23-02-2013, 12:01 PM
VLSI DESIGN
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1. (a) Tabulate the comparison of various MOS Technologies available with respect to
important characteristics.
(b) Explain briefly about IC production processing steps. (8+8 = 16 Marks)
2. (a) Obtain the expressions for Ids versus Vds of MOS transistor in both regions of
operation.
(b) Draw the circuit diagrams of simple BiCMOS inverter and its improved version and
explain their operation. (8+8 = 16 Marks)
3. (a) Obtain the stick diagram for NAND gate with the aid of NMOS logic diagram. Also
give the procedural steps.
(b) Define the various scaling factors for MOS device parameters.
4. (a) If four pass transistors are connected in series, explain how the propagation delay can
be evaluated with the aid of corresponding delay model.
(b) What are the basic MOS circuit concepts? Explain the concept of Sheet Resistance
applied to MOS Transistors and Inverters.
5. (a) Explain the structured design approach of Parity generator and obtain its stick
diagram.
(b) Explain Twos Complement multiplication using the Baugh-Wooley method.
6. (a) Explain the design approach of PLAs with suitable example.
(b) Give the classification of PLDs. Tabulate the differences between CPLDs and FPGAs
with respect to various characteristics.
7. (a) Explain the terms Simulation, Synthesis and Test vector Generation pertaining to
VLSI Design.
(b) Explain the VHDL Synthesis process with the help of neat schematic diagram.
8. (a) What is CMOS Testing? Explain its need and Testing principles.
(b) Write notes on System-level CMOS Test Techniques.