square- filter ra(t) rooter V₁ (t) = 5² (t) 13(1)=√√12 (1) Figure P3.7

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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3.7 The AM signal s(t) = Ac[1+kam(t)] cos(2nfct) is applied to the system shown in Figure P3.7. Assuming that |kam(t) < 1 for all t and the message signal m(t) is limited to the interval -W≤f≤ W, and that the carrier frequency fr > 2W, show that m(t) can be obtained from the square-rooter output U3(t). s(t) Squarer v1(t) Low-pass 12(t) Square- filter ra(t) rooter V₁ (t) = 5² (t) 13(1)=√√12 (1) Figure P3.7
Transcribed Image Text:3.7 The AM signal s(t) = Ac[1+kam(t)] cos(2nfct) is applied to the system shown in Figure P3.7. Assuming that |kam(t) < 1 for all t and the message signal m(t) is limited to the interval -W≤f≤ W, and that the carrier frequency fr > 2W, show that m(t) can be obtained from the square-rooter output U3(t). s(t) Squarer v1(t) Low-pass 12(t) Square- filter ra(t) rooter V₁ (t) = 5² (t) 13(1)=√√12 (1) Figure P3.7
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