Agilent Technologies B1500A User's Guide download pdf (Page 195)

Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3 4-39

Programming Examples for C++ Users

Leakage Current Measurement

Table 4-13 explains an example subprogram that performs the quasi pulsed spot

measurement and displays the measurement result data (MOSFET drain current).

Table 4-13 Leakage Current Measurement Example

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

{

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

ViInt32 gate = 2; /* SMU2, gate */

ViInt32 source = 4; /* SMU4, source */

ViInt32 bulk = 6; /* SMU6, bulk */

ViReal64 vd = 5;

ViReal64 vg = 0;

ViReal64 idcomp = 0.05;

ViReal64 igcomp = 0.01;

ViReal64 start = -5;

ViReal64 hold = 0.1;

ViReal64 delay = 0.001;

ViReal64 meas;

ViInt32 status; /* 16 */

ret = agb1500_setSwitch(vi, drain, 1); /* 18 */

ret = agb1500_setSwitch(vi, gate, 1);

ret = agb1500_setSwitch(vi, source, 1);

ret = agb1500_setSwitch(vi, bulk, 1);

check_err (vi, ret); /* 22 */

ret = agb1500_force(vi, bulk, agb1500_VF_MODE, 0, 0, 0.1, 0);

ret = agb1500_force(vi, source, agb1500_VF_MODE, 0, 0, 0.1, 0);

ret = agb1500_force(vi, gate, agb1500_VF_MODE, 0, vg, igcomp,

0);

check_err (vi, ret); /* 27 */

Line Description

1 Beginning of the perform_meas subprogram.

4 to 16 Declares variables, and defines the value.

18 to 21 Enables measurement channels.

24 to 26 Applies voltage to device.

22 and 27 Calls the check_err subprogram (shown in Table 4-1) to check if

an error status is returned for the previous line.

1 2 ... 190 191 192 193 194 195 196 197 198 199 200 ... 207 208

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Agilent Technologies B1500A User's Guide Page 195