The Model 930 is a programmable current source that provides
an output current that stays constant with changes in load
impedance. The output voltage will vary as necessary to
maintain the desired value of constant current through the
load. Output current of the Model 930 can be set by means of
an external potentiometer or by a DC voltage. It has an
internal regulator and reference circuit to make the output
current independent of power supply variations. Supply voltage
can be unregulated and can range from +12V to +32V. The
compliance voltage (maximum output voltage for highest load
impedance) is dependent on the supply voltage level and is
rated at the supply voltage less 5 Volts.