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1

피자 서비스에서의 가격 공정성과 재구매 의도에 대한 건강 염려의 조절효과

이원석, 문준호, 박세종

한국외식산업학회 한국외식산업학회지 제14권 제1호 통권 제38호 2018.03 pp.141-152

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This study examined the moderating effect of health concern between brand awareness and repurchase intention. Health belief model is the theoretical underpinning of this research. Brand awareness and price fairness are the determinants of repurchase intention. The survey participants were American consumers. Also, this study collected the data using Amazon Mechanical Turk. The number of observation is 335. The main instrument is survey in this research. For the data analysis, this study employed exploratory factor analysis, frequency analysis, correlation analysis, and multiple regression analysis. The finding suggested that health concern negatively moderate the association between brand awareness and repurchase intention. This study also found that price fairness positively affected to repurchase intention. This research chose demographic information as control variables. The results presented non-significance to account for the revisit intention in the context of pizza service.

4,300원

2

피자이용객에게 있어 지각된 위험 및 만족에 관한 연구

문준호, 오송희

한국외식산업학회 한국외식산업학회지 제13권 제4호 통권 제37호 2017.12 pp.167-181

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In the food service industry, pizza business is an important domain in terms of economic outcomes (e.g., sales and employment). Despite of the importance, scant research has been executed to figure out the characteristics of pizza consumers. Therefore, the main purpose of the study is to investigate the determinants of satisfaction and perceived risk in a pizza restaurant. Based on the literature evidence, the variables used in the study are price fairness, health concern, brand awareness, and taste. Given the evidence of literature review, we proposed eight research hypotheses. For data collection, Amazon Mechanical Turk was used. The period of data collection is the first week of August in 2017. The participants are consumers in the US market. This study employed survey for the data collection. This research adopted prior literature and modified it for the research purpose. To help the understanding of participants, this research chose Domino’s service and product as the research context. As the data analysis instruments, confirmatory factor analysis, correlation analysis, and path analysis of structural equational modeling were executed. In regards to the study results, price fairness, brand awareness, and taste can reduce perceived risk, whereas health concerns increase the level of perceived risk. Also, we identified that price fairness and taste are significant determinants of satisfaction in the consumption of pizza product and service.

4,800원

3

사물인터넷(IoT) 기술특성이 SCM 기대성과 및 도입의도에 미치는 영향에 관한 연구 : 중국 물류공급망 및 유통업체를 대상으로

상맹, 신용호, 이철우, 문준호

한국경영정보학회 Information Systems Review 제19권 제3호 2017.09 pp.1-21

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IoT 기술 도입특성들 중 어떠한 요인들이 기업의 기대성과에 영향을 미치는지를 파악하고자 하는 것이며, 아울러 IoT 신기술 도입을 검토하고자 하는 기업들이 고려해야 할 사전 요인들을 제시해 보고자 한다. 데이타 분석을 위해 국내․외 IoT(사물인터넷) 관련 데이타, 출판물 및 웹사이트 그리고 각종 연구기관 분석데이타와 보고자료를 기반으로 이론적 배경을 정리하였으며, 추가로 선행연구를 참조하여 UTAUT 관련 이론적 배경을 요약하였다. 데이터 분석을 위해 SPSS 22.0과 구조방정식모델 분석을 위해서 smart PLS 2.0 통계프로그램을 사용하였다. 기술통계분석은 신뢰성분석, 타당성분석 및 구조방정식 모델 분석과 연구가설을 검증하였다. 측정모형에 대한 분석을 통해서 내적신뢰성과 집중타당성 및 판별타당성이 충족됨을 확인하였으며, IoT 기술특성과 기대성과 간 관계, 기대성과와 도입의도 간 관계에 대한 가설 검증결과 모두 채택되었다. 따라서 IoT 기술특성은 기대성과에 긍정적 영향을 미치며 기대성과는 IoT 도입의도에 긍정적 효과를 미치는 것을 확인하였다. 본 연구는 IoT 기술특성과 기대성과요인이 도입의도에 미치는 영향에 관한 인과관계를 규명함으로써 IoT를 성공적으로 도입할 수 있는 지침을 제시함고 동시에 IoT를 도입하고자 기업들에게 사전 고려해야 할 요인들(공급사슬 유연성, 운영비용 절감, 자산활용 최적화 및 신규수익 창출)을 제시할 수 있는 연구기반을 조성하였다.
The Internet of Things (IoT) analysis aims to verify the technical characteristics, performance expectations, and adoption intentions of IoT. This work refers to IoT data from foreign and domestic publications and websites as well as aims to benefit related organizations by referring to reports from agencies. The literature review summarizes the relevant theories and background of the unified theory of acceptance and use of technology. The SPSS 22.0 software and structural equation models (smart PLS 2.0) are used in the data analysis. Technical statistics analysis, reliability analysis, validity analysis, structural equation models, and statistical methods are employed to test the research hypotheses, that is, the technical characteristics of IoT will have positive effects on its performance expectations. This study introduces the characteristics and expected performance of IoT to present relevant IoT guidelines for companies that aim to adopt such technology.

