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두 배의 Rail-to-Rail 입력 범위를 갖는 NTV SAR ADCopen accessDouble Rail-to-Rail NTV SAR ADC

Authors
조용준성기호서인식백광현
Issue Date
2018
Publisher
한국전기전자학회
Keywords
Analog-to-digital converter; energy efficient; low-power; successive approximation register; double rail-to-rail
Citation
전기전자학회논문지, v.22, no.4, pp 1218 - 1221
Pages
4
Journal Title
전기전자학회논문지
Volume
22
Number
4
Start Page
1218
End Page
1221
URI
https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/18763
DOI
10.7471/ikeee.2018.22.4.1218
ISSN
1226-7244
2288-243X
Abstract
본 논문은 두 배의 rail-to-rail 입력 전압 범위를 갖는 저-전력 0.6-V 10-bit 200-kS/s successive approximation register(SAR) analog-to-digital converter(ADC)를 제안한다. 제안된 near-threshold voltage(NTV)의 전원 전압을 갖는 회로는, 본질적인 입력 신호 전력 부족을 두 배의 rail-to-rail 입력 전압 범위를 구현함으로써 극복하였다. 이 회로는 일반적인 NTV회로에 비해 4배의 입력 신호 전력을 갖게 되고, 그로써 SAR ADC의 신호 대 잡음비(signal-to-noise ratio, SNR)를 개선했다. 제안된 ADC는 65-nm CMOS 공정을 이용하여 제작되었다. 0.6-V 전원 전압과 2.4-Vpp(차동쌍)의 입력 전압, 200-kS/s에서 ADC의 SNDR은 59.87 dB이며 전력 소모는 364.5-nW이다. ADC 코어가 차지하는 면적은 84×100㎛^2이다.
This paper presents a low-power 0.6-V 10-bit 200-kS/s double rail-to-rail successive approximation register (SAR)analog-to-digital converter (ADC). The proposed scheme allows input signal with 4 times power which is compared withconventional one by applying proposed rail-to-rail scheme, and that improves signal-to-noise ratio(SNR) of NTV SAR ADCs. The prototype was designed using 65-nm CMOS technology. At a 0.6-V supply and 2.4-Vpp(differential) and 200-kS/s, theADC achieves an SNDR of 59.87 dB and consumes 364.5-nW. The ADC core occupies an active area of only 84×100㎛^2.
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창의ICT공과대학 (전자전기공학부)
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