The circuit described below was used for the U6 model, the U12 circuit was the same, using the equivalent power supply and voltage measurement terminals. The voltage was sourced from the output terminal of the DAC0 digital-to-analog converter and applied to the series circuit consisting of the DUT, a shunt resistor, and a ground terminal. The shunt resistor was a resistor of known value that was used to measure current in the circuit, as the LabJack had no built-in capacitance for such measurement. This was done by measuring the voltage across it using analog input AIN1, relative to ground. From this voltage, Ohm's law was then used to calculate the current. The voltage across the DUT was measured in the same way using AIN0 and AIN1. The voltage was reduced across each component as described by Kirchhoff's law of series circuits. It was established during the first quarter that to draw the maximum possible voltage across the device under test, it was necessary to make the shunt resistance as low as possible. However, too large a variation between the two resistances resulted in a reduction in voltage resolution. Conversely, increasing the shunt resistance to a value equivalent to or greater than that of the device under test increases voltage resolution, but at the cost of decreasing the maximum voltage that could drop across the DUT. Additionally, a problem that mainly arose with the U12 model was that, due to the lower input impedance, too much decrease in the total series resistance of the circuit (this problem was first encountered when using a 1 Ω shunt and measuring an 11 Ω DUT) results in a decrease in the possible current resolution of the installation below the size of the increments being passed through the circuit. These effects could be compensated for...... middle of paper ...... the manufacturer), using a 10KΩ shunt resistor taken at room temperature. Figure 8- 1.8KΩ resistance I(V) Characteristic using a 10 KΩ shunt resistor taken at room temperature. The gradient of this plot gives: via Ohm's law, an average resistance of 1.75 KΩ, well within the manufacturer's tolerance and within 3% of the 1,802 ± 0.005 Ω measured using a multimeter professional. It should be noted, however, that although the average resistance value matched the measured values ​​well, the initial data points during the scan give a deviation from this average of up to 40% and a long scan is therefore necessary. for this characteristic, even linear. resistances. The voltage drop across the device under test was largely determined by the relative resistances in the circuit, and the functions described in sections 3.1 and 3.2 are therefore an integral part of this calculation..