5,700원

4

최고경영자의 외식산업에서의 전략적 의사 결정

문준호

한국외식산업학회 한국외식산업학회지 제13권 제2호 통권 제35호 2017.06 pp.133-144

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TThis study investigated how the attributes derived from upper echelon theory explain the franchising of restaurants. In accordance with risk-sharing theory, franchising is regarded as a risk-averse strategic choice rather than a risk-seeking strategic choice from the perspective of franchisor. The sample was derived from publicly traded restaurant companies. The chief executive officer (CEO) was selected as the proxy for the upper echelon. Data was collected from Compustat, Execucomp, and Annual 10K. The study period was 1999–2013 and the number of observation was 204. For the analysis of panel data, this research employed a two-way fixed effect regression model. The results suggested that educational level is negatively associated with the execution of franchising, whereas the value of share ownership has a positive effect on franchising execution. Also, this research showed that female CEOs prefer franchising more than male CEOs. Logistic regression was the main instrument used to account for the decisions of top managers. The results indicated that both share ownership and stock option positively affected the decisions of a limited service restaurant CEO.

4,300원

5

Examination of dividends in restaurant industry using Heckman regression

Moon, Joon-Ho

한국외식산업학회 한국외식산업학회지 제12권 제1호 통권 제30호 2016.03 pp.59-65

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Despite the critical nature of determining the amount of a dividend, most hospitality literature has focused on predicting a decision for issuing a dividend. This research employs the Heckman regression to identify whether or not a decision is likely to occur and the size of the dividend. The study period was 2000-2012, and the results indicate that two decision making processes, return on assets (ROA) and firm size, or previous period’s dividend, are common determinants for both predicting a dividend and the scale of the dividend. This research also verified that liquidity accounted for the size of a dividend. The study contributes to the literature of the restaurant industry by further clarifying the decision-making processes for determining dividends.

4,000원

6

외식업관리자의 리더십, 종업원의 직무태도 및 직무특성의 관계연구

문준호

관광경영학회 관광경영연구 제15권 제3호 통권 48호 2011.09 pp.63-88

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This paper divided the leadership styles of the manager of a business unit of food service into transactional leadership and transformational leadership, and investigated how they influence the job attitudes of the employees by moderating of job characteristics. To achieve the purpose of this study, this paper analyzed the studies on leadership in business administration and the advanced empirical research. Independent variables in the study model are transactional and transformational leadership, dependent variables are additional efforts, organizational commitment and job satisfaction, and moderation variable is job characteristics. This paper gave operational definitions to the variables and set up the hypotheses to test the study model. The measuring tools based on the operational definitions are MLQ-5X, MLQ-1 and MSQ. The result of this study shows as follows:First, transformational leadership influences additional efforts, organizational commitment and job satisfaction more and positively than transactional leadership. Second, job characteristics moderates the relations between leadership, additional efforts, organizational commitment and job satisfaction. The moderation effects of job characteristics on transformational leadership are more than that on transactional leadership.

