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https://designers-guide.org/forum/YaBB.pl Simulators >> Circuit Simulators >> question about noise parameter gamma simulation https://designers-guide.org/forum/YaBB.pl?num=1297789638 Message started by yishuihan on Feb 15th, 2011, 9:07am |
Title: question about noise parameter gamma simulation Post by yishuihan on Feb 15th, 2011, 9:07am Hi guys: anybody has that problem when doing the noise simulation for the equivalent gamma, the value you get is smaller than 2/3? my value is 0.4~0.6 (UMC 130nm technology, PMOS). this is a very strange value, right? it should not be less than 2/3, because it is the ideal value. i do not know whether there are some errors of my testbench. my circuit set up is like this: L=360nm,Vdd=1.2, Vgs=0.6 (DC source), Iprobe is used at the drain. after doing the noise simulation, i use the noise density @20MHz, devided by 4KTgm. who can figure out where is the problem? or the noise model (BSIM3V3.2.4)used in this technology is not accurate? thanks in advance |
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