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Let x(t) be a signal band width to 1 kHz. Amplitude modulation is performed to produce signal g(t) = x(t) sin 2000ϖt. A proposed demodulation technique to illustrated in figure. The ideal low pass filter has cutoff frequency 1 kHz and pass band gain 2. The y(t) would be
  • a)
    2y(t)
  • b)
    Y(t)
  • c)
    1/2 y(t)
  • d)
    0
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Let x(t) be a signal band width to 1 kHz. Amplitude modulation is per...
X1 (t) = y (t) cos ⁡(2000wt)
=x (t) sin⁡ (2000wt) cos⁡ (2000wt)
=1/2x (t) sin⁡ (4000πt)
X1( jω ) = 1/4j {x[ j (ω − 4000π) ] −x [ j (ω−4000π)] }
This implies that
X1( jω ) is zero for |ω| ≤ 2000 ϖ
Because ω < 2ϖfm="" />
When x1 (t) is passed through LPF with cutoff frequency 20000 , the output will be zero
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Let x(t) be a signal band width to 1 kHz. Amplitude modulation is performed to produce signal g(t) = x(t) sin 2000ϖt. A proposed demodulation technique to illustrated in figure. The ideal low pass filter has cutoff frequency 1 kHz and pass band gain 2. The y(t) would bea)2y(t)b)Y(t)c)1/2 y(t)d)0Correct answer is option 'D'. Can you explain this answer?
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Let x(t) be a signal band width to 1 kHz. Amplitude modulation is performed to produce signal g(t) = x(t) sin 2000ϖt. A proposed demodulation technique to illustrated in figure. The ideal low pass filter has cutoff frequency 1 kHz and pass band gain 2. The y(t) would bea)2y(t)b)Y(t)c)1/2 y(t)d)0Correct answer is option 'D'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about Let x(t) be a signal band width to 1 kHz. Amplitude modulation is performed to produce signal g(t) = x(t) sin 2000ϖt. A proposed demodulation technique to illustrated in figure. The ideal low pass filter has cutoff frequency 1 kHz and pass band gain 2. The y(t) would bea)2y(t)b)Y(t)c)1/2 y(t)d)0Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Let x(t) be a signal band width to 1 kHz. Amplitude modulation is performed to produce signal g(t) = x(t) sin 2000ϖt. A proposed demodulation technique to illustrated in figure. The ideal low pass filter has cutoff frequency 1 kHz and pass band gain 2. The y(t) would bea)2y(t)b)Y(t)c)1/2 y(t)d)0Correct answer is option 'D'. Can you explain this answer?.
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