3-30
Agilent 4155B/4156B VXIplug&play Driver User’s Guide, Edition 4
Programming Examples Using HP VEE
Pulsed Spot Measurements
Pulsed Spot Measurements
To make pulsed spot measurements, use the following functions.
Table 3-14
Functions for Pulsed Spot Measurements
A program example is shown in Figure 3-26 on page 3-31. This program measures
MOSFET drain current. The measurement setup is shown in Figure 3-25.
Figure 3-25
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 (pulse channel must be set to OFF)
Integration Time Setup
hp4156b_setInteg
table,time,average
Forces dc bias
hp4156b_force
channel,mode,range,value,compliance,polarity
Forces pulse bias
hp4156b_setPbias
channel,mode,range,base,peak,width,period,
hold,compliance
Executes measurement
hp4156b_measureP
channel,mode,range,value,status
Disables output
hp4156b_zeroOutput
channel
A
Drain
Substrate
Gate
Source
channel: SMU2
mode: V pulse
range: 20V
base: 0V
peak: Vd
width: 10msec
period: 20msec
hold: 0sec
comp: 0.1A
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
value: Id
range: 0.1A
status: status
