ECE 520 - VLSI Design (spring 2024) 1. Due in class: Thursday April 11, 2024 Homework #8 The following is the layout of an inverter with dimensions. Assume that VDD=2.5V, K'n=100uA/V², Vtn=0.4V, K'p=60uA/V², Vtp=-0.5V, tox=12nm, εox=3.9, Xd=42nm (overlap distance under the gate), C=0.74fF/um², Cjsw=0.43fF/um for both NMOS and PMOS devices at zero bias. a. Estimate the effective input capacitance of the inverter, Cin. b. Estimate the effective output capacitance of the inverter, Cout. For simplicity find effective Cout at zero bias. c. If the output of this inverter is connected to a similar inverter, estimate the tpHL and tpLH. Ignore the wire parasitic capacitance. GND A (input) 0.6um 0.6um Z (output) 0.5um ←>> 0.25um VDD 0.5um 0.25um

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ECE 520 - VLSI Design (spring 2024)
1.
Due in class: Thursday April 11, 2024
Homework #8
The following is the layout of an inverter with dimensions. Assume that VDD=2.5V,
K'n=100uA/V², Vtn=0.4V, K'p=60uA/V², Vtp=-0.5V, tox=12nm, εox=3.9, Xd=42nm
(overlap distance under the gate), C=0.74fF/um², Cjsw=0.43fF/um for both NMOS
and PMOS devices at zero bias.
a. Estimate the effective input capacitance of the inverter, Cin.
b. Estimate the effective output capacitance of the inverter, Cout. For simplicity find
effective Cout at zero bias.
c. If the output of this inverter is connected to a similar inverter, estimate the tpHL
and tpLH. Ignore the wire parasitic capacitance.
GND
A (input)
0.6um 0.6um
Z (output)
0.5um
←>>
0.25um
VDD
0.5um
0.25um
Transcribed Image Text:ECE 520 - VLSI Design (spring 2024) 1. Due in class: Thursday April 11, 2024 Homework #8 The following is the layout of an inverter with dimensions. Assume that VDD=2.5V, K'n=100uA/V², Vtn=0.4V, K'p=60uA/V², Vtp=-0.5V, tox=12nm, εox=3.9, Xd=42nm (overlap distance under the gate), C=0.74fF/um², Cjsw=0.43fF/um for both NMOS and PMOS devices at zero bias. a. Estimate the effective input capacitance of the inverter, Cin. b. Estimate the effective output capacitance of the inverter, Cout. For simplicity find effective Cout at zero bias. c. If the output of this inverter is connected to a similar inverter, estimate the tpHL and tpLH. Ignore the wire parasitic capacitance. GND A (input) 0.6um 0.6um Z (output) 0.5um ←>> 0.25um VDD 0.5um 0.25um
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