1

Kyusyu University Graduate School of Information Science and Electrical EngineeringDepartment of Electronics

Yoshida Laboratory (http://yossvr0.ed.kyushu-u.ac.jp/)

2006/12/04

Development of Low Power Consumption System LSIs for Next-Generation Wireless

Communication Systems

2

Driving Force: Wireless TechnologiesWireless LAN、Cell Phone、Cordless Telephone、IC Card, ITS, DSRC

Electronic-Toll Collection System.

Cell Phone Cordless PhoneWireless LAN

発進制御機発進制御機

車線監視カメラ

車両検知器

路側無線装置（アンテナ）

路側表示器（出口）

通信開始 装置

Camera Antenna

Ｓａｔｅｌｌｉｔｅ　Ｃｏｍｍｕｎｉｃａｔｉｏｎｓ

3

Silicon Sea Belt Fukuoka Project

Silicon Sea Belt Fukuoka ProjectSilicon Sea Belt Fukuoka Project

South KoreaSouth Korea

KyushuKyushu

OkinawaOkinawa

TaiwanTaiwanHong KongHong Kong

MalaysiaMalaysia

ShanghaiShanghai

＊Center of Semiconductor design.＊Semiconductor Industry: Driving force for the growth.＊ Fukuoka is addressing to establish a center of Excellence for SoC design in this area.＊Conventional Semiconductor Industry (Memory, Processor)-System LSI＊System LSI is expected to generate the higher added value to the cluster of related industry.

SingaporeSingapore

Silicon Sea Belt Fukuoka Project＊World production: 50%＊Large consumption region

Kyushu as a Silicon Island: A global base for System LSI design.

Institute of System LSI Design Industry, Fukuoka

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Fukuoka Soft Research Park

World Class Companies of Japan and Korea:Toshiba, Sony etc

SRP Center Building

Fukuoka Tower

ヤフードーム

Momochi Hama District

Yahoo Dome

Institute of System LSI Design Industry, Fukuoka　　　　（Kyushu University:Entrepreneur Promotion Center）　

Established on 2004

5

Some Activities of Institute of System LSI

Bridge between Academia and IndustryCollaboration in Silicon Sea BeltDesign of SoC (SW and HW)Venture CompaniesHuman Resource Sharing/Development

QUBE: Q-shu University hardware/software Borderless system design Education program (Advanced Education/Training)

Hardware design Courses

Software Design Courses

College of System LSI, Fukuoka

SLRC: System LSI Research Center, Kyushu University

Basic Education/Training

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Prof. Yoshida’s Lab Introduction

Key Words of Our Research① Miniaturization: SoC (System on Chip)② Low Power Consumption System

Tr. Amp.Digital Ckt.

Receiving RF Ckt

Receiving IF Ckt

Intersil 2.4GHz PCMCIA Card (PRISM 2.5)

PC Related

0

10

20

30

40

50

60

年間

出荷

台数

（世

界）（千

万台

）

Ref.Agere System, (USA）

Cell phones/domestic equipments etc.

500million or more/year

Market growth of wireless systems

Yea

rly P

rodu

ctio

n

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Block diagram of CMOS-LSI System for Wireless Communications

digital

proc.

PHY

Receiving part

Transmitting

PLL

Mixer

Mixer

ＬＮＡ

ＰＡ

A/D

D/A

VGA

Buff LPF

LPF

1-Chip:SoC Implementation (System on Chip)

With CollaborationDirect Conversion Receiver Type

Antenna

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Yoshida Laboratory’s Activity

・Digital Parts→Low Power architecture・RF・Analog circuits→miniaturization is necessary

Low power

High Cost of Conventional Analog Circuits

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System LSI Research and Development

Foundry(TSMC, Hitachi)

Innovative Ideas:Design

EDA Tools(CAD design tools)

By VDEC

Prototype model

Testing(Underground Floor)

Patents

Research Papers (Journals and International Conferences)

VDEC：VLSI Design and Education Center (University of Tokyo)

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Proposal of New Design Methodologies for RF Parts

Spiral Inductors MIM Capacitors　　　　　　

Lump Elements Distributed Elements

Spice Models

Freedom of Design

Meander line

λ/4 Line

Impedance reversal Ckt.（Inverter）

Reactance Compensation ckt.

Matching Circuits

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Prototype Design

TSMC 0.25µm CMOS (1P5M)Chip size=5mm x 5mm

LNA

DAC

PLL

VGA

BG

Mixer(Down)

Mixer+LNA

Mixer(Up)

LNAw/ CPW

LNAw/ L

CPW CPW

L L

L

L

L

L

L

L

L• LNA; Cascade, w/ CPW, w/ L• Mixer; Up, Down• Down Mx +LNA• PLL• BG• VGA• DAC• Inductor TEG• CPW TEG

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Development of Miniaturized Integrated Antennas

5cm

Intersil 2.4GHz PCMCIA Card (PRISM 2.5)

Miniaturized Integrated Antennas

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@2.4 GHz

Applications: SUICA Card and so on

Miniaturized Antenna

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Probe Station

Spectrum Analyzer

Lab Facilities of Testing

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Tr. System

RF/Analog Ckt

VGA ADCn

Mod. FEC ARQ

AGC

Repeat Request

Communication Link

Goal by the End of this Year

Low Power Consumption Direct Conversion Transceiver is expected to be tested by the end of this fiscal year.