1. I think the order of cox is wrong: in SI units this should be 8.4*10^-3 [F/m2]
2. The last contribution in the denominator of the Zin(s) equation is cgd1 , whereas in your MATLAB equation you have cgs1
(but I'm not sure if this changes a lot).
1. I think the order of cox is wrong: in SI units this should be 8.4*10^-3 [F/m2]
2. The last contribution in the denominator of the Zin(s) equation is cgd1 , whereas in your MATLAB equation you have cgs1
(but I'm not sure if this changes a lot).
I used Zin in ADS , and I have tried to calculate the resistance only circuit, the result is ok.
I am now wondering if I have correct Cgs.
I got Cgso, Cox from mosis. Is it believable?
Yes, these values seem reasonable. The Cox value is right for a 180nm process.
However, the MATLAB result value is much more similar to an output impedance: Re(Z)=0.1mΩ , seems too low even for an output resistance. ABS(Z)=139mΩ also seems quite low.
Well... Actually, i don't know how ADS calculates Zin. But i take it as the exact Zin of the circuit, and compare it with my formula(i also take it as the exact Zin).
Yes, these values seem reasonable. The Cox value is right for a 180nm process.
However, the MATLAB result value is much more similar to an output impedance: Re(Z)=0.1mΩ , seems too low even for an output resistance. ABS(Z)=139mΩ also seems quite low.