The MOSFET shown in Figure 4 is specified to have Vt=1 V and kn'(W/L)=1mA/V^2 . Assume lambda = 0. Use a power supply VDD =15 V. a) It is required to design the circuit of Figure 4 (by determining values of resistors) to establish a dc drain current ID=0.5 mA. b) Calculate the percentage change in the value of ID obtained when the MOSFET is replaced with another unit having the same kn'(W/L) but Vt=1.5 V.
For the MOS differential pair with a common-mode voltage VCM, applied, as shown in the figure, let VDD =VSS = 3V, kn'(W/L)=2mA/V^2, Vt = 0.5V, I = 0.6 mA, and RD = 2 kohm, and neglect channel-length modulation. Assume that the current source I requires a minimum voltage of 0.5 V to operate properly. What are the VOV and VGS values for each transistor? Show operations you do. Results written without operations won