6,400원

7

포락선 추적 WCDMA 기지국 응용을 위한 전력증폭기 모듈

장병준, 문준호

한국위성정보통신학회 한국위성정보통신학회논문지 제5권 제2호 2010.12 pp.82-86

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본 논문에서는 포락선추적 기능을 갖는 WCDMA 기지국에 사용될 수 있는 GaN FET를 이용한 전력증폭기 모듈을 설계하고, 제작 및 측정결과를 제시하였다. 개발된 전력증폭기 모듈은 소신호 RF 신호를 입력받아 고이득 MMIC 증폭기, 구동 증폭기 및 전력 증폭기 등을 거쳐 10W 이상의 출력을 생성할 수 있다. 또한, Envelope Tracking 응용을 위해서 최종 전력증폭기의 Drain 전압이 가변되어도 전체 모듈이 안정적으로 동작할 수 있도록 발진방지회로, Isolator, 음전압 우선인가 바이어스 회로가 설계되었다. 모든 바이어스 회로와 RF회로를 17.8× 9.8× 2.0 cm3 크기의 하우징 안에 집적화하여 소형화시켰다. 측정결과 바이어스 전압이 4V에서 28V까지 가변할 경우 30dBm에서 40dBm까지 출력이 가변되면서도 35%이상의 일정한 효율 특성을 나타내어 포락선 추적 기능을 수행할 수 있음을 확인하였다.
In this paper, a power amplifier module for WCDMA base-station applications is designed and implemented using GaN field-effect transistors (FETs), which uses an envelope tracking bias system . The designed module consists of an high gain MMIC amplifier, a driver amplifier, a power amplifier, and bias circuits for envelope tracking applications. Especially, a FET bias sequencing circuit and two isolators are integrated for stable RF operations. All circuits are assembled within a single housing, so its dimension is just 17.8× 9.8× 2.0 cm3. Measured results show that the developed power amplifier module has good envelope tracking capability: the power-added efficiency of 35% at the output power range from 30dBm to 40dBm over a wide range of drain bias.

4,000원

8

Neuroendocrine carcinoma of the lung 치험 2례

문준호

[Kisti 연계] 대한흉부외과학회 대한흉부외과학회지 Vol.25 No.8 1992 pp.806-811

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The primary neuroendocrine carcinomas[NEC] of the lung are relatively rare. There are classified histologically into the following groups. 1] bronchial carcinoid, 2] well differentiated neuroendocrine carcinoma[WDNC], 3] intermediate cell neuroendocrine carci-noma[ICNC], 4] small cell neuroendocrie carcinoma[SCNC]. The NE cells can be found throughout the mucosa of the bronchial tree by the electron microscopy. By the immunocytochemistry, Neuron-specific enolase[NSE], serotonin, born-csin, and calcitonin are found in normal solitary NE cells and neuroepithelial bodies. The immunohistochemistry has the advantage that it can be applied on routine pathology specimens. The NSE was localized in all of the NE granule bearing tumors but also present in 57 per cent of the non NE carcinomas. Together the combination of chromogranin A, bombesin and NSE should provide an exellent signature for tumor cells expressing NE features, such as carcinoids and other NE carcinomas. We have experienced two cases of primary pulmonary NEC in 59 and 29 years old men. The former was admitted due to exertional dyspnea and left chest pain, the latter, newly developed mass on chest X-ray. They were treated by Lt pneumonectomy with LN dissection and RLL resection with LN dissection The postoperative diagnoses were could be confirmed by NSE study as NEC which were SCNEC and INEC in subgroups. The postoperative courses were uneventful.

원문보기
9

원자력법령의 이해 및 실제

문준호

[Kisti 연계] 대한방사선치료학회 대한방사선치료학회 학술대회논문집 2005 p.21

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10

DiGeorge 증후군에 동반된 복합 심기형 치험 1례

문준호

[Kisti 연계] 대한흉부외과학회 대한흉부외과학회지 Vol.26 No.11 1993 pp.886-889

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The DiGeorge syndrome is a rare congenital anomaly of absent or hypoplastic thymus and parathyroid glands. Authors experienced a case of DiGeorge syndrome with complex cardiac anomaly. The complex cardiac anomaly was tetralogy of Fallot with origin of the right pulmonaly artery from the posterolateral ascending aorta.His face showed hypertelorism,short philtrum,"fish-like"mouth and micrognathia. This patient underwent total correction of tetralogy of Fallot and end-to-side anastomosis between right pulmonaly artery and side of main pulmonaly artery. He expired on postoperative second day due to right heart failure and hypoxia.d hypoxia.

