Simple NFET characterisation with a Strix and a power supply

IV curves

Connection diagram

Wiring power supply ground to the Drive- connector

Code

#!/usr/bin/env python3
# Filename: measure-nfet-simple.py

import sys
import serial
import libStrix
import time

com = serial.Serial( sys.argv[1], 460800, timeout = 2.5 )

# Connect to Strix
smu = libStrix.Strix( com, 1 )

# Apply some averaging
smu.write( libStrix.PARAM_AVERAGES, 5 )

smu.enable_output( True )

VGS = [1 + 1.4*(j/49.0) for j in range( 0, 50 )]  # 50 points, 1..2.4V


for Vgate in VGS:
    
    smu.set_drive_voltage( Vgate )
    time.sleep(0.1) # small dwell time
    
    Ids = smu.measure_current()
    
    print( Vgate, Ids, file = sys.stderr )
    print( Vgate, Ids )
    
smu.enable_output( False )

# py measure-nfet-simple.py COMx > nfet-vgs_vs_ids.dat