1. Draw the truth table for the following CMOS circuit.
2. Draw a CMOS circuit for a three input NOR gate.
3. Draw a CMOS circuit for A XOR B.
4. You are to determine how many flip flops can fit on a silicon chip with an area of 1 square inch.
Assume it takes six CMOS transistors to make a flipflop. The following is a top view of a CMOS transistor with the minimum size requirements indicated by a parameter called lambda.
Furthermore, there must be a minimal separation of 4lambda between transistors in both the x and y direction for electrical integrity and for wire connections.
a). How many flipflops if lambda = 1.5 microns ( a reasonable value for late 1980s)? Remember that
1 micron = 1 one-millionth of a meter.
b). How many flipflops if lambda = 1.0 microns ( a common value for 1995)?
c. How many flipflops if lambda = 0.5 microns ( a state-of-the-act value for 1995)?