Download GTU BE/B.Tech 2019 Summer 7th Sem New 2172409 Digital Signal Processing For Power Electronics Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 7th Sem New 2172409 Digital Signal Processing For Power Electronics Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2172409 Date: 27/05/2019

Subject Name: Digital Signal Processing for Power Electronics

Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Define and classify signals. 03
(b) Explain the requirement of Fourier transformation. 04
(c) Describe round-off effect in digital filters. Explain the concept of limit cycle
oscillations.
07

Q.2 (a) What is FFT? List the applications of FFT. 03
(b) Explain Modified Harvard Architecture of DSP. 04
(c) Explain the concept of pipelining in DSP using an example. 07
OR
(c) What is MAC in DSP? Describe its features and advantages in DSP. 07
Q.3 (a) What is ROC? List its properties. 03
(b) List the properties of DTFT. 04
(c) Derive and explain the relationship between Z transform and DFT transform. 07
OR
Q.3 (a) What do you understand by frequency domain sampling? 03
(b) Compare DTFT and DFT. 04
(c) Derive and explain the relationship between Z transform and Fourier
transform.
07
Q.4 (a) What is FFT? What are its types? 03
(b) Explain sampling process and reconstruction of signal. 04
(c) Explain Radix-2 FFT algorithm with a suitable example. 07
OR
Q.4 (a) Explain quantization effects in computation of DFT. 03
(b) Differentiate FFT from DFT. Which one is more efficient and why? 04
(c) Explain DIT FFT algorithm with a suitable example. 07
Q.5 (a) Explain the need of Z transform in Power Electronics applications with
reference to DSP.
03
(b) Explain the interconnection of LTI systems in brief. 04
(c) Discuss cascade realization of FIR system in detail. 07
OR

Q.5 (a) List the applications of DSP in Power Electronics. 03
(b) Sketch the signal represented by x1(t) = ?cos(t) 04
(c) Define: 1) ROC 2) Convolution 3) LTI system 4) Periodicity 5) Aliasing 6)
State Space 7) Correlation
07
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