Question

Design an n-channel Silicon JFET with a Pinch off voltage of -20 V with following constraints: Gate width = 0.1 cm Use only Phosphorous or Born dopants Physical design parameters must

be reasonable and feasible for JFET fabrication Hand Calculations: a) Must tabulate all parameters obtained, the device geometry as well as any other unknown parameters such as the channel thickness, channel length, doping densities, carriers' mobility, built-in potential, and turn off voltage (VT). b) Calculate substrate's resistance used. c) Calculate IDsat and VDsat for VG at 0 V, -5 V, -10 V, -15 V, must tabulate. ORCAD: d) Submit Library file for JFET e) Examine (hand-calculated) VT from part (a) f) Examine results in part (c) show both hand calculations and ORCAD on graph

Fig: 1