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SATHYABAMA UNIVERSITY
(Established under section 3 of UGC Act, 1956)
Course & Branch: B.E - EEE
Title of the Paper: Computer Aided Design
Sub. Code: 6EEE02(2006)
Date: 08/03/2011
Max. Marks: 80
Time: 3 Hours
Session: FN
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PART - A
(10 X 2 = 20)
Answer ALL the Questions
1. What is the function of format command?
2. What are the uses of function files?
3. Write the expression for current in RL transient circuit.
4. Write the ‘h’ parameter equation for two port network.
5. Define Slew rate.
6. Plot V-I characteristics of Diode Using Matlab.
7. What are the two main data types in Verilog HDI?
8. What is the difference between a gate installation and a module
installation?
9. What is overloading in VHDL?
10. What is library clause and give its syntax?
PART – B
(5 x 12 = 60)
Answer All the Questions
11. A 3-bit A/D converter with analog input X and digital output Y is
represented by the equation. Write a Matlab program to convert
analog signal X to digital signal Y. Assume input X equation and
output Y equation.
(or)
12. (a) Explain the INPUT and OUTPUT commands.
(b) Write Matlab function to obtain the root of the quadratics
equation.
13. Find the potential difference between nodes 1 and 2 and write
MATLAB coding to solve the same.
(or)
 103
10 
14. Given Z Parameters = 
all in  which is representative
6
4

10
10


of a transistor operating in CE configuration, determine V, I, power
gain, input and output impedance. Two ports may be viewed as
driven by an ideal sinusoidal source Vs with 500 resistance and
terminated in 10k  load resistor.
15. For a full wave rectifier with RC Filter shown V(t) = 20 Sin(120t)
and R=100K and C=100F use the Matlab to find the peak to peak
value of dc output voltage.
(b) Discharge time of the capacitor. Write the Matlab program and
solve.
(or)
16. For a NPN transistor with emitter area 5.5mm2 f=98, r=.35,
Vaf=250 and transport current density is 2 x 10-9 A-mm2. Use the
matlab to plot the output characteristics for Vbe=.65 V and assume the
temperature of 300 K. Assume the necessary datas if needed. Write
the Matlab program and solve.
17. Give a gate-level description of a 4 to 1 multiplexer circuit.
(or)
18. Write a decade counter in the structural style of modeling using
VHDL.
19. Write in detail about the package declaration and package body.
Write a simple program enumerating this concept.
(or)
20. Write a VHDL code for decimal to BCD encoder.