Each AMOLED pixel typically requires a control circuit with two transistors: one to turn the OLED on and off, and the other acting as a constant-current source
to control the brightness.
Figure 2 shows the resistance standard and the thermistor probes connected in series with the constant-current source.
A constant-current source supplies a 10 [micro]A current to all of the channels of the junction box in series.
He has been working as a microwave design engineer for over 10 years and holds a patent on the use of a GaAs FET constant-current source
for biasing RF GaAs FETS.