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Agilent 4155C/4156C VXIplug&play Driver User’s Guide, Edition 4 5-11

Programming Examples for C++ Users

Staircase Sweep Measurements

This section explains an example subprogram that performs staircase sweep

measurement. The following subprogram performs I-V measurement and save the

measurement results (MOSFET Id-Vd characteristics) into a file.

Table 5-4 Staircase Sweep Measurement Example

void perform_meas (ViSession vi, ViStatus ret) /* 1 */

{

ViInt32 drain = 1; /* SMU1 */ /* 4 */

ViInt32 gate = 2; /* SMU2 */

ViInt32 source = 3; /* SMU3 */

ViInt32 bulk = 4; /* SMU4 */

ViReal64 vd = 3;

ViReal64 vg = 3;

ViReal64 idcomp = 0.05;

ViReal64 igcomp = 0.01;

ViReal64 hold = 0;

ViReal64 delay = 0;

ViReal64 s_delay = 0;

ViReal64 p_comp = 0;

ViInt32 nop1 = 11;

ViInt32 nop2 = 3;

ViInt32 rep;

ViReal64 sc[33];

ViReal64 md[33];

ViInt32 st[33];

ViReal64 dvg[3];

ViInt32 i = 0;

ViInt32 j;

ViInt32 n;

ViChar f_name[] = "C:\Agilent\data\data1.txt";

ViChar head1[] = "Vg (V), Vd (V), Id (mA), Status";

ViChar msg1[] = "Saving data...";

ViChar msg2[] = "Data save completed.";

ViChar c = ’\n’; /* 36 */

Line Description

1 Beginning of the perform_meas subprogram.

4 to 36 Declares variables, and defines the value.

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