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Introduction to CMOS Mixed Signal IC Design

Mixed Signal Circuit--both analog and digital

circuits are integrated on the same substrate. This class would focus on analog circuit design

and the interface circuit design between analog

and digital.

Course Prerequisites asic understanding of electronics

acti!e and "assi!e com"onents

asic CMOS integrated circuit technolog# $ee%&'() CMOS transistor "ro"erties

Modeling and characteristics

*abrication "rocedure

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Signal Circuits Co!ered in This Class

Analog Circuits ,nalog switch

Sam"le4hold

In!erter am"lifier

Differential ,m" O"erational ,m"

,nalog buffer

Com"arators

Mixed Circuits ,nalog4digital con!erters

Digital4analog con!erters

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6abs 6abs are an im"ortant "art of the course. 7ill use

Cadence C,D tools8 9irtuoso Schematic ,nalog Design:n!ironment $,D:).

:m"hasis will be circuit design4debugging8 so will use

Cadence Tools to

Ca"ture transistor le!el schematic :xtract netlist for simulating

Perform simulation

DC anal#sis"lot node res"onse $!oltage4current) while

swee"ing DC !oltage or other "arameters

Transient anal#sis"lot node res"onse as a function of time

,C anal#sis"lot node res"onse as function of frequenc#

$use linear model). Must be careful that transistors ha!e

"ro"er bias conditions to 0ee" lineari1ed model correct.

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Introduction &

7h# is ,nalog Signal Processing ;equired

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Introduction %

,DCs8 D,Cs8 and "re-4"ost- "rocessing analog circuits are

required to

interface the DSP core and the "h#sical world

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Introduction

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Introduction +(

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Introduction ++

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Introduction +5

Mixed-signal s#stem-on-a-chi"

integration

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7h# CMOS Mixed-Signal Integration

CMOS technologies ha!e the following ad!antages?

9er# large scale integration of both high densit# analog and digital circuits for low costand low "ower.

Ideal "ro"erties of MOS switches for high accurac# sam"le-data circuit8 such as

switch ca"acitor filters8 ,4D and D4, con!erters.

@ew feature technologies with small feature si1es $such as +=(nm and >(nm8 '&nm8

53nm) can o"erate at increasingl# high s"eed $A+( B1)8 com"arable to some

bi"olar technologies.

i"olar silicon technologies

i"olar technologies can o"erate at higher frequencies than CMOS with relati!el#

larger "ower consum"tion.

Suitable for "ure analog integration with relati!el# high o"erating s"eed $such as ;*

circuit) or relati!el# high "ower $such asAsymmetric Digital Subscriber Line--,DS6

line dri!er) a""lications.

Digital circuits in bi"olar are "ower hungr#8 "rohibiting !er# large scale integration.

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Introduction +&

7h# CMOS Mixed-Signal Integration

$cont.)

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*requenc# of signals used in signal

"rocessing a""lications

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*requenc# that can be "rocessed b#

different technologies

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@MOS Transistor $nwell "rocess)

Introduction 3(8+3 for 65 nm technology

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Introduction 3+

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Introduction 33

Passi!e com"onents

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Introduction 3'

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Summar#

Introduction 3&