So the question then becomes one of the transient state. How long does it take the voltage to reach its intended state (V_CC), and how can we reduce the time needed to do so? Part of the time required depends on the design and physical properties of the materials. There’s really nothing you can do about that, although engineers spend countless hours testing different designs and materials. Fortunately, we can produce the effect of reducing the transient time by increasing the V_CC (or rather increasing the difference between V_SS and V_CC). To illustrate, consider the image below. The red line (V_CC+) indicates the new, increased voltage, while the grey V_CC indicates the default (proper) voltage for the processor.


When we have V_CC+ (or the intended voltage) set to a higher value, it takes less time for our voltage to reach the actual V_CC needed by our logic gates. Now, if we decrease the cycle time, our logic highs still come through as logic highs, thanks to the higher core voltage.


Basically, the voltage produces an exponential curve. By increasing V_CORE, we're causing the voltage to attempt to reach a higher value in the same amount of time. In hurrying up to the higher value, the voltage reaches our original, desired voltage slightly faster. Unfortunately, we don’t have a door example to illustrate this one, so you’ll have to take our word for it!