UHF RFID 태그 칩용 저전력 EEPROM설계

이원재,이재형,박경환,이정환,임규호,강형근,고봉진,박무훈,하판봉,김영희,Yi, Won-Jae,Lee, Jae-Hyung,Park, Kyung-Hwan,Lee, Jung-Hwan,Lim, Gyu-Ho,Kang, Hyung-Geun,Ko, Bong-Jin,Park, Mu-Hun,Ha, Pan-Bong,Kim, Young-Hee 한국정보통신학회 2006 한국정보통신학회논문지 Vol.10 No.3

본 논문에서 는 플래쉬 셀을 사용하여 수동형 UHF RFID 태그 칩에 사용되는 저전력 1Kb 동기식 EEPROM을 설계하였다. 저전력 EEPROM을 구현하기 위한 방법으로 다음과 같은 4가지 방법을 제안하였다. 첫째, VDD(=1.5V)와 VDDP(=2.5V)의 이중 전원 공급전압 방식을 사용하였고, 둘째, 동기식 회로 설계에서 클럭(clock) 신호가 계속 클럭킹(clocking)으로 인한 스위칭 전류(switching current)가 흐르는 것을 막기 위해 CKE(Clock Enable) 신호를 사용하였다. 셋째, 읽기 사이클에서 전류 센싱(current sensing) 방식 대신 저전력 소모를 갖는 clocked inverter를 사용한 센싱 방식을 사용하였으며, 넷째, 쓰기 모드시 Voltage-up 변환기(converter) 회로를 사용하여 기준전압 발생기(Reference Voltage Generator)에는 저전압인 VDD를 사용할 수 있도록 하여 전력 소모를 줄일 수가 있었다. $0.25{\mu}m$ EEPROM 공정을 이용하여 칩을 제작하였으며, 1Kb EEPROM을 설계한 결과 읽기 모드와 쓰기 모드 시에 소모되는 전력은 각각 $4.25{\mu}W$와 $25{\mu}W$이고, 레이아웃 면적(layout area)은 $646.3\times657.68{\mu}m^2$이다. In this paper, a low-power 1Kb synchronous EEPROM is designed with flash cells for passive UHF RFID tag chips. To make a low-power EEPROM, four techniques are newly proposed. Firstly, dual power supply voltages VDD(1.5V) and VDDP(2.5V), are used. Secondly, CKE signal is used to remove switching current due to clocking of synchronous circuits. Thirdly, a low-speed but low-power sensing scheme using clocked inverters is used instead of the conventional current sensing method. Lastly, the low-voltage, VDD for the reference voltage generator is supplied by using the Voltage-up converter in write cycle. An EEPROM is fabricated with the $0.25{\mu}m$ EEPROM process. Simulation results show that power dissipations are $4.25{\mu}W$ in the read cycle and $25{\mu}W$ in the write cycle, respectively. The layout area is $646.3\times657.68{\mu}m^2$.

0.2 ${\mu}m$ Wide-Head T-Gate PHEMT 제작에 관한 연구

전병철,윤용순,박현창,박형무,이진구,Jeon, Byeong-Cheol,Yun, Yong-Sun,Park, Hyeon-Chang,Park, Hyeong-Mu,Lee, Jin-Gu 대한전자공학회 2002 電子工學會論文誌-SD (Semiconductor and devices) Vol.39 No.1

