Keithley Series 2600 User Manual

A-54
APPENDIX A
Scripts
errorqueue.clear() --Clear the error queue
smua.measure.nplc = l_nplc --Measurement integration rate
smub.measure.nplc = l_nplc --Measurement integration rate
smua.source.func = smua.OUTPUT_DCVOLTS
smua.source.autorangev = smua.AUTORANGE_ON --Enable source autorange
smua.source.limiti = (100 * l_target_id) --Set compliance value
smua.measure.autorangev = smua.AUTORANGE_ON --Enable measure autorange
smub.source.func = smub.OUTPUT_DCVOLTS
smub.source.autorangev = smub.AUTORANGE_ON --Enable source autorange
smub.source.limiti = l_high_vgs
smub.source.limitv = 6
smub.measure.autorangev = smub.AUTORANGE_ON --Enable measure autorange
--Start test
smua.source.levelv = l_vds_source --Set source level
smub.source.levelv = 0 --Set source level
smua.source.output = smua.OUTPUT_ON --Enable output
smub.source.output = smub.OUTPUT_ON --Enable output
delay(0.001) --Delay
l_comp_val = Check_Comp() --check compliance
if l_comp_val == true then --If unit is in compliance, end
smua.source.output = smua.OUTPUT_OFF --Disable output
smub.source.output = smub.OUTPUT_OFF --Disable output
smua.source.levelv = 0 --Return source to 0
smub.source.levelv = 0 --Return source to 0
else
--Search for the right base current
l_k = 0
repeat --Repeat search until measured Ic is within 5% of target, or iteration
maximum reached, or compliance.
l_k = l_k + 1 --Increment
l_vgs_source = ((l_high_vgs-l_low_vgs)/2) + l_low_vgs --Determine source
value (Binary Search)
smub.source.levelv = l_vgs_source --Program new source value
delay(0.01) --Source delay

Keithley Series 2600 Specifications

General

Model	Series 2600
Measurement Functions	Voltage, Current, Resistance, Power
Resolution	Up to 6.5 digits
Current Source Range	Up to 10A
Communication Interfaces	GPIB, USB
Applications	Semiconductor testing
Category	Source Measure Unit (SMU)
Channels	Single or Dual Channel (varies by model)