Problem:
The bias circuit of Figure is used in a design with VG = 5 V and RS = 2 kΩ . For a MOSFET with kn = 2 mA/V2, the source voltage was measured and found to be 2 V. What must Vt be for this device? If a device for which Vt is 0.5 V less is used, what does VS become? What bias current results?