본 논문에서는 서로 다른 dose를 갖는 이중 노광 방법을 사용한 전자빔 묘화 방법을 이용하여 0.2 ㎛의 wide-head T-게이트를 갖는 PHEMT를 제작하였다. 0.2 ㎛의 게이트 길이와 1.3 ㎛의 게이트 머리의 크기를 갖는 wide-head T-게이트를 형성하기 위하여 PMMA/P(MMA-MAA)/PMMA의 3층 레지스트 구조를 사용하였다. 0.2 ㎛의 게이트 길이와 80 ㎛의 단위 게이트 폭 및 4개의 게이트 핑거를 갖는 PHEMT의 DC 특성으로 323 ㎃/㎜의 드레인 전류 밀도 및 232 mS/㎜의 최대 전달 컨덕턴스를 얻었다. 또한 동일한 소자의 RF 특성으로 40 ㎓에서 2.91 ㏈의 S/sub 21/ 이득과 11.42 ㏈의 MAG를 얻었으며, 전 이득 차단 주파수와 최대 공진 주파수는 각각 63 ㎓와 150 ㎓였다. n this paper, we have fabricated pseudomorphic high electron mobility transistors (PHEMT) with a 0.2 ${\mu}{\textrm}{m}$ wide-head T-shaped gate using electron beam lithography by a dose split method. To make the T-shape gate with gate length of 0.2 ${\mu}{\textrm}{m}$ and gate head size of 1.3 ${\mu}{\textrm}{m}$ we have used triple layer resist structure of PMMA/P(MMA-MAA)/PMMA. The DC characteristics of PHEMT, which has 0.2 ${\mu}{\textrm}{m}$ of gate length, 80 ${\mu}{\textrm}{m}$ of unit gate width and 4 gate fingers, are drain current density of 323 ㎃/mm and maximum transconductance 232 mS/mm at $V_{gs}$ = -1.2V and $V_{ds}$ = 3V. The RF characteristics of the same device are 2.91㏈ of S21 gain and 11.42㏈ of MAG at 40GHz. The current gain cut-off frequency is 63GHz and maximum oscillation frequency is 150GHz, respectively.ively.

A comparative study on the inhibitory effects of mast cell-mediated allergic reactions by artificially cultured and wild Acanthopanax senticosus

Yi, Jin-Mu,Jeong, Hyun-Ja,Shim, Kyung-Shik,Lee, Kang-Yong,Kim, Jeong-Sook,Zheng, Cui,Tomoko, Jippo,Lee, Young-Mi Kyung Hee Oriental Medicine Research Center 2000 International journal of oriental medicine Vol.1 No.2

We compared the effect between CAS and WAS(root, stem) on mast cell-mediated allergic reaction. CAS, WAS-root and WAS-stem, significantly inhibited compound 48/80-induced systemic allergic reaction(1g/kg) and histamine release from RPMC(1mg/ml). CAS, WAS-root and WAS-stem also inhibited passive cutaneous anaphylactic reaction. In addition, IgE-induced $TNF-{\alpha}$ secretion from RBL-2H3 was inhibited by pretreatment of CAS, WAS-root or WAS-stem$(0.01{\mu}g/ml)$. Taken together, inhibitory effect on mast cell-mediated allergic reactions of WAS-root is greater than those of WAS-stem but less than those of CAS.

SM709, Ingredient of Antimelanogenic Bamboo Extract, Blocks Endothelin-1-induced $[Ca^{2+}]_i$ Increase in Human Melanocytes

Kim, Shin-Hee,Lee, Ki-Mu,Kim, Hyo-Shin,Lee, Gyu-Seung,Jeon, Byeong-Hwa,Kim, Kwang-Jin,Park, Jin-Bong The Korean Society of Pharmacology 2003 The Korean Journal of Physiology & Pharmacology Vol.7 No.6

Endothelins secreted from keratinocytes are intrinsic mitogens and melanogens of human melanocytes in UVB-induced hyperpigmentation. To elucidate the cellular mechanism of antimelanogenic activity of bamboo extract, the effects of three ingredients of bamboo extract on endothelin 1 (ET-1)-induced $Ca^{2+}$ mobilization were investigated in cultured human melanocytes. ET-1 receptors in human melanocytes were characterized by using specific antagonist, and ET-1 was found to increase intracellular $Ca^{2+}$ concentration ($[Ca^{2+}]_i$) by activating ET-B receptor. SM709 (1,2-O-diferulyl-glycerol), an ingredient of bamboo extract, inhibited ET-1-induced $[Ca^{2+}]_i$ increase in a concentration- and time-dependent manner, although another ingredients SM707 and SM708 had no effect on ET-1-induced $[Ca^{2+}]_i$ increase in human melanocytes. SM709 ($100{\mu}M$), however, did not affect $[Ca^{2+}]_i$ increase induced by thapsigargin and caffeine, suggesting that SM709 has no effect on the $Ca^{2+}$ store in melanocytes. Furthermore, SM709 did not affect $[Ca^{2+}]_i$ increase induced by LPA or ATP, known as G protein-mediated PLC activators like ET-1. Taken together, it is suggested that SM709 antagonizes ET-1-induced transmembrane signaling through ET-B receptor, which maybe a possible underlying mechanism of antimelanogenic activity of bamboo extract in human melanocytes.

