MIT6_012s09_pset04

MIT6_012s09_pset04 - LEVEL=1 VT0=0.5 TOX=1.5e-8 U0=220...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
MIT OpenCourseWare http://ocw.mit.edu 6.012 Microelectronic Devices and Circuits Spring 2009 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms .
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
_____________________________________________________________ Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science 6.012 Microelectronic Devices and Circuits Homework #4 Problem 1 Consider the CMOS inverter pictured below. Take channel length modulation into account. Parameter NMOS PMOS V TO 0.5 V -0.5 V µ 220 cm 2 /Vs 110 cm 2 /Vs λ 0.1 V -1 0.1 V -1 T ox 15 nm 15 nm • Dimensions of W and L are in μm a) Calculate V M , the voltage midpoint. b) Calculate A V , the voltage gain at V IN =V M . c) Calculate N ML and N MH , the noise margin low and noise margin high. d) Calculate t PHL and t PLH , the propagation delay from high-to-low and propagation delay from low-to-high.
Background image of page 2
Problem 2 We will now use the following SPICE model and compare our hand calculations from Problem 1 with simulated results. .MODEL N15 NMOS
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: LEVEL=1 VT0=0.5 TOX=1.5e-8 U0=220 LAMBDA=1.0e-1 +GAMMA=0.6 CJ=1e-4 CJSW=5e-10 PB=0.95 .MODEL P15 PMOS LEVEL=1 VT0=-0.5 TOX=1.5e-8 U0=110 LAMBDA=1.0e-1 +GAMMA=0.6 CJ=3e-4 CJSW=3.5e-10 PB=0.9 a) Use the DC sweep on the input voltage to simulate transfer characteristics using SPICE. Compare V M , A V , N ML , N MH , with the calculated results. b) Use the Pulse input to simulate an input waveform shown below using SPICE. Compare t PHL and t PLH with your hand calculations. Problem 3 Consider the circuit below, which consists of an NMOS device and PMOS current source load. a) Calculate the width of the PMOS device so its saturation current is 50A. b) Calculate V M , V OH , V OL . Remember, for hand calculations we assume V OH =V MAX , and V OL =V MIN . c) Calculate the voltage gain of this circuit, when V IN =V M . d) Calculate V OUT when V IN =3....
View Full Document

Page1 / 4

MIT6_012s09_pset04 - LEVEL=1 VT0=0.5 TOX=1.5e-8 U0=220...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online