16.49 Consider a four-input CMOS NOR logic gate. Determine the W/L ratios of the transistors to provide for symmetrical switching based on the CMOS inverter design with (W/L)n = 2 and (W/L)p = 4. (b) If the load capacitance of the NOR gate doubles, determine the required W/L ratios to provide the same switching speed as the logic gate in part (a). 16.50 Repeat Problem 16.49 for a four-input CMOS NAND logic gate. 16.51 Repeat Problem 16.49 for a three-input CMOS NOR logic gate. 16.52 Repeat Problem 16.49 for a three-input CMOS NAND logic gate.
Figure P16.53 shows a classic CMOS logic circuit. (a) What is the logic function performed by the circuit? (b) Design the NMOS network. (c) Determine the transistor W/L ratios to provide symmetrical switching times at twice the switching speed of the basic CMOS inverter with (W/L)n = 2 and (W/L)p = 4.
Figure P16.54 is a classic CMOS logic gate. (a) What is the logic function performed by the circuit? (b) Design the PMOS network. (c) Determine the transistor W/L ratios to provide symmetrical switching times at twice the switching speed as the basic CMOS inverter with (W/L)n = 2 and (W/L)p = 4.
Figure P16.55 is a classic CMOS logic gate. (a) What is the logic function performed by the circuit? (b) Design the NMOS network. (c) Determine the transistor W/L ratios to provide symmetrical switching times equal to the basic CMOS inverter with (W/L)n = 2 and (W/L)p = 4.
Consider the classic CMOS logic circuit in Figure P16.56. (a) What is the logic function performed by the circuit? (b) Design the PMOS network. (c) Determine the transistor W/L ratios to provide symmetrical switching times equal to the basic CMOS inverter with (W/L)n = 2 and (W/L)p = 4.
(a) Given inputs A, B, C, A
D16.58 (a) Given inputs A, B, C, D, and E, design a CMOS circuit to implement the logic function Y
(a) Determine the logic function performed by the circuit in Figure P16.59. (b) Determine the W/L ratios to provide symmetrical switching times equal to the basic CMOS inverter with (W/L)n = 2 and (W/L)p = 4.
(a) Consider a five-input CMOS NOR logic gate. Design the W/L ratios of the transistors to provide symmetrical switching times equal to the basic CMOS inverter with (W/L)n = 2 and (W/L)p = 4. (b) Repeat part (a) for a five-input CMOS NAND logic gate.
Q6a. Find the width-to-length ratios of the transistors in the CMOS logic circuit that implements the logic function f(A,B,C) = B+AC. Symmetrical switching times are desired and the switching times should correspond to the basic CMOS inverter.
HW: (a) Design a CMOS logic circuit that implements the logic function. f(A,B,C) = A + BC (b) Find the width-to-length ratios of the transistors in the CMOS logic circuit designed in (a). Symmetrical switching times are desired and the switching times should correspond to the basic CMOS inverter.
Ex 16.10: Determine the transistor sizes of a 3-input CMOS NOR logic gate. Symmetrical switching times are desired and the switching times should correspond to the basic CMOS inverter. (Ans. Wp = 6W , Wn = W )
Ex 16.11: Design the width-to-length ratios of the transistors in the static CMOS logic circuit of Figure 16.40. Symmetrical switching times are desired and the switching times should correspond to the basic CMOS inverter. (Ans. All NMOS devices, Wn = 2W ; Wp(MPA) = Wp(MPB) = Wp(MPC) = 4W ; Wp(MPD) = Wp(MPE) = 8W )
For the MOSFET bias circuit shown, what is the drain voltage, Vd, in Volts? Assume that the transistor is in the saturation region, and use: Vdd = 7 V, Vss = -9 V, Vg = -1.9 V, Rd = 4.7 kohm, Rs = 7.8 kohm, Vt = 0.4 V, and Von = 0.30. (Remember that Von = Vov = Vgs - Vt ) Neglect the effect of channel-length modulation and body effect.
Q2. A MOSFET circuit is shown in Fig 2a. Fig. 2 b is the characteristic of the MOSFET. (36%) Fig. 2a Fig. 2b (a) State the full name for the MOSFET. (b) What is the value the voltage VGs ? (c) What is the value of IG ? (d) What is the value of loss? (e) Determine VDS. (f) What is the value of the cutoff voltage VGS (off)? (g) Calculate VDS at VGS = -2V, -5V and -8V.