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Question 41988

posted 11 months ago

1. Find the Fourier transform and plot the spectrum of the following signal
v(t)=4 \cos 2 \pi 5000 t \cdot \sin 2 \pi 10000 t

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Question 41990

posted 11 months ago

The exponential Fourier series for someperiodic signal is given by
v(t)=\sum_{n=-\infty}^{\infty} \frac{5|n|}{n^{2}+1} \cdot e^{j 2 \pi 6000 n t}
n=-00if this signal is passed through a band-pass filter with cutoff frequencies fa =10000
\mathrm{HZ} \text { and } f_{C U}=20000 \mathrm{HZ} \text {. }
Plot the spectrum of the input signal from -20000 HZ to 20000 HZ.
c. How much power is contained in the input signal between -20000 HZand 20000 HZ and how much power is contained in the output signal?
b. Write down the equation for the output signal and plot the spectrum of the output signal.
d. What is the output signal bandwidth?

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Question 41989

posted 11 months ago

2. A periodic signal has the following Fourier series representation
v(t)=\sum_{n=1}^{\infty} \frac{3}{2 n-1} \cos 2 \pi n 3000 t \text { is passed through an ideal low-pass filter with }
cutoff frequency of 11 KHZ.
Plot the spectrum of the input signal up to 20 KHZ.
b. Plot the spectrum of the output signal.
с.What is the output signal bandwidth?
d. Calculate the power contained in the output signal.

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Question 38971

posted 1 years ago

13) When two items of electronic equipment are connected together as shown below, maximum SIGNAL transfer takes place when

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Question 38977

posted 1 years ago

19) Is the following Boolean expression for NAND true or false?
A.B= A.B+ A.B+ A.B+ A.B

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Question 38966

posted 1 years ago

The TIME CONSTANT of the RC circuit shown below is given by:

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Question 38974

posted 1 years ago

16)For the logic gates shown above, identify the correct output truth table for each gate and write the table on the answer sheet.

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Question 38976

posted 1 years ago

18)On the answer sheet, write a description of De Morgan's laws.

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Question 38968

posted 1 years ago

10)The RC Circuit is now connected to an ac Voltage source. Which of the statements below are correct?

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Question 38967

posted 1 years ago

The Voltage across the Capacitor is given by the formula:
Using the formula, calculate the time taken for the capacitor to charge to 1/2Vin Given that C=120NF R=47kOhms. Give your answer in milli-Seconds.
V_{c}=V_{i n}\left(1-e^{-\frac{t}{R C}}\right)

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