This download link is referred from the post: AKTU B-Tech Last 10 Years 2010-2020 Previous Question Papers || Dr. A.P.J. Abdul Kalam Technical University
Code: 13A05305
B.Tech II Year I Semester (R13) Supplementary Examinations June 2022
SIGNALS AND SYSTEMS
(Common to ECE and EIE)
Time: 3 hours Max. Marks: 70
Answer all FIVE Questions
All Questions carry equal marks
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- (a) Define signal and system. Explain the classification of signals with examples.
(b) Check whether the following systems are static or dynamic, causal or non-causal, linear or non-linear, and time-variant or time-invariant:
(i) y(t) = x(t) + tx(t-2)
(ii) y(n) = x2(n)
(OR) - (a) Explain about elementary signals.
(b) Find the even and odd components of the following signals:
(i) x(t) = t cos(t) + t2 sin(t)
(ii) x(t) = e-2t u(t) - (a) State and prove the following properties of Fourier Transform:
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(i) Time shifting property
(ii) Frequency shifting property
(b) Find the Fourier transform of the signal x(t) = e-at u(t)
(OR) - (a) Obtain the Fourier series representation of the signal x(t) = A cos(ω0t)
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(b) Find the Fourier transform of the gate function x(t) = A, for |t| < τ and x(t) = 0, for |t| > τ. - (a) Define convolution. Explain the properties of convolution.
(b) Find the convolution of the signals x(t) = e-2t u(t) and h(t) = u(t)
(OR) - (a) Explain the concept of signal transmission through a linear system.
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(b) Find the impulse response of the systems described by the following differential equations:
(i) dy(t)/dt + 2y(t) = x(t)
(ii) d2y(t)/dt2 + 5dy(t)/dt + 6y(t) = x(t) - (a) Define Laplace transform. Explain the properties of Laplace transform.
(b) Find the Laplace transform of the signal x(t) = e-at sin(ωt) u(t)--- Content provided by FirstRanker.com ---
(OR) - (a) Explain about the region of convergence (ROC) of Laplace transform.
(b) Find the inverse Laplace transform of the following functions:
(i) X(s) = 1/(s+1)(s+2)
(ii) X(s) = s/(s2 + 4) - (a) Define Z-transform. Explain the properties of Z-transform.
(b) Find the Z-transform of the signal x(n) = an u(n)
(OR) - (a) Explain about the region of convergence (ROC) of Z-transform.
(b) Find the inverse Z-transform of the following function: X(z) = z/(z-1)(z-2)
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This download link is referred from the post: AKTU B-Tech Last 10 Years 2010-2020 Previous Question Papers || Dr. A.P.J. Abdul Kalam Technical University