Agilent Technologies B1500A User's Guide download pdf (Page 193)

Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3 4-37

Programming Examples for C++ Users

Breakdown Voltage Measurement

Table 4-12 explains an example subprogram that performs the quasi pulsed spot

measurement and displays the measurement result data (bipolar transistor

breakdown voltage).

Table 4-12 Breakdown Voltage Measurement Example

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

{

ViInt32 emitter = 1; /* SMU1 */

/*ViInt32 base; open */

ViInt32 collector = 4; /* SMU4 */

ViReal64 start = 0;

ViReal64 vc = 100; /* intlk cable must be connected */

ViReal64 iccomp = 0.005;

ViReal64 hold = 0;

ViReal64 delay = 0;

ViReal64 meas;

ViInt32 status; /* 13 */

ret = agb1500_setSwitch(vi, emitter, 1); /* 15 */

ret = agb1500_setSwitch(vi, collector, 1);

check_err (vi, ret); /* 17 */

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

check_err (vi, ret); /* 20 */

ret = agb1500_setBdv(vi, collector, 0, start, vc, iccomp, hold,

delay);

check_err (vi, ret); /* 23 */

Line Description

1 Beginning of the perform_meas subprogram.

4 to 13 Declares variables, and defines the value.

15 to 16 Enables measurement channels.

19 Applies voltage to device.

22 Sets the quasi pulsed voltage source.

17, 20, and

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

an error status is returned for the previous line.

1 2 ... 188 189 190 191 192 193 194 195 196 197 198 ... 207 208

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Agilent Technologies B1500A User's Guide Page 193