원문보기
11

기계판막 치환후 발생한 혈전증 3례 보고

문준호

[Kisti 연계] 대한흉부외과학회 대한흉부외과학회지 Vol.27 No.12 1994 pp.1031-1035

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Mechanical valve thrombosis is a serious and potential lethal complication unless early diagnosis & prompt therapy are made. We have been experienced 3 cases of valve thrombosis. From Aug. 1988 to July 1994, reoperations of mitral valve replacement [MVR] with mechanical prostheses [all mitral] were performed in three patients[2 men, 1 woman] due to valve thromboses. All three patients were diagnosed by means of cineradiography. Preoperative status of was shock status and he was applied intra-aortic balloon pump [IABP]. All three cases of prosthetic valve failure [PVF] were treated by Redo-MVR. Time intervals of reoperations were 5months, 40months, and 35months, respectively. In all cases, valve thromboses were excised successfully. Cineradiography provided an accurate diagnosis in all cases, which was utilized as safe, reliable & noninvasive imaging modalities. There were no operative death & complication. All three patients were fully recovered and returned to their employements, and active lives.

원문보기
12

약년자 [40세 미만] 폐암 수술증례의 임상적인 검토

문준호

[Kisti 연계] 대한흉부외과학회 대한흉부외과학회지 Vol.26 No.11 1993 pp.861-865

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The lung cancer in patients under 40 years old is rare and reported to be more rapidly fatal than in older persons. We reviewed the records of 18 cases who younger than 40 years with histologically proven lung cancer between 1959 and 1992 at department of Thoracic Surgery in National Medical Center. There were 12 male and 6 female patients. Two male and all female patients had never smoked. The 17 cases had respiratory symptoms for a mean duration of 3 months. The squamous carcinoma was found in 7 cases[38.9%], small cell carcinoma in 4 cases[22.2%], mixed cell carcinoma in 4 cases[22.2%], adenocarcinoma in 2 cases[11.1%] and bronchoalveolar cell carcinoma in 1 case. Among the 6 resected tumors, one case was stage I, two cases were stage II and three cases were stage IIIa. The operation was considered complete and curative in 6 patients and noncurative in 6 pations because of an exploratory thoracotomy. We conclude that lung cancer in young persons is virulent and that diagnosis is frequently delayed.

원문보기
13

누설전자파 측정을 위한 초광대역 로그주기 안테나의 소형화

최동훈, 김태형, 문준호, 육종관

[Kisti 연계] 한국전자파학회 The journal of Korea Electromagnetic Engineering Society Vol.28 No.10 2017 pp.761-768

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본 논문에서는 안전한 전파 환경의 구현과 전자파적합성(Electromagnetic Compatibility: EMC) 문제를 해결하기 위한 초광대역 로그주기 다이폴 안테나의 소형화를 연구하였다. 또한 고주파 대역에서 신호 대 잡음비를 개선하기 위해 안테나에 발룬(balun)을 부착하여 차동 모드인 안테나와 단일 모드인 동축 케이블의 동작을 안정화 하였다. 제안한 안테나의 소형화와 대역을 증가시키기 위해 4 GHz 이하의 공진 주파수 대역에는 fat 다이폴 구조를 사용했으며, 4 GHz 초과의 공진 주파수 대역에서는 일반적인 다이폴 형태를 사용하였다. 제안한 안테나의 대역폭은 0.6~8.0 GHz이고, 비 대역폭이 12.3 : 1이다. 측정된 최대 이득은 5.7~9.1 dBi을 나타내며, 반 전력 빔폭은 $29.4^{\circ}{\sim}100.2^{\circ}$인 지향성 안테나이다.
In this paper, to implement the electromagnetic wave environment and solve electromagnetic compatibility(EMC) problem, miniaturization of ultra-wide band log periodic dipole antenna for measurement was investigated. In addition, in oder to improve the signal-to-noise ratio in high frequency band, balun was connected to the antenna to stabilize the operation of the differential mode antenna and the single mode coaxial cable. To minimize the total size and to increase bandwidth of the antenna, a fat dipole structure was used for the resonance frequency band below 4 GHz and a general dipole shape was used for that above 4 GHz. The bandwidth of the proposed antenna was represented from 0.6 GHz to 8.0 GHz with a ratio bandwidth of 12.3 : 1. Measured peak gain varies from 5.7 dBi to 9.1 dBi, and a half power beamwidth was presented from $29.4^{\circ}$ to $100.2^{\circ}$ in operating range.

