10.06.2016 Views

eldo_user

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

STMicroelectronics Models<br />

What Does Eldo-ST Mode Change?<br />

Gxy<br />

Cxy<br />

Isub<br />

Derivative of static current on node x with respect to Vy; x and y<br />

can be one of D, G, S, B.<br />

Derivative of charge on node x with respect to Vy; x and y can<br />

be one of D, G, S, B.<br />

Subthreshold current component.<br />

As shown in Table E-1, with the -st argument or STVER option set and optyp not set or not 2,<br />

then Eldo reports multiple Gxy terms, where Gxy stands for derivative of current on pin x with<br />

respect to voltage on pin y. For example, Gds is the derivative of the current on the Drain with<br />

respect to the voltage on the Source. In all other cases, just three conductances values are<br />

reported:<br />

• GM is the derivative of IDS with respect to VGS.<br />

• GDS is the derivative of IDS with respect to VDS.<br />

• GMBS is the derivative of IDS with respect to VBS.<br />

In the OP table for BSIM3v3, Eldo also displays VBI and PHI:<br />

PHI<br />

VBI<br />

Surface potential at strong inversion.<br />

Built-in voltage for the PN junction between the substrate and<br />

the source.<br />

Table E-2. Operating Point—optyp values—Dynamic Part for Charge Control<br />

Model<br />

optyp=1<br />

(Default)<br />

optyp=3<br />

When -st argument or<br />

STVER option is set<br />

Cdd Cddb Cdd<br />

Cdg Cdgb Cdg<br />

Cds Cdsb Cds<br />

Cdb Cdb Cdb+CJDB<br />

Cgd Cgdb Cgd Cgd+CVGD<br />

Cgg Cggb Cgg<br />

Cgs Cgsb Cgs Cgs+CVGS<br />

Cgb Cgb Cgb+CVGB<br />

Csd<br />

Csd<br />

Csg<br />

Csg<br />

When -st argument or<br />

STVER option is set and<br />

optyp=2<br />

1480<br />

Eldo® User's Manual, 15.3

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!