인동덩굴로부터 분리된 Cynaroside이 Doxorubicin으로 유도된 인간 근위세뇨관 HK-2 세포의 괴사에 미치는 저해 효과

노종현,정호경,이무진,장지훈,심미옥,정자균,정다은,안병관,조현우,Nho, Jong Hyun,Jung, Ho Kyung,Lee, Mu Jin,Jang, Ji Hun,Sim, Mi Ok,Jung, Ja Kyun,Jung, Da Eun,An, Byeong Kwan,Cho, Hyun Woo 한국약용작물학회 2017 한국약용작물학회지 Vol.25 No.5

Background: Cynaroside is a flavone, a flavonoid-like compound, known by different names (luteoloside and cinaroside). It is commonly found in Lonicera japonica Thunb., Chrysanthemum moriflium, and Angelica keiskei. The process of cell death has been classified as necrosis and apoptosis. Necrosis refers to unregulated cell death induced by a chemotherapeutic agent. Doxorubicin is an anthracycline anti-cancer drug used to treat acute leukemia, cancer, and lymphoma. However, it induces nephrotoxicity including tubular damage. Therefore, we investigated the protective effect of cynaroside against doxorubicin-induced necrosis in HK-2 cells. Methods and Results: To confirm the beneficial effect of cynaroside on doxorubicin-induced necrosis, HK-2 cells, a human proximal tubule epithelial cell line were treated with $10{\mu}M$ doxorubicin and $80{\mu}M$ cynaroside. Doxorubicin treatment resulted in increased DNA fragmentation, caspase-3 activity and mitochondria hyperactivation during cell necrosis. However, pretreatment with $80{\mu}M$ cynaroside attenuated DNA fragmentation, caspase-3 activity and mitochondria hyperactivation induced by $10{\mu}M$ doxorubicin in HK-2 cells. Conclusions: These results indicated that pretreatment with cynaroside ameliorated doxorubicin-induced necrosis in HK-2 cells. Therefore, cynaroside be used as a therapeutic agent for improving doxorubicin-induced nephrotoxicity. However, further studies are required to evaluated the toxicity of cynaroside treatment in animals and to determine its protective effect against doxorubicin-induced nephrotoxicity in an animal model.

대학 행정직원의 조직관련 태도와 갈등수준

이무진 明知大學校 文獻情報學會 2004 文獻情報學論集 Vol.8 No.-

이 연구의 목적은 태도와 갈등 이론을 바탕으로 한 실증적 연구를 통하여 대학 행정직원의 조직관련 태도와 갈등수준을 조사 분석하여 대학 경영활동에 도움을 주고자 하는 것이다. 우선 인적특성에 따른 조직관련 태도와 갈등수준 차이를 분석하고 이들 간의 상관관계를 분석한다. 갈등수준에 가장 큰 영향을 미치는 조직관련 태도를 밝히기 위해 단계적 회귀분석을 실시한다. 이 연구의 목적을 달성하기 위한 데이터를 수집하기 위해서 K대학교 직원 109명을 조사대상으로 하였다. 109명의 조사 대상 총 109명의 조사 대상 중 99명 에게 배부하였으며, 그 중 76부(회수율 76.77%)가 회수되었다. 회수된 설문지 중에서 응답 내용이 성실하지 않은 15부를 제외한 61부를 분석 대상으로 하였다.

