S530/S540 KTE Linear Parametric Test Library (LPTLib) User's Manual Section 3:
S530-900-01 Rev. E / September 2017 3-73
For example, assume the minimum and maximum values of the source range are from 0 V to 20 V,
and the number of iterations is 16. The 20 V level automatically initiates a source-measure unit (SMU)
20 V source range. As a result, the resolution of the final source voltage returned is:
Example
double ssbiasv, vgs1, vds1;
.
conpin(SMU1, 1, 0);
conpin(SMU2, 2, 0);
conpin(SMU3, 3, 0);
conpin(GND, 4, 0);
trigig(SMU2, +l.0E-6); /* Set trigger point for 1 uA. */
forcev(SMU3, ssbiasv); /* Apply a substrate bias */
/* voltage ssbiasv. */
forcev(SMU2, vds1); /* Apply a drain voltage of */
/* vds1. */
searchv(SMU1, 0.6, 1.7, 8, 1.0E-3, &vgs1); /* Set */
/* for 8 steps from 0.6 to */
/* 1.7 V at 1 ms.*/
/* per iteration; return the */
This example searches for the gate voltage required to generate a drain current of 1 µA. Eight separate
gate voltages within the range of 0.6 V through 1.7 V are specified by the searchv command. After the
eight iterations complete, the drain current is close to 1 µA, and the searchv operation is terminated. The
gate voltage generated at this time by SMU1 is returned in the variable vgs1.
Equation 10: Gate voltage requirement
Also see
None
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