원문보기
14

시츄에서 발견된 위확대염전

문준호, 김현아, 류민옥, 장민, 지서연, 이인형, 윤정희, 최민철, 윤화영, 이병천, 장구

[Kisti 연계] 한국임상수의학회 Journal of veterinary clinics Vol.32 No.3 2015 pp.255-258

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위확대염전 (gastric dilatation and volvulus; GDV)는 위급하고 생명을 위협하는 질병으로 보통 대형견에서 호발한다. 하지만 17살 Shih-tzu (4 kg, 중성화 암컷)가 급성 위확대염전으로 응급내원한 경우가 있었다. 내원했을 당시 지속적인 헛구역질, 무기력, 그리고 과도하게 확장된 복부가 관찰되었다. 신체검사상 환자는 저체온증 ($36.5^{\circ}C$), 심박수 항진 (240 bpm), 느려진 모세혈관 재충만 시간 (> 2초)였고 점막은 창백한 색이었다. 폐음은 정상적이었지만 3단계의 murmur를 청진상 확인하였다. 복부타진을 통해서 복부 양쪽으로 공명하는 부위의 존재가 확인되었다. 수축기혈압은 220에서 시작해서 40 mmHg까지 4시간동안 점진적으로 감소하였다. 혈액검사상, blood urea nitrogen (BUN; 29.1 mg/dl)과creatinine (1.6 mg/dl)의 값을 토대로 미약한 질소혈증 상태였다. 혈중 젖산 농도는 (8.13 mmol/l)로 심각하게 증가해있었다. 추가적인 방사선 검사를 통해서 위확대염전을 확인하였다. 위내 압력을 줄이기 위해, 위천공과 비위삽관을 통한 기체와 액체 제거를 실시하는 동안 보조적으로 산소, 열, 수액, 그리고 약물들을 처치하였다. 또한 dobutamine의 정맥내투여에도 불구하고 수축기혈압이 일정하게 유지되지 않았고, 이에 따라 혼수상태에 빠지고 말았다. 환자의 나이와 복지를 고려하여 안락사가 결정되어 생을 마감하였다. 이번 경우는 최종적으로 위확대염전으로 진단되었으며, 이는 Shih-tzu와 같은 소형견에서 보고되는 첫 위확대염전 case라는 점에서 의의가 있다.
Gastric dilatation and volvulus (GDV) is an acute and life-threatening disease most commonly affecting large- and giant-breed dogs. However a 17-year-old Shih-tzu (4 kg, spayed female) was hospitalized for acute GDV. Repeated unproductive retching, lethargy, and excessively enlarged abdomen were observed. Physical examination indicated that the patient had suffered from hypothermia ($36.5^{\circ}C$), tachycardia (240 bpm), slowed capillary refill time (> 2 sec.), and pale mucous membrane. Grade III murmur with normal lung sound was auscultated. Abdominal palpation revealed that tympanic regions existed in both the left and right sides. Systolic blood pressure decreased gradually from 220 to 40 mmHg within 4 hours. In blood analysis, slight azotemia was observed by blood urea nitrogen (BUN; 29.1 mg/dl) and creatinine (1.6 mg/dl). Blood lactate concentration (8.13 mmol/l) was severely elevated. Additionally, dilatation and volvulus of the stomach was observed by radiograph. Supportive oxygen, heat, fluid, and drugs were administered with gastric decompressions (e.g., gastrocentesis and nasogastric tube). However the patient entered into comatose status with uncontrollable systolic blood pressure, despite the administration of dobutamine intravenously. The case was closed by euthanasia, considering welfare and age. We finally diagnosed the patient as a GDV, thus this is the first GDV case report in small-breed dog such as Shih-tzu.

