Abstract

The effects of negative bias temperature instability (NBTI) on the performance of a CMOS inverter have been investigated by means of both simulation and experimental methods. The simulation of NBTI effects on CMOS inverter has been done by shifting the pFET V tho BSIM parameter. The results show that NBTI shifts the inverter transfer curve, reduces the low noise margin and current consumption but increases the high noise margin. A good agreement between simulation and experimental results has been obtained. Therefore, it can be assumed that the effect of NBTI on CMOS circuits can be mainly predicted by shifting the V tho pFET parameter.

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