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12-비트 10-MS/s CMOS 파이프라인 아날로그-디지털 변환기
조세현(Se-Hyeon Cho),정호용(Ho-yong Jung),도원규(Won-Kyu Do),이한열(Han-Yeol Lee),장영찬(Young-Chan Jang) 한국전기전자학회 2021 전기전자학회논문지 Vol.25 No.2
본 논문에서는 영상 처리용 12-비트의 10-MS/s 파이프라인 아날로그-디지털 변환기(ADC: analog-to-digital converter)가 제안된다. 제안된 ADC는 샘플-홀드 증폭기, 3개의 stage, 3-비트 플래시 ADC, 그리고 digital error corrector로 구성된다. 각 stage는 4-비트 flash ADC와 multiplying digital-to-analog ADC로 구성된다. 고해상도의 ADC를 위해 제안된 샘플-홀드 증폭기는 gain boosting을 이용하여 전압 이득을 증가시킨다. 제안된 파이프라인 ADC는 1.8V 공급전압을 사용하는 180㎚ CMOS 공정에서 설계되었고 차동 1V 전압을 가지는 1㎒ 사인파 아날로그 입력신호에 대해 10.52-비트의 유효 비트를 가진다. 또한, 약 5㎒의 나이퀴스트 사인파 입력에 대해 측정된 유효비트는 10.12 비트이다. A 12-bit 10-MS/s pipeline analog-to-digital converter (ADC) is proposed for image processing applications. The proposed pipeline ADC consists of a sample and hold amplifier, three stages, a 3-bit flash analog-to-digital converter, and a digital error corrector. Each stage is operated by using a 4-bit flash ADC (FADC) and a multiplying digital-to-analog converter (MDAC). The proposed sample and hold amplifier increases the voltage gain using gain boosting for the ADC with high resolution. The proposed pipelined ADC is designed using a 180-㎚ CMOS process with a supply voltage of 1.8 and it has an effective number of bit (ENOB) of 10.52 bits at sampling rate of 10MS/s for a 1-Vpp differential sinusoidal analog input with frequency of 1 ㎒. The measured ENOB is 10.12 bits when the frequency of the sinusoidal analog input signal is a Nyquist frequency of approximately 5 ㎒.
박선정(Sun Jung, Park),박순옥(Sun Ok, Park),김태현(Tae Hyeon, Kim),김진욱(Jin Uk, Kim),박영우(Young Woo, Park),우상영(Sang Young, Woo),한수정(Soo Jung, Han),이수정(Soo Jung, Lee),조세현(Se Hyun, Cho),최은영(Eun Young, Choi),박상용(Sa 한국간호연구학회 2019 한국간호연구학회지 Vol.3 No.3
Purpose : The purpose of this study was to examine college students’ awareness of respect for life and their consciousness of respect for life in an attempt to highlight the importance of respect for life. Methods : This is a descriptive research study to investigate the way students who were in their first, second, third and fourth years in college looked at respect for life. The collected interview data on the awareness of the selected college students about respect for life were analyzed according to the procedure of content analysis to find out their definitions of respect for life, the importance of it, Results : when they felt respect for life was needed and how to put it into practice, and 62 significant statements and 17 categories were selected. Given the findings of the study, education on respect for life should systematically be conducted from diverse angles to teach college students the preciousness of life and the importance of respect for it. And this education should focus on finding out, systematizing and internalizing the basis of the thought of respect for life. Conclusion : A school curriculum should be revamped into a curriculum of respect for life, and the content of it should be prepared in detail to instill the thought of respect for life in students in light of their characteristics in each stage.