CMOS DESIGN (EC-603 (B)) - Important Questions

Define threshold voltage, derive its expression and discuss its dependence on various parameters.

Realize NMOS complex logic gates using the Boolean function Z = A(D + C) + BE.

The output Z of a fundamental mode, two input sequential circuit is to change from 0 to 1 only when x2 changes from 0 to 1 while x1=1. The output changes from 1 to 0 only when x1 changes from 1 to 0 while x2=1. Derive the flow table, excitation map and realize the circuit.

Draw the state diagrams of a sequence detector which can detect 101.

Analyze the behavior of an asynchronous sequential toggle circuit with flow table.

Explain with neat diagrams the various NMOS fabrication technology.

Draw and explain BiCMOS inverter circuit.

How to construct a resistor using MOS transistor?

With the help of required expressions explain Sub-threshold MOS Model.

Discuss transient analysis of CMOS transmission gate using resistor equivalent circuit.

Design an Ex-OR gate using transmission gate logic.

Explain Mealy and Moore model machines with state table and transition diagram. Compare the two models.

Compare fundamental mode and pulse mode asynchronous sequential machines with suitable examples and flow tables.

Write short notes on the following: (i) Realization of state diagram and state table from verbal description (ii) State reduction and state assignment in sequential systems.