단일반응조에서 이상 생물막법에 의한 질소제거

이무강,김영철,강호진 慶星大學校 環境問題硏究所 1996 環境硏報 Vol.6 No.1

The effects of C/N ratios on COD removal rate, nitrification and denitrification were investigated by using anoxic reactor and oxic reactor in two phase biofilm. The C/N ratios of reactors was controlled to the level of 12.1/1, 6/1, 3/1, 1.6/1, respectively. The nitrification and denitrification using two phase biofilm in single reactor system reached the following results. The effects of DO on nitrification and denitrification were not influenced by DO concentration, the DO concentration of anoxic reactor and oxic reactor showed 2.3∼5.0㎎/a, 0.2∼0.9㎎/1, respectively. The pH of anoxic reactor and oxic reactor reached most suitable pH at 7.2∼8.4. The COD removal rate increased according to increasing C/N ratios from 3/1 of C/N ratio increased ammonia removal rate at 43%∼78%. The denitrification rate reached the maximum at 40.9%∼51.4%, when C/N ratios were 3/1∼6/1. At 12.1/1 of C/N ratio, in generlly nitrogen removal used synthetic biomass, relatively decreased denitrification rate.

LAS含有都市下水의 塔式生物膜-活性汚泥混合工程에 依한 處理

李武康,崔基園,林成眞 慶星大學校 1990 論文集 Vol.11 No.3

When the synthetic wastewater including surfactant(LAS) is treated by a series TF-AS system, the results are obtained as follows; 1) It takes approximately 30 days from beginning operation to stabilize effluent concentration of each reactors under LAS conc. condition of 20,200 mg/ℓ. The above test results show that the COD removal rate is 85%, 65% in the TF reactor and 80%, 70% in the AS reactor. Therefore tatal COD removal rate is abtained 97%, 90% in the TF-AS reactors. 2) In order to obtain COD removal rate 70% above from TF reactor, the max. conditions are needed hydraulic loading 3.75ℓ/㎡ COD loading 2.55g/㎡ㆍd, LAS conc. 100 ㎎/ℓ. 3) When hydraulic loading is changed in the treatment of synthetic wastewater (LAS 20㎎/ℓ), the results are came out; Specific constant of media, n is 0.23 and Specific constant of wastewater, k'is 1.38 and the optimum parameter of the design in the TF reactors, k, k₃ is 2.813, 85.87. 4) COD removal rate of a series TF-AS system is obtained 90% over under the condition of the LAS concentration range(20㎎/ℓ-200㎎/ℓ)and also it is founded out that the more LAS concentration is added, the lower COD removal rate becomes. This makes as conclude the surfactant(LAS) causes microbial growth to be hindered by foam covered over biological film.

지방화시대의 지방엘리트체육 발전방안

이무진 釜山大學校 附設 體育科學硏究所 2004 體育科學硏究所 論文集 Vol.20 No.-

For the research of the local elite-sports development plan in the localization age, needed to research sundry record base on the government policy reference, the municipal authorities policy reference, ministry of education & human resource development(MOE) reference for schools, Korea sports council's players promotion plan and operation, plan of Busan sports council.....

코로나 플라즈마 처리에 의한 HDPE 표면의 개질에 관한 연구

최진숙,전종탁,정봉규,이근대,문명준,이종무 釜慶大學校 2001 釜慶大學校 論文集 Vol.6 No.-

We are able to generate the stable plasma in open air and nitrogen using a corona plasma treatment system(CPTS) with a high voltage. This was applied to treat the surface of rather non-polar HDPE(High Density Polyethylene) intended for the improvement of adhesion of over-coated layers such as coatings, printing inks. The surface tension of HDPE was significantly improved by the CPTS. The characteristics of surface layer were evaluated by means of contact angle measurement, ATR-FT/IR spectroscopy, and it was found that functional groups were introduced into the surface layer of the HDPE. The use of nitrogen was increased the surface tension of the HDPE from 33.8 mJ/m^2 to 66.56 mJ/m^2, and highly effective method of HDPE surface modification could be realized.