Design the following circuits before coming to the Lab. Design means draw the circuit diagram and show all element values. Constant Current Source: Design a circuit that will generate a \"constant\" DC current, of approximately the same as the IDSS of your JFET, into a varying load from 50 Ohm to 5 kOhm. The supply voltage to this circuit is held constant at 16 volts DC. Use a DC analog ammeter to measure the current. Repeat with VDD = 32 V. Solution.