Solutions to Homework 6-1B

6.94

Function is

The W/L ratios for standard NMOS inverter with depletion load are

In the given circuit, worst case path for A,B,C,D,E,F MOS’s will have three MOS’s in series and hence

6.104

Function is

Since power required is twice the standard cell, we find W/L ratios twice as much as in the reference inverters.

The worst case path for A,B,C,D,E contains three MOS’s in series

The worst case path for G contains two MOS’s in series with one of them being E or C with W/L = 12.36/1

Therefore W/L for G is given as

The worst case path for F contains only one MOS.