Week 5

In week 5, we studied the voltage transfer curves of organic enhancement-load inverter of different aspect ratios. The organic devices apply different current equations from silicon devices. The supervisor gives us the equations as:

(non-saturaion)

and

(saturation)

Thus we derived the MATLAB code:

 and the final voltage transfer curves:

The shape of curves are similar to those we studied in week 4. The highest output voltage is also VDD minus threshold voltage of load transistor and the lowest output voltage is determined by the aspect ratio of load and driver transistor. The slope of linear region is decided by the aspect ratio of lead and driver. The voltage drops sharp when large aspect ratio of driver is applied.