다양한 회로 공유기법을 사용하는 10비트 100MS/s 27.2mW 0.8㎟ 0.18um CMOS Pipeline ADC

윤근영,이세원,이승훈,최민호 대한전자공학회 2009 電子工學會論文誌-SD (Semiconductor and devices) Vol.46 No.4

This work proposes a 10b 100MS/s 27.2mW 0.8㎟ 0.18um CMOS ADC for WLAN such as an IEEE 802.11n standard. The proposed ADC employs a three-stage pipeline architecture and minimizes power consumption and chip area by sharing as many circuits as possible. Two multiplying DACs share a single amplifier without MOS switches connected in series while the shared amplifier does not show a conventional memory effect. All three flash ADCs use only one resistor ladder while the second and third flash ADCs share all pre-amps to further reduce power consumption and chip area. The interpolation circuit employed in the flash ADCs halves the required number of pre-amps and an input-output isolated dynamic latch reduces the increased kickback noise caused by the pre-amp sharing. The prototype ADC implemented in a 0.18um n-well 1P6M CMOS process shows the DNL and INL within 0.83LSB and 1.52LSB at 10b, respectively. The ADC measures an SNDR of 52.1dB and an SFDR of 67.6dB at a sampling rate of 100MS/s. The ADC with an active die area of 0.8㎟ consumes 27.2mW at 1.8V and 100MS/s. 본 논문에서는 IEEE 802.11n 표준과 같은 근거리 무선통신망 응용을 위한 10비트 100MS/s 27.2mW 0.8㎟ 0.18um CMOS ADC를 제안한다. 제안하는 ADC는 고속 동작에 적합한 3단 파이프라인 구조를 기반으로 제작되었으며 각단에 공통적으로 사용되는 증폭기, 프리앰프 및 저항열을 최대한 효율적으로 공유함으로써 전력 소모 및 면적을 최소화하였다. 첫 번째 MDAC과 두 번째 MDAC에는 스위치 저항과 메모리 효과가 없는 증폭기 공유기법을 사용하였고, 세 개의 4비트 flash ADC에는 단 하나의 저항열만을 사용하는 동시에 두 번째 flash ADC와 세 번째 flash ADC에는 프리앰프를 공유하여 전력 소모와 면적을 최소화하였다. 보간 기법을 사용하여 요구되는 프리앰프의 수를 반으로 줄였으며, 프리앰프의 공유 및 보간 기법으로 인한 영향을 최소화하기 위해 낮은 킥-백 잡음을 갖는 비교기를 추가로 제안하였다. 제안하는 시제품 ADC는 0.18um 1P6M CMOS 공정으로 제작되었으며, 측정된 DNL 및 INL은 10비트 해상도에서 각각 최대 0.83LSB와 1.52LSB의 수준을 보이며, 동적 성능으로는 100MS/s의 동작 속도에서 각각 52.1dB의 SNDR과 67.6dB의 SFDR을 갖는다. 시제품 ADC의 칩 면적은 0.8㎟이며 전력 소모는 1.8V 전원 전압을 인가하였을 때 100MS/s에서 27.2mW이다.

도심지에 위치한 건축물을 위한 BIPV 시스템의 설계 및 평가

윤근영 한국태양에너지학회 2011 태양에너지 : 한국태양에너지학회지 Vol.10 No.1

해시체인기반의 경량화 RFID 인증 프로토콜

윤근영,김동성,박종서 한국융합보안학회 2006 융합보안 논문지 Vol.6 No.1

해시 체인 기반의 여러 RFID 인증 프로토콜들이 제안되었다. 상태기반 인증 프로토콜과 시도 응답기반 인증 프로토콜은 위치추적 공격, 스푸핑 공격, 재전송 공격, 트래픽 분석 공격에는 안프로토콜은 위치추적 공격, 스푸핑 공격, 재전송 공격, DoS 공격에는 안전하지만 트래픽 분석 공격에는 취약하다. 본 논문에서는 이런 문제점들을 보완하기 위해 해시체인 인증 프로토콜과 위치 추적과 서비스 거부 공격에 강한 RFID 인증 프로토콜의 장점을 결합하여 좀 더 안정적이며 경량화 된 RFID 인증 프로토콜을 제안한다. 제안 프로토콜의 보안성을 분석한 결과 위치추적 공격, 스푸핑 공격, 재전송 공격, 트래픽 분석 공격, DoS 공격 측면에서 안전한 것으로 나타나며 이외의 경량화 된 RFID 인증 프로토콜임을 보인다 It h a s b e n p r o p o s e d t h a t s e v e r a l R F I D a u t h e n t i c a t i o n p r o t o c o l s b a s e d o n h a s h c h a i n . S t a t u s b a s e d authentication protocol and challenge-response based authentica tion protocol are secured against affic analysis attacks but are vulnerable to Dos attacks. RFID authentication protocol with strong resistance against traceability and denial of service attack is secured against location tracking attack, spoofing attacks, replay attacks, DoS sent study suggests a more secure and lightweight RFID authentication protocol which is combining the advantages of hash-chain authentication protocol and RFID authentication protocol with s and denial of service attack. The results of the secure analysis for a proposed protocol are illustrated that it is secured against location tracking attacks, spofing attacks, replay attacks, traffic analysis ver and tag.

