The CMOS inverter shown below has Vdd=1.8 V and is fabricated
The CMOS inverter shown below has Vpp = 1.8 V and is fabricated in a 0.18 um process for which Mn = 4Mp, Mn Cox = 400 A/V2, Vtn = - Vtp = 0.4 V. For this problem, neglect channel-length modulation effects. Both Qy and Qp use the minimum channel length allowed by the process. For On, (W/L)n = 1.5. VODOM doo lp OVO ON stor tools s ) (15) (4 points) What must be the dimension (W/L) of Qp for the inverter to switch at v, = 0.9 V? (a) 0.8 um/0.18 pm (b) 1.08 pm/0.18 um o sobie m y (c) 1.6 pm/0.36 pm og modelad mo (d) 2.16 um/0.36 um (e) none of the above 10 o ch iw oldat dit ) 32 (16) (4 points) What are the noise margins of the inverter? o o o oli vhod id) (a) NMy = 1.8 V, NM = 0 V form) (b) My = 0.9 V, NM = 0.9 V (c) NM = 0.775 V, NM = 0.775 V y o 20M vse wmd) (d) NM = 1.8 V, NM = 0.9 V ol hours to timidus olbY TOV (e) none of the above (17) (4 points) At the switching point, what is the current that flows in en and Qp? (a) 0 (b) 75 A (c) 100 MA (d) 125 A (e) none of the above (18) (4 points) For v, = 1.8 V, what is the maximum current that Qn can sink while vo is limited 0.4 V? (a) 0 (6) 0.288 mA (c) 0.567 mA (d) 0.758 mA (e) none of the above (19) (4 points) Using the empirical approach, what is the maximum value of the capacitance that can be driven at the output of this inverter to ensure a switching speed of at most 100 ps? (a) 5.6fF (b) 10.9 fF (c) 15.2 fF (d) 20.8 F (e) none of the above The CMOS inverter shown below has Vpp = 1.8 V and is fabricated in a 0.18 um process for which Mn = 4Mp, Mn Cox = 400 A/V2, Vtn = - Vtp = 0.4 V. For this problem, neglect channel-length modulation effects. Both Qy and Qp use the minimum channel length allowed by the process. For On, (W/L)n = 1.5. VODOM doo lp OVO ON stor tools s ) (15) (4 points) What must be the dimension (W/L) of Qp for the inverter to switch at v, = 0.9 V? (a) 0.8 um/0.18 pm (b) 1.08 pm/0.18 um o sobie m y (c) 1.6 pm/0.36 pm og modelad mo (d) 2.16 um/0.36 um (e) none of the above 10 o ch iw oldat dit ) 32 (16) (4 points) What are the noise margins of the inverter? o o o oli vhod id) (a) NMy = 1.8 V, NM = 0 V form) (b) My = 0.9 V, NM = 0.9 V (c) NM = 0.775 V, NM = 0.775 V y o 20M vse wmd) (d) NM = 1.8 V, NM = 0.9 V ol hours to timidus olbY TOV (e) none of the above (17) (4 points) At the switching point, what is the current that flows in en and Qp? (a) 0 (b) 75 A (c) 100 MA (d) 125 A (e) none of the above (18) (4 points) For v, = 1.8 V, what is the maximum current that Qn can sink while vo is limited 0.4 V? (a) 0 (6) 0.288 mA (c) 0.567 mA (d) 0.758 mA (e) none of the above (19) (4 points) Using the empirical approach, what is the maximum value of the capacitance that can be driven at the output of this inverter to ensure a switching speed of at most 100 ps? (a) 5.6fF (b) 10.9 fF (c) 15.2 fF (d) 20.8 F (e) none of the above