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15

Failure of Reproduction Management in an Inbreeding English Bulldog

김민정, 박솔지, 김건아, 박은정, 문준호, 최지예, 최우재, 이병천, 장구

[Kisti 연계] 한국임상수의학회 Journal of veterinary clinics Vol.30 No.5 2013 pp.384-386

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2년령 암컷 잉글리쉬 불독이 근친 유래의 동결정액을 이용한 인공수정을 위해 내원하였다. 배란 후 이틀 뒤 자궁 내 인공수정을 실시하였다. 정액을 해동 후 컴퓨터 기반의 정액 분석기를 사용하여 평가한 결과, 해동된 정자는 정상 모양을 가지고 있었고 운동성이 89.8%였다. 초음파와 방사선 촬영을 통하여 8마리를 임신한 것을 확인하였고, 인공 수정 후 60일 째 제왕절개를 실시하였다. 8마리의 산자가 안전하게 분만이 되었지만, 모든 산자들에서 심각한 활모양 다리, 구개열, 구순열, 확장된 두부(頭部) 등을 포함한 기형이 관찰되었다.
A two-year-old, female English bulldog was referred for breeding by artificial insemination with frozen semen of male English bulldog, a litter of female bulldog's grandfather. Intrauterine artificial insemination was done two days after the ovulation day. Sperm was evaluated after thawing by computer assisted sperm analyzer, and its motility was 89.8% with normal shape. Pregnancy bearing eight fetuses was diagnosed by ultrasonography and radiography. Cesarean section was performed sixty days after the artificial insemination. Eight pups were delivered with safe, but the entire pup had abnormalities including severe bow-legged malformations, cleft lip, cleft palate, and enlarged cranial part.

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16

OpenFOAM?을 이용한 공압출기 다이 내부 유동 모사 및 가시화에 관한 수치 연구

문준호, 김주현, 문상호, 김시조

[Kisti 연계] 한국가시화정보학회 한국가시화정보학회지 Vol.11 No.3 2013 pp.5-11

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It is of great importance to obtain the uniform layer thickness in the multi-layer co-extrusion processes. In the present study, the three-dimensional numerical simulation was carried out using the open source code named OpenFOAM(R) to understand the flow characteristics in the multi-layer die. In this numerical study, Multi-thin-layers were successfully computed depending on the number of repeating units. The generation mechanism for the multi-layer was numerically verified by the flow simulation and visualization in the co-extrusion die using OpenFOAM(R). The results suggested that the multi-layer has a divided and folded mechanism similar to the stretching and folding in the chaotic flow.

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17

데이터베이스 기반 GPS 위치 보정 시스템

문준호, 최혁두, 박남훈, 김종희, 박용운, 김은태

[Kisti 연계] 한국로봇학회 로봇학회논문지 Vol.7 No.3 2012 pp.205-215

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A GPS sensor is widely used in many areas such as navigation, or air traffic control. Particularly, the car navigation system is equipped with GPS sensor for locational information. However, when a car goes through a tunnel, forest, or built-up area, GPS receiver cannot get the enough number of satellite signals. In these situations, a GPS receiver does not reliably work. A GPS error can be formulated by sum of bias error and sensor noise. The bias error is generated by the geometric arrangement of satellites and sensor noise error is generated by the corrupted signal noise of receiver. To enhance GPS sensor accuracy, these two kinds of errors have to be removed. In this research, we make the road database which includes Road Database File (RDF). RDF includes road information such as road connection, road condition, coordinates of roads, lanes, and stop lines. Among the information, we use the stop line coordinates as a feature point to correct the GPS bias error. If the relative distance and angle of a stop line from a car are detected and the detected stop line can be associated with one of the stop lines in the database, we can measure the bias error and correct the car's location. To remove the other GPS error, sensor noise, the Kalman filter algorithm is used. Additionally, using the RDF, we can get the information of the road where the car belongs. It can be used to help the GPS correction algorithm or to give useful information to users.

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18

1.2V 10b 500MS/s 단일채널 폴딩 CMOS A/D 변환기

문준호, 박성현, 송민규

[Kisti 연계] 대한전자공학회 電子工學會論文誌. Journal of the Institute of Electronics Engineers of Korea. SD, 반도체 Vol.48 No.1 2011 pp.14-21

