Analog Electronics with LabVIEW®

P7.2. NMOS Common-Source Amplifier DC Evaluation

Procedure (Design) Start in the Mathcad file Project07.mcd to compute circuit component values as follows: We will design for a selected IDmax at Chan0_outmax = 10 V with VDSmin = 1V. Select your IDmax in the range 100 μA < IDmax < 500 μA. Make RG1 = RG2 ≈ 100 kΩ. Thus, the gate voltage is VG = Chan0_outmax/2. Select the circuit source resistor, RS, to satisfy VG = VGS (IDmax) + IDmaxRs. VGS (IDmax) can be calculated using previously measured parameters or obtained graphically from, for example, NMOSparam.vi from Project 4. After acquiring a real RS (which is close to the calculated value), calculate an actual, new IDmax using the same equation in reverse with the real RS. Neglect the change in V ...