Modeling and Design of a Nano Scale CMOS Inverter for Symmetric Switching Characteristics

Table 8

Comparison between PSO results and SPICE results—𝜏_PHL and 𝜏_PLH.

Case study	PSO results			SPICE results
	𝜏PHL(ns)	𝜏PLH(ns)	Difference (ns)	𝜏𝑅(PHL)	𝜏𝐹(LH)	Difference (ns)
1	2.5227	2.4648	0.0579	2.6455	2.4367	0.2088
2	4.8217	4.8025	0.0192	4.9417	4.9256	0.0161
3	2.6854	2.6731	0.0123	2.8366	2.4292	0.4074
4	2.5812	2.5637	0.0175	2.5157	2.4210	0.0947
5	4.6977	4.6785	0.0192	4.7861	4.5264	0.2597
6	2.5805	2.5332	0.0473	2.5771	2.4957	0.0814
7	2.7219	2.7581	0.0362	2.8629	2.6367	0.2262