Name of the University : West Bengal University of Technology
Department : Biomedical Engineering
Degree : B.Tech
Sem : III
Subject Code/Name : BME-301/Biophysical Signals & Systems
Website : wbut.ac.in
Document Type : Previous Year Examination Question Paper
Download Model/Sample Question Paper :
2011 : https://www.pdfquestion.in/uploads/qpaper.wbut.ac.in/6486-2011BME%20-%20301(1).pdf
2012 : https://www.pdfquestion.in/uploads/qpaper.wbut.ac.in/6486-2012BME-301(3).pdf
Biophysical Signals & Systems Question Paper :
Time Allotted : 3 Hours
Full Marks : 70
** The figures in the margin indicate full marks.
** Candidates are required to give their answers in their own words as far as practicable.
Related : West Bengal University of Technology BME302 Human Physiology–I B.Tech Question Paper : www.pdfquestion.in/6482.html
GROUP – A :
( Multiple Choice Type Questions )
1. Choose the correct alternatives for the following : 10 × 1 = 10
i) Fourier series is obtained for ……………….. signal.
a) finite periodic signal
b) infinite periodic signal
c) finite non-periodic signal
d) infinite non-periodic signal.
ii) In wavelet analysis, increased frequency leads to
a) increasing window width
b) increasing window height
c) decreasing window width
d) decreasing window height.
iv) In the electrical model of Blood vessel the capacitor incorporate to indicate its
a) resistivity b) elasticity
c) permeability d) conductivity.
v) Distortion can be reduced by
a) negative feedback b) positive feedback
c) both of these d) none of these.
y[n] = x[n] + x[n +1] is a
a) Causal system b) Non-causal system
c) Stable system d) Both (b) & (c).
vii) The power of the signal x ( t ) = A sin ( ?t ) is
c) Infinite d) None of these.
viii) To eliminate the interference of power line signal during measurement of Bio-Signal, we need
a) Low pass filter
b) High pass filter
c) Band pass filter
d) Notch filter.
ix) By using negative feedback in a system we can reduce
a) Temperature
b) External sensitivity to the system
c) Humidity
d) All of these.
x) X ( n ) = 1/3 [ x ( n ) + x ( n + 1 ) + x ( n + 2 ) ] is
a) BIBO stable b) Not BIBO stable
c) Linear system d) None of these.
GROUP – B : ( Short Answer Type Questions )
Answer any three of the following. 3 × 5 = 15
2. State and prove the Parseval theorem.
3. a) Sketch the signal
b) What do you mean by the time scaling property of
Fourier transform ? 3 + 2
4. Write the properties of Z-transform.
[y(t)] +3[y(t)] +5= x(t)
7. How is the ionic concentration across a cell membrane is maintained ? Explain with the proper electrical equivalent diagram.
GROUP – C : ( Long Answer Type Questions )
Answer any three of the following. : 3 × 15 = 45
8. a) Derive the synthesis and analysis equations of the Fourier transformation. 4
b) A discrete time signal x [ n ] is shown in the figure below : 7
c) Draw a model to show recording of nerve action potential. 4
9. a) What is noise figure ? Find out the net noise figure of a 3-cascade amplifier having fed with an input resistor noise at the first amplifier. Consider the gain and noise figure of the stages of amplifiers be G1, F1; G2, F2 and G3, F3 respectively. 6
b) What is the meaning of noise in physiological signals ? 2
c) What is the equivalent resistance of the 3-stage cascade amplifier as shown in figure below : 7
10. a) Find the power and rms value of the signal
x(t) = A cos “0( t +#) . 3 + 2
b) A pair of sinusoidal signals with a common angular frequency is defined as
ii) Evaluate the amplitude and phase angle of composite sinusoidal signal. 5
Y[n] = X1 [n] + X2 [n]
c) Find the Z-transform and the region of convergence ( ROC ) of the discrete time signal x ( n ) given as
x n ( ) = an for n ” 0 = 0 for n < 0. 5
11. a) Obtain the electrical analogue of fluid flow through a rigid tube and elastic tube. 6
b) What are the electrical and mechanical analogies of
i) fluid flow
ii) volume ? 2
c) Briefly explain the Huxley cross bridge model with mathematical expression. 7
12. a) Draw the electrical model of Rigid & Elastic model of a vessel. 5
b) Represent the immune response by a single system with different block diagram considering different system equations and also find out the transfer function of such system. 4 + 3
c) Model the coronary circulation. 3
13. Write short notes on any three of the following : 3 × 5
a) System linearity
b) Time reversal and time shifting
c) Even and odd signals
d) Sensitivity analysis by Feedback
e) Notch filter and its importance for biomedical signal analysis.