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본 논문에서는 LTE-Advanced, Software defined radio(SRD)등 4G 이동통신 핵심기술에 응용 가능한 10b 500MS/s $0.13{\mu}m$ CMOS A/D 변환기(ADC)를 제안한다. 제안하는 AD는 저전력 특성을 만족하기 위해 특별한 보정기법을 포함하지 않는 단일 채널 형태로 설계되었으며, 500MS/s의 고속 변환속도를 만족하기 위해 폴딩 신호처리 기법을 사용하였다. 또한 하위 7b ADC의 높은 folding rate(FR)을 극복하기 위해 cascaded 형태의 폴딩 인터폴레이팅 기법을 적용하였으며, 폴딩 버스에서 발생하는 기생 커패시턴스에 의한 주파수 제한 및 전압이득 감소를 최소화하기 위해 folded cascode 출력단을 갖는 폴딩 증폭기를 설계하였다. 제안하는 ADC는 $0.13{\mu}m$ lP6M CMOS 공정으로 설계되었으며 유효면적은 $1.5mm^2$이다. 시제품 ADC의 INL, DNL은 10b 해상도에서 각각 2.95LSB, 1.24LSB 수준으로 측정되었으며, 입력주파수 9.27MHz, 500MHz의 변환속도에서 SNDR은 54.8dB, SFDR은 63.4dBc의 특성을 보인다. 1.2V(1.5V)의 전원전압에서 주변회로를 포함한 전체 ADC의 전력소모는 150mW ($300{\mu}W/MS/s$)이다.
A 10b 500MS/s $0.13{\mu}m$ CMOS ADC is proposed for 4G wireless communication systems such as a LTE-Advanced and SDR The ADC employs a calibration-free single-channel folding architecture for low power consumption and high speed conversion rate. In order to overcome the disadvantage of high folding rate, at the fine 7b ADC, a cascaded folding-interpolating technique is proposed. Further, a folding amplifier with the folded cascode output stage is also discussed in the block of folding bus, to improve the bandwidth limitation and voltage gain by parasitic capacitances. The chip has been fabricated with $0.13{\mu}m$ 1P6M CMOS technology, the effective chip area is $1.5mm^2$. The measured results of INL and DNL are within 2.95LSB and l.24LSB at 10b resolution, respectively. The SNDR is 54.8dB and SFDR is 63.4dBc when the input frequency is 9.27MHz at sampling frequency of 500MHz. The ADC consumes 150mW($300{\mu}W/MS/s$) including peripheral circuits at 500MS/s and 1.2V(1.5V) power supply.

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19

데이터변환기 설계기술 현황 및 전망

문준호, 송민규

[Kisti 연계] 대한전자공학회 電子工學會誌 Vol.37 No.10 2010 pp.17-28

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20

Offset Self-Calibration 기법을 적용한 1.2V 7-bit 800MSPS Folding-Interpolation A/D 변환기의 설계

김대윤, 문준호, 송민규

[Kisti 연계] 대한전자공학회 電子工學會論文誌. Journal of the Institute of Electronics Engineers of Korea. SD, 반도체 Vol.47 No.3 2010 pp.18-27

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본 논문에서는 offset self-calibration 기법을 적용한 7-bit 1GSPS folding-interpolation A/D 변환기를 제안한다. 제안하는 A/D 변환기는 folding rate 2, interpolation rate 8의 1+6 구조로 고속 동작에 적합하게 설계되었다. 또한 offset self-calibration 회로를 설계하여 공정 mismatch, 기생 저항, 기생 캐패시턴스 등에 의한 offset-voltage의 변화를 감소시켜 A/D 변환기의 성능 특성을 향상 시켰다. 제안하는 A/D 변환기는 1.2V 65nm 1-poly 6-metal CMOS 공정을 사용하여 설계 되었으며 유효 칩 면적은 $0.87mm^2$, 1.2V 전원전압에서 약 110mW의 전력소모를 나타내었다. 측정 결과 샘플링 주파수 800MHz, 입력 주파수 250MHz에서 39.1dB의 SNDR 특성을 보여주었으며, offset self-calibration 회로를 사용 하지 않은 A/D 변환기에 비해 SNDR이 약 3 dB 향상되었다.
In this paper, a 1.2V 7-bit 1GSPS A/D converter with offset self-calibration is proposed. The proposed A/D converter structure is based on the folding-interpolation whose folding rate is 2, interpolation rate is 8. Further, for the purpose of improving the chip performance, an offset self-calibration circuit is used. The offset self-calibration circuit reduce the variation of the offset-voltage,due to process mismatch, parasitic resistor, and parasitic capacitance. The chip has been fabricated with a 1.2V 65nm 1-poly 6-metal CMOS technology. The effective chip area is $0.87mm^2$ and the power dissipates about 110mW at 1.2V power supply. The measured SNDR is about 39.1dB when the input frequency is 250MHz at 800MHz sampling frequency. The measured SNDR is 3dB higher than the same circuit without any calibration.

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