共同住宅團地內 綠化用 樹木의 生長特性

尹根榮,安建鏞 한국환경과학회 1996 한국환경과학회지 Vol.5 No.3

The purpose of this study was to provide basic data of the growth characteristics of the landscape trees for better landscape planting design, construction and maintenance through the prediction of landscape change as time passes by the analysis of survival rate, distribution patterns & increment percent of tree height, width, stem diameter (breast or surface) of widely used six tree species in Seongnam-si Eunhang-jugong apartment housing areas (8 years have passed after landscape planting work). The main results can be summarized as follows: The tree survival rate of Pinus parviflora was the highest rate 89.2% than any other species, but Acer buergerianum showed the lowest survival rate as that of it 35.0%, & that of Picea abies 70.5 %, Metasequoia glyptostroboides 71.6%, Magnolia denudata 38.9%, Acer palmatum was 71.7%. As a whole, the tree survival rate of coniferous trees were relatively high. The tree height increment percent of the deciduous species were relatively high. And that of Metasequoia glyptostroboides was the highest rate 11.61 % than any other species, but that of Magnolia denudata was the lowest rate 5.59% than any other species. According to this results, the increment percent of trees in this apartment areas were comparatively lower than that of each related species planted in nursery area. And this results would be considered when landscape experts do landscape planting design, construction & maintenance. The distribution patterns of present tree size showed a Normal Distribution like any other biological features.

Synthesis and properties of poly(methylhydro)siloxane based UV cured solid polymer electrolytes

윤근영,류상욱 한국고분자학회 2010 한국고분자학회 학술대회 연구논문 초록집 Vol.2010 No.10

아파트단지내 조경용 교목의 입지조건별 생장특성

윤근영,안건용 한국조경학회 1998 韓國造景學會誌 Vol.26 No.2

A site survey in two apartment complexes and a nursery experiment were carried out in this study to provide basic data of the long-pending growth characteristics of major landscaping trees, such as Picea abies, Pinus parviflora, Metasequoia glyptostroboides, Magnolia denudata, Acer buergerianum and Acer palmatum. According to the main results, the survival rates were very low, reflected by the average survival rate of the four species was 95% at the nursery site. And, it was presumed that the site conditions of two apartment complexes for tree growth were very inferior to those of the nursery site, taking into consideration that the increment percents of growth factors of the tree species at the nursery site were relatively higher than those of the apartment complexes. The distribution patterns of the current growth factors of trees showed a normal distribution. The regression equation of breast diameter on diameter at root collar showed especially high predictability. And, it was thought that the most critical limiting environmental factors on tree growth at the apartment complexes were found to be alkaline pH caused by excessive Ca, high percent base saturation, insufficiency of available moisture content, bad drainage due to inferior soil texture, high soil hardness, lack of organic matter and shortage of cation exchange capacity in soil.

영구자석 매입형 전동기의 누설자속 저감 방안에 대한 연구

윤근영,권병일 대한전기학회 2012 대한전기학회 학술대회 논문집 Vol.2012 No.4

본 논문에서는 자속집중형 IPM type BLDC 전동기의 누설자속을 저감하고자 Rotor core와 Magnet 적층높이에 Overhang 구조를 제안한다. 또한 3차원 F.E.M 해석을 통하여 제안된 모델에 대한 상역기전력 및 코깅 토오크, T.H.D의 크기를 비교하여 Rotor core의 누설자속이 개선되는 Overhang 구조를 도출하였다.

저전압 대전류용 IPM type BLDC 전동기 설계 및 특성해석

윤근영,류세현,양병렬,권병일 韓國職業再活學會 2004 職業再活硏究 Vol. No.

This paper presents a design and characteristics analysis of interior permanent magnet (IPM) type BLDC motor for electric vehicle. In order to design of IPM type BLDC motor, surface mounted permanent magnet(SPM) type BLDC motor is used as the initial design model. According to the size of permanent magnet, the steady state characteristics is analysized by equivalent magnetic circuit method. The characteristics analysis results of the designed motor is compared with the experimental results.

실내환경 쾌적 제어와 건물 에너지

윤근영 대한설비공학회 2015 설비저널 Vol.44 No.8

초등교사의 발달단계와 수업전문성과의 관계

윤근영 초등교육학회 2007 初等敎育學硏究 Vol.14 No.2