CMOS Analog Circuit Design(1).pdf

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Allen and Holberg - CMOS Analog Circuit Design
Page I.0-1
I. INT RODUCTION
Contents
I.1 Introduction
I.2 Analog Integrated Circuit Design
I.3 Technology Overview
I.4 Notation
I.5 Analog Circuit Analysis Techniques
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Allen and Holberg - CMOS Analog Circuit Design
Page I.0-2
Organization
Chapter 10
D/A and A/D
Converters
Chapter 11
Analog Systems
SYSTEMS
Chapter 7
CMOS
Comparators
Chapter 8
Simple CMOS
Opamps
Chapter 9
High Performance
Opamps
COMPLEX
CIRCUITS
Chapter 5
CMOS
Subcircuits
Chapter 6
CMOS
Amplifiers
SIMPLE
Chapter 2
CMOS
Technology
Chapter 3
CMOS Device
Modeling
Chapter 4
Device
Characterization
DEVICES
Introduction
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Allen and Holberg - CMOS Analog Circuit Design
Page I.2-1
I.1 - INTRODUCTION
GLOBAL OBJECTIVES
• Teach the analysis, modeling, simulation, and design of analog circuits
implemented in CMOS technology.
• Emphasis will be on the design methodology and a hierarchical
approach to the subject.
SPECIFIC OBJECTIVES
1. Present an overall, uniform viewpoint of CMOS analog circuit design.
2. Achieve an understanding of analog circuit design.
• Hand calculations using simple models
• Emphasis on insight
• Simulation to provide second-order design resolution
3. Present a hierarchical approach.
• Sub-blocks
®
Blocks
Circuits
®
Systems
4. Examples to illustrate the concepts.
®
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Allen and Holberg - CMOS Analog Circuit Design
Page I.2-1
I.2 ANALOG INTEGRATED CIRCUIT DESIGN
ANALOG DESIGN TECHNIQUES VERSUS TIME
FILTERS
AMPLIFICATION
Passive RLC circuits
Open-loop amplifiers
1935-1950
Active-RC Filters
Feedback Amplifiers
Requires precise definition
of passive components
Requires precise definition
of time constants (RC
products)
1978
Switched Capacitor
Filters
Requires precise C
ratios and clock
Switched Capacitor
Amplifiers
Requires precise C
ratios
1983
Continuous Time
Filters
Time constants are
adjustable
Continuous Time
Amplifiers
Component ratios
are adjustable
1992
?
Digitally assisted analog circuits
?
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Allen and Holberg - CMOS Analog Circuit Design
Page I.2-2
DISCRETE VS. INTEGRATED ANALOG CIRCUIT DESIGN
Activity/Item
Discrete
Integrated
Component Accuracy Well known
Poor absolute accuracies
Breadboarding?
Yes
No (kit parts)
Fabrication
Independent
Very Dependent
Physical
PC layout
Layout, verification, and
Implementation
extraction
Parasitics
Not Important
Must be included in the
design
Simulation
Model parameters well
Model parameters vary
known
widely
Testing
Generally complete
Must be considered
testing is possible
before the design
CAD
Schematic capture,
Schematic capture,
simulation, PC board
simulation, extraction,
layout
LVS, layout and routing
Components
All possible
Active devices,
capacitors, and resistors
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