EECT 7327 - PowerPoint Presentation

Slide1

EECT 7327

Data Converters

Professor Yun Chiu

©

2014

Erik

Jonsson

School of Electrical Engineering and Computer Science

University of Texas at

DallasSlide2

Logistics

–

2 –

Instructor: Professor Yun Chiu

E-Mail: chiu.yun@utdallas.edu

Office Hour: Tuesday, 2-4 pm

, in ECSN 3.602

TA: TBA

TA Office Hour: TBA

Website: http://www.utdallas.edu/~chiu.yun/7327

Lecture notes, handouts, project assignments, etc. will be posted on the website (no paper copy will be distributed in class)Slide3

Prerequisites

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3 –

Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014

Analog circuit design

EECT 6326 (Analog IC Design), or equivalent at the level of G&M,

Razavi

, or similar books

Digital signal processing

EE 4361 (Digital Signal Processing), or equivalent at the level of O&S or similar books

Digital circuit design

Basic knowledge of gate/transistor-level logic design (logic family, sequential logic, etc.)

Some knowledge of AHDL or Verilog-A is helpful for the projectSlide4

Course

Outline (not in order)

– 4 –

Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014

Switched-capacitor circuit techniques and realization

SC amplifier and SC integrator

Review of topics in sampled-data signal processing

Sample-and-hold amplifier (SHA)

Nyquist

-rate data converters

Flash, algorithmic/cyclic, SAR, pipeline,

subranging

, etc.

Oversampled data converters

Single-loop, MASH, multi-bit, continuous-time,

etc.

Precision techniques for data conversion

Digital calibration, digital assistance, and digital post-processing

Data converter testing and benchmarks

Technology trend and figure-of-merit (

FoM

)

Advanced topics (if time allows)Slide5

Lecture Notes & Textbook

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Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014

Textbook: No required textbook. Lecture notes, slides, and papers will be posted on the course website.

References

Analog circuit design

Gray, et al., Analysis and Design of Analog Integrated Circuits, 4th Ed., Wiley, 2001

Razavi

, Design of Analog CMOS Integrated Circuits, McGraw-Hill, 2001

Johns and Martin, Analog Integrated Circuit Design, Wiley, 1997

Allen and

Holberg

, CMOS Analog Circuit Design, 2nd Ed., Oxford, 2002

Data converters

Razavi

, Principles of Data Conversion System Design, IEEE Press, 1995

van de

Plassche

, CMOS Integrated Analog-to-Digital and Digital-to-Analog Converters, 2nd Ed., Kluwer, 2003

Norsworthy

et al., Delta-Sigma Data Converters: Theory, Design, and Simulation, Wiley, 1996

Switched-capacitor circuits

Gregorian and

Temes

, Analog MOS Integrated Circuits for Signal Processing, Wiley, 1986 Slide6

CAD Tools

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Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014

CAD Tools required:

SpectreRF

SPICE-type analyses: .dc, .ac, .xf, .noise, .tran, etc.

Additional capabilities: pss, pac, pxf, pnoise, pdisto to analyze large-signal nonlinear circuits (e.g., switched-capacitor circuits, RF circuits)

MATLAB, Simulink

Mixed-domain behavioral modeling, analog/digital filter synthesis, etc.

CAD Tools recommended:

Cadence GUI suite (

awd, ocean, icfb, msfb, icde, icms, etc.

) for design entry, simulation, waveform display, etc.Slide7

Projects, Exam, and Grading

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7 –

Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014

A series of three phases of a nearly semester-long term project to build a

X-bit, Y-MS/s Z-type CMOS ADC…

Midterm exam: 30% (TBA)

Term Project:

70%

Phase I: 20

% (assigned in

4

th

week)

P

hase 2: 20% (assigned in 7

th

week)

P

hase 3: 30% (assigned in 10

th

week)

Project presentation: 5% (in class, last day of instruction)

Grading Policy

: Projects are to be completed by two-student groups, with each group submitting a joint report (and SPICE decks) in each phase.

Grading in each phase will

be independent

, i.e., based on phase-specific goals and specifications

.Slide8

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–Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014

Why This Course?

Isn’t Digital Great Enough?Slide9

Advantages of Digital VLSI

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Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014

Noise immunity, robustness

Unlimited precision or accuracy

Flexibility, programmability, and scalability

Electronic design automation (EDA) tools widely available and successful

Benefiting from

Moore’s law

– “The number of transistors on a chip doubles every 18 months,”

IEDM

, 1975

Cost/function drops 29% every year

That’s 30X in 10 yearsSlide10

Moore’s Law

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Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014

2004 International Technology Roadmap of Semiconductor (http://www.itrs.net/)Slide11

Moore’s Law

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Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014

“If GM had kept up with technology like the computer industry has, we would all be driving $25 cars that got 1,000 miles to the gallon…”

– Bill Gates,

COMDEX

keynote

Technology

Scaling Slide12

Just Digital is

far from enough

…– 12

–

Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014

Paul Gray’s eggshell diagramSlide13

Challenges for Analog

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Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014

Sensitive to noise – SNR (signal-to-noise ratio)

Subject to device nonlinearities – THD (total harmonic distortion)

Sensitive to device mismatch and process variations

Difficult to design, simulate, layout, test, and debug

Inevitable, often limits the overall system performance/cost

Scaling scenario outlook

High-speed, low-resolution applications benefit

High SNR design difficult to scale with low supply voltagesSlide14

Example 1 – Mixed-Signal Hearing Aid

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14 –

Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014

0.5

0.1

0.01

0.001

Normalized frequency

0

-150

-50

-100

[dB]Slide15

Example 2 – PRML Read Channel

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15 –

Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014Slide16

Example 3 – RF Transceiver

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Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014

Desirable

ChannelSlide17

Example 3 – RF Transceiver

–

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Data Converters Introduction Professor Y. Chiu

EECT 7327 Fall 2014

CMOS? or

something else?

Ericsson CH388

(Hybrid, 1995)

Ericsson Bluetooth

(CMOS, 2001)

Berk

ä

na

GSM/GPRS

(CMOS, 2005)

A

D

Past

Present

Future

Small form factor,

high integration, more functions,

low

power

Market/economy is

the ultimate driving force