Download GTU B.Tech 2020 Winter 7th Sem 2172409 Digital Signal Processing For Power Electronics Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 7th Sem 2172409 Digital Signal Processing For Power Electronics Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2172409 Date:30/01/2021
Subject Name:Digital Signal Processing for Power Electronics
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.



MARKS
Q.1 (a) Give three examples of continuous time signals.
03

(b) Explain the use of Fourier transformation in Power Electronics applications.
04

(c) Explain DT, DTFT, DFT and Z transform in brief.
07


Q.2 (a) Explain Von-Neumann DSP architecture.
03

(b) Explain Harvard Architecture of DSP.
04

(c) Explain the concept of pipelining in DSP using suitable example.
07




Q.3 (a) Find the N point DFT of finite duration sequence of length L given as x(n)=1
03
for 0nL-1 = 0 otherwise; for N=L.

(b) What is reconstruction of signal? Explain the requirement of signal
04
reconstruction.

(c) Derive the relationship between Z and DFT transform.
07




Q.4 (a) What do you understand by frequency domain sampling?
03

(b) Explain round-off effect in digital filters
04

(c) Derive the relationship between Z and Fourier transform.
07



Q.5 (a) How is scaling useful in DSP?
03

(b) Explain ROC and list its properties.
04

(c) Explain DIT FFT algorithm.
07



Q.6 (a) What is quantization effect in computation of DFT?
03

(b) Explain in brief any two applications of DSP in Power Electronics.
04

(c) Explain Radix-2 FFT algorithm.
07
Q.7 (a) Draw an example parallel form structure.
03

(b) Find the mantissa and exponent required respectively to represent `5' in
04
binary floating-point representation.

(c) Discuss cascade realization of FIR system in detail.
07



Q.8 (a) Explain the interconnection of LTI systems in brief.
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)
07
State Space 7) Correlation
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