Agilent Technologies B1500A Guia do Utilizador descarregar pdf (Página 109)

Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3 3-15

Programming Examples for Visual Basic Users

Pulsed Spot Measurement

Sub spot_meas(vi As Long, ret As Long, pins() As Long) ’1

Dim vd As Double ’3

Dim vg As Double

Dim idcomp As Double

Dim igcomp As Double

Dim meas As Double

Dim status As Long

vd = 0.5

idcomp = 0.05

vg = 0.5

igcomp = 0.01 ’12

Dim base As Double ’14

Dim width As Double

Dim period As Double

Dim hold As Double

base = 0

width = 0.001

period = 0.01

hold = 0.1 ’21

ret = agb1500_setFilter(vi, pins(1), agb1500_FLAG_OFF) ’23

ret = agb1500_setPbias(vi, pins(1), agb1500_VF_MODE, 2, base,

vg, width, period, hold, igcomp)

ret = agb1500_force(vi, pins(3), agb1500_VF_MODE, 0, 0, 0.05, 0)

ret = agb1500_force(vi, pins(2), agb1500_VF_MODE, 0, 0, 0.05, 0)

ret = agb1500_force(vi, pins(0), agb1500_VF_MODE, 2, vd, idcomp,

check_err vi, ret ’29

Line Description

1 Beginning of the spot_meas subprogram.

3 to 12 Declares variables for the dc sources, and defines the value.

14 to 21 Declares variables for the pulsed source, and defines the value.

23 to 24 Sets SMU filter off for the pulsed bias channel, and sets the

pulsed bias source.

25 to 27 Applies voltage to device.

29 Calls the check_err subprogram (shown in Table 3-1) to check if

an error status is returned for the previous line.

1 2 ... 104 105 106 107 108 109 110 111 112 113 114 ... 207 208

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Agilent Technologies B1500A Guia do Utilizador Página 109