Title :
An improved Z-parameter macro model for substrate noise coupling
Author :
Xu, Chenggang ; Fiez, Terri ; Mayaram, Karti
Author_Institution :
Sch. of EECS, Oregon State Univ., Corvallis, OR, USA
Abstract :
A new formulation of Z-parameter based macro models for substrate noise coupling is presented. With this new formulation, the variation of the self Z-parameter at small contact separations can be simulated. Instead of calculating the Z-parameters directly by two-contact models, the Z-parameters are calculated as a least-square solution to an overdetermined set of equations. In this way, the interaction between neighboring contacts can be easily accounted for in the Z-parameter calculation. The method can be applied to both the lightly and the heavily doped substrates. Examples for a lightly doped substrate are provided.
Keywords :
integrated circuit modelling; integrated circuit noise; least squares approximations; mixed analogue-digital integrated circuits; Z-parameter macromodel; contact separations; heavily doped substrates; least-square solution; lightly doped substrates; neighboring contacts; substrate noise coupling; Contact resistance; Coupling circuits; Curve fitting; Digital circuits; Electronic mail; Equations; Geometry; Numerical simulation; Solid modeling;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1329487
