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카디악 페이스메이커용 0.8V 816nW 델타-시그마 모듈레이터A 0.8V 816nW Delta-Sigma Modulator Applicaiton for Cardiac Pacemaker

Other Titles
A 0.8V 816nW Delta-Sigma Modulator Applicaiton for Cardiac Pacemaker
Authors
이현태허동훈노정진
Issue Date
Jan-2008
Publisher
대한전자공학회
Keywords
Delta-sigma modulator; bulk-driven OTA; cardiac pacemaker; analog-to-digital converter.; Delta-sigma modulator; bulk-driven OTA; cardiac pacemaker; analog-to-digital converter.
Citation
전자공학회논문지 - SD, v.45, no.1, pp 28 - 36
Pages
9
Indexed
KCI
Journal Title
전자공학회논문지 - SD
Volume
45
Number
1
Start Page
28
End Page
36
URI
https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/43017
ISSN
1229-6368
Abstract
이번 논문은 implantable cardiac 페이스메이커의 검출 단 로서 저전압, 저전력 단일-비트 삼차 델타-시그마 모듈레이터를 구현하였다. 1V이하의 전원 전압에서 효과적으로 동작하기 위하여 distributed feedforward구조와 벌크-드리븐 OTA를 활용하였다. 설계된 모듈레이터는 0.8V의 전원 전압에서 49dB의 dynamic range를 가지면서 816nW의 파워를 소모하였다. 파워 소모를 획기적으로 줄임으로서 페이스메이커뿐만 아니라 제한된 배터리에서 동작하는 implantable 의료 기기에서 다양한 활용이 가능할 것으로 생각된다. 본 모듈레이터의 칩 크기는 1000μm×500μm로서 0.18μm CMOS standard 공정으로 제작되었다
This paper discusses theimplementation of the low-voltage, low-power, third-order, 1-bit switched capacitor delta-sigma modulator of the implantable cardiac pacemaker. The distributed, feed-forward structure and bulk-driven OTA were used in order to achieve an efficient operation under a supply voltage of 1V or lower. The designed modulator has a dynamic range of 49dB at 0.9V supply voltage and consumes 816nW of power. Such a significant reduction in power consumption allows diverse applications, not only in pacemakers, but also in implantable biomedical devices that operate with limited battery power. The core chip size of the modulator is 1000μm*500μm manufactured, with the 0.18μm CMOS standard process.
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