• 제목/요약/키워드: Flash Design

검색결과 419건 처리시간 0.024초

A Design of CMOS Subbandgap Reference using Pseudo-Resistors (가상저항을 이용한 CMOS Subbandgap 기준전압회로 설계)

  • Lee, Sang-Ju;Lim, Shin-Il
    • Proceedings of the KIEE Conference
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    • 대한전기학회 2006년 학술대회 논문집 정보 및 제어부문
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    • pp.609-611
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    • 2006
  • This paper describes a CMOS sub-bandgap reference using Pseudo-Resistors which can be widely used in flash memory, DRAM, ADC and Power management circuits. Bandgap reference circuit operates weak inversion for reducing power consumption and uses Pseudo-Resistors for reducing the chip area, instead of big resistor. It is implemented in 0.35um Standard 1P4M CMOS process. The temperature coefficient is 5ppm/$^{\circ}C$ from $40^{\circ}C$ to $100^{\circ}C$ and minimum power supply voltage is 1.2V The core area is 1177um${\times}$617um. Total current is below 2.8uA and output voltage is 0.598V at $27^{\circ}C$.

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Design and Implementation of Embedded Flash Player (내장형 플래시 재생기의 설계 및 구현)

  • Doo, Byoung-Kyun;Bae, Hyeon-Su;Koh, Jeong-Gook
    • Proceedings of the Korea Information Processing Society Conference
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    • 한국정보처리학회 2003년도 추계학술발표논문집 (상)
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    • pp.15-18
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    • 2003
  • 오늘날 우리 사회는 인터넷의 전성기라 불릴 만큼 인터넷이 일상에서 기본이 되고 있다. 이처럼 인터넷에 가까워지는 이유는 정보를 제공하는 수많은 웹사이트가 있기 때문인데 웹 사이트의 광고들은 대부분 플래시를 이용하여 제작되고 있다. 또한 데이터베이스 연동 및 서버 - 클라이언트 기능 지원에서 보듯이 플래시의 기능도 지속적으로 강화되고 있다. 요즘에는 소형 정보기기에서 데스크탑 PC에 이르기까지 다양한 플랫폼에서 활용가능한 플래시 재생기도 출시되고 있다. 이러한 추세에 따라 본 논문에서는 다양한 플래시 컨텐츠를 재생할 수 있는 독립 장비 형태의 전용 플래시 재생기를 설계하고 구현하였다.

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Comparative Study on Various Memristor Models

  • Jeong, Cheol-Mun;Lee, Eun-Seop;Min, Gyeong-Sik
    • Proceedings of the Materials Research Society of Korea Conference
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    • 한국재료학회 2011년도 춘계학술발표대회
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    • pp.244.1-244.1
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    • 2011
  • Memristors have been studied for many years due to better scalability than DRAMs and FLASH memories thus they are considered now as a strong candidate for future memories. To describe the electrical behavior of memristors, various memristor models have been developed. Especially, many kinds of window function have been used to express the non-linearity of memristors which are thought to cause different voltage-current relationships in memristors. In this paper, the previous memristor models with different window functions are compared and analyzed. This comparative study can be very useful in not only understanding the diversity in memristor's electrical behaviors but also developing memristor circuits. This work was financially supported by the SRC/ERC program of MOST/KOSEF (R11-2005-048-00000-0). The CAD tools were supported by the IC Design Education Center (IDEC), Korea.

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Design and Implementation of iSCSI Protocol Based Virtual USB Drive for Mobile Devices (모바일 장치를 위한 iSCSI 프로토콜 기반의 가상 USB 드라이브 설계 및 구현)

  • Choi, Jae-Hyun;Nam, Young Jin;Kim, JongWan
    • IEMEK Journal of Embedded Systems and Applications
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    • 제5권4호
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    • pp.175-184
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    • 2010
  • This paper designs a virtual USB drive for mobile devices which gives an illusion of a traditional USB flash memory drive and provides capacity-free storage space over IP network. The virtual USB drive operating with a S3C2410 hardware platform and embedded linux consists of USB device driver, an iSCSI-enabled network stack, and a seamless USB/iSCSI tunneling module. For performance enhancement, it additionally provides a kernel-level seamless USB/iSCSI tunneling module and data sharing with symbol references among kernel modules. Experiments reveal that the kernel-level implementation can improve the I/O performance up to 8 percentage, as compared with the user-level implementation.

