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so as to vary logical effort, g. The input capacitance, C
in
changes as the width of the
MOSFET's change, as a result the logical effort, g and electrical effort, h also
changes. To keep the electrical effort, h value as constant so as to capture only the
effect of logical effort, g the output load capacitance, C
out
is also changed. Fig. 3
shows that Power, P is directly proportional to logical effort, g.
Fig. 4.
Graph showing power and logical effort
Another factor which changes the power, P is the change in electrical effort, h.
Hence, the effect of change of h is captured by changing the output load, C
out
while
the width of the MOSFET's is kept constant, which keeps input capacitance, C
in
to be
constant. With change in C
out
the logical effort, g and parasitic, p remains constant
and hence, the change in power is only due to the change in electrical effort value.
Fig. 5 also shows that power, P is directly proportional to the electrical effort.
Fig. 5.
Graph showing power and electrical effort
