3-22
Agilent 4155B/4156B VXIplug&play Driver User’s Guide, Edition 4
Programming Examples Using HP VEE
Staircase Sweep Measurements
Staircase Sweep Measurements
To make staircase sweep measurements, use the following functions.
Table 3-6
Functions for Staircase Sweep Measurements
A program example is shown in Figure 3-18 on page 3-23. This program measures
MOSFET Id-Vd characteristics. The measurement setup is shown in Figure 3-17.
Figure 3-17
Device Connection and Source Setup for Example Program
Description
Function
Parameters
Output Switch Setup
hp4156b_setSwitch
channel,state
Output Filter Setup
hp4156b_setFilter
channel,state
Integration Time Setup
hp4156b_setInteg
table,time,average
Forces dc bias
hp4156b_force
channel,mode,range,value,compliance,polarity
Sweep Source Setup
hp4156b_setIv
channel,mode,range,start,stop,point,hold,delay,
s_delay,comp,p_comp
Executes measurement
hp4156b_sweepIv
channel,mode,range,point,source[ ],value[ ],
status[ ]
Disables output
hp4156b_zeroOutput
channel
A
Drain
Substrate
Gate
Source
channel: SMU2
mode: V output
range: 20V
start: VdStart
stop: VdStop
point: MeasPoint
hold: 0sec
delay: 0sec
s_delay: 0sec
comp: 0.1A
p_comp: 0.5W
channel: SMU4
mode: V output
value: Vsub
range: 2V
comp: 0.1A
polarity: AUTO
channel: SMU3
mode: V output
value: Vg
range: 20V
comp: 10mA
polarity: AUTO
channel: SMU1
mode: V output
value: Vs
range: 2V
comp: 0.1A
polarity: AUTO
channel: SMU2
mode: I measure
range: 0.1A
point: MeasPoint
source: Vd
value: Id
status: status
