A simplified model to predict the linear temperature coefficient of a CMOS inverter´s delay time

The Curve-fitting equation A/(1 + BT) is used in this study of the temperature dependence of a MOSFET´s drain current. This leads to a simplified delay-time model in predicting the temperature coefficient of delay-time for a CMOS circuit. Good agreement is obtained between the measured CMOS ring-oscillator delay time and the simplified model. Both the experimental and computer-simulated data suggest that the half-supply point can be used to estimate the temperature coefficient of CMOS delay time.