... (DAC ’09), pp. 386 - 389 , ISBN 9 78- 1-6055 -84 97-3, San Francisco, CA, USA, Jul 2009. Advances in Analog Circuits 216 Fig. 9. Progression of Increasingly Complex Parameter Interactions It ... Source/Drain Implants in Threshold Voltage Matching in Deep Sub-micron CMOS Technologies. 32nd European Solid-State Device Research Conference (ESSDERC 2002), pp. 115-1 18, ISBN 88 -90 084 7 -8- 2, ... ± 3σ windows drops off rapidly, as shown in Figure 3a. Instead of putting all variables at ± 3σ, we might prefer to find a ± kσ window such that the probability of falling outside remains constant...