Optimizing

The steps below represent the basic maxiset optimization sequence.

1	Linear Ids - Vgs data

V_sb=0V: Optimize VTOR, SLVTO, SL2VTO, SWVTO, BETSQ, THE1R, SLTHE1R, and SWTHE1.

Varying V_sb: Optimize KOR, SLKO, SWKO, (KR, SLK, SWK, VSBXR, SLVSBX, SWVSBX), THE2R, SLTHE2R, and SWTHE2.

2	Subthreshold Ids - Vgs data

V_sb = 0V: Optimize GAMOOR, SLGAMOO, MOR, SLMO, ZET1R, and SLZET1.

3	Saturation gds - Vds data

V_sb = 0V: Optimize GAM1R, SLGAM1, SWGAM1, ALPR, SLALP, SWALP, and VPR.

4	Saturation Ids - Vds data

V_sb = 0V: Optimize THE3R, SLTHE3R, and SWTHE3.

5	Substrate current (Isub - Vgs) data

V_sb = 0V: Optimize A1R, SLA1, SWA1, A2R, SLA2, SWA2, A3R, SLA3, and SWA3.

6	Subthreshold Ids - Vgs data

Varying V_sb: Optimize VSBTR and SLVSBT.

Optimization Transforms and Macros

The transforms described in this section are available with the DUT extract.

full_extract

The full_extract transform controls the optimization sequence for miniset extraction. It can be found under the setup single_ext.

1	Initialize parameters (par_init)

2	Linear region fitting at Vbs = 0 (lin_opt1)

3	Linear region fitting at all Vbs (lin_opt2 for 2 k-factor model) or (lin_opt3 for 1 k-factor model)

4	Subthreshold fitting at Vbs = 0 (subvt_opt1)

5	Gds fitting at Vbs = 0 (normal_gds_opt1 for most devices) or (large_gds_opt1 for the large device)

6	Ids fitting for Vbs = 0 (ids_opt1)

7	Avalanche fitting for Vbs = 0 (isub_opt1)

8	Repeat steps 2 through 7

9	Subthreshold fitting for all Vbs (subvt_opt2)

sca_opt

The sca_opt transform controls the optimization sequence for maxiset extraction. It can be found under the setup scaled_ext.

1	Linear region fitting at Vbs = 0 (sca_lin_opt1)

2	Linear region fitting for all Vbs (sca_lin_opt2 for the 2 k-factor option) or (sca_lin_opt3 for the 1 k-factor option)

3	Subthreshold fitting at Vbs = 0 (sca_subvt_opt1)

4	Gds fitting at Vbs = 0 (sca_gds_opt1)

5	Ids fitting at Vbs = 0 (sca_ids_opt1)

6	Avalanche current fitting at Vbs = 0 (sca_isub_opt1)

7	Subthreshold fitting for all Vbs (sca_subvt_opt2)

single_temp_opt

The single_temp_opt transform controls the optimization sequence for the temperature-dependent parameters at a single non-nominal temperature. It can be found under the setup single_temp_extract.

1	Initialize variables (temp_par_init)

2	Linear fitting at Vbs = 0 (single_temp_lin_opt1)

3	Linear fitting at all Vbs (single_tep_lin_opt2)

4	Subthreshold fitting at Vbs = 0 (single_temp_subvt_opt1)

5	Ids fitting at Vbs = 0 (single_temp_ids_opt1)

6	Avalanche current fitting at Vbs = 0 (single_temp_isub_opt1)

optimize_temperature_coefficients

The optimize_temperature_coefficients macro controls the optimization sequence for the temperature coefficients by calling the transforms listed below (found under the all_temp_extract setup) in the order shown.

1	all_temp_lin_opt1

2	all_temp_lin_opt2

3	all_temp_subvt_opt1

4	all_temp_ids_opt1

5	all_temp_isub_opt1