An Effects on Web-based Cooperative Learning to Enhance Social Adaptability to in the Students with Mental Retardation Children (웹 기반 협동학습이 정신지체 아동의 사회적 능력 신장에 미치는 효과)

  • Eom, Kyung-Min;Lin, Chi-Ho
    • The Journal of Information Technology
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    • 제12권4호
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    • pp.33-37
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    • 2009
  • This paper analyzed effects Web-Based cooperation Learning have on improvement in Social Adaptability and problematic behavior, using Web-Based cooperation Learning system that is designed for Mental retardation children. Is Made Teaching Design according to students level, based on elementary school Bareunsaenghwal subject. Teaching and Learning program that is going with flash and PPT Embodied is. Designed to bulletin the evaluation data for cooperation studying after studying a part of the lesson. Verification of learning effect went with experimental group and comparison group consisted of groups of 8. Students studied the Internet web data and Teaching material paper and they took pencil test. As a result, point of post-inspection was higher than that of pre-inspection. Web-Based cooperation Learning is confirmed to be effective on Social Adaptability and problematic behavior improvement.

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Design and Implementation of Hybrid Hard Disk Simulator based on Linux Environment (Linux 기반의 하이브리드 하드 디스크 시뮬레이터 설계 및 구현)

  • Lee, Geun-Hyung;Kim, Deok-Hwan
    • Proceedings of the IEEK Conference
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    • 대한전자공학회 2008년도 하계종합학술대회
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    • pp.649-650
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    • 2008
  • In order to resolve mechanical limit in HDD, recently, the hybrid hard disk combining HDD and a flash memory was launched. In this paper, we propose a simulator for hybrid hard disk which considers redirection, flushing and spin-down function to complement the difference between HDD and hybrid hard disk. The simulator was implemented in linux kernel 2.6.20 by modifying system calls related with file system. The experiment shows that the power consumption of hybrid hard disk is 47% smaller than that of hard disk in laptop PC.

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Design of Charge Pump Circuit with VCO (VCO를 이용한 차지펌프 설계)

  • Chai, Yong-Yoong
    • The Journal of the Korea institute of electronic communication sciences
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    • 제6권1호
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    • pp.118-122
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    • 2011
  • For programming such as writing or erasing of the flash memory, two different kinds of high voltage are required, and the charge pump circuit has been used for this. The charge pump circuit proposed in this paper uses the VCO to adjust the clock frequency in order to match the reference voltage approved from the outside and the charge pump's output. Accordingly, I suggest a circuit that can produce a predictable output, regardless of not only an error by fabrication but also MOSFET's body effect generated in each part of the charge pump.

Design of the Self-Oscillation UV Flash Lamp Power Supply and the Characteristic of its Operation Using Self-resonance of the Transformer (트랜스포머의 자가 공진(Self-Resonance) 특성을 이용한 자가 발진(Self-Oscillation) UV 발생 플래시램프 전원장치설계 및 그 동작 특성)

  • Kim, Shin-Hyo;Cho, Dae-Kweon
    • Journal of Korea Ship Safrty Technology Authority
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    • 통권37호
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    • pp.35-44
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    • 2014
  • 해상 및 육상용 살균방식으로 UV를 사용하는 시스템이 주종을 이루고 있으며, 의료, 생활, 산업용 시스템에 널리 적용되고 있으며, 근래에는 평형수 처리 방식으로 UV를 적용하는 사례가 등장하고 있다. UV 광원으로는 다양한 램프가 있으며 그 중 제논플레시 램프는 강한 섬광형 방전과 함께 다량의 UV를 방출하는 특성이 있어 매우 효과적이다. 다만, 타 광원에 비하여 높은 방전전압으로 인하여 기존의 전원장치 설계 방식으로는 장치의 크기가 크고 복잡한 문제가 있었으며, 이를 개량하기 위한 본 연구에서는 트랜스포머의 자가 공진(self-resonance)을 이용한 설계 기법을 제안하며, 트랜스포머의 특정주파수에서 고유임피던스 성분을 이용하여 출력전압을 필터링하면 제논방전관이 자가 발진방식으로 동작하므로 종래의 회로구성보다 간단하고 경제적인 아크방전 파워 스테이지의 구성이 가능하다.

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Rapid Depressurization Capability of Monobloc Sebim Valves for KNGR Total Loss of Feedwater Event

  • Kwon, Young-Min;Lim, Hong-Sik;Song, Jin-Ho
    • Proceedings of the Korean Nuclear Society Conference
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    • 한국원자력학회 1996년도 추계학술발표회논문집(1)
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    • pp.389-394
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    • 1996
  • The conceptual design of Korea Next Generation Reactor (KNGR), which is 3914 MWt PWR, includes the safety depressurization system (SDS) to comply with U.S. NRC's severe accident policy. In this analysis, it is assumed that three Monobloc Sebim valves are adopted for the SDS bleed valves of KNGR. The characteristic of Monobloc Sebim are modeled in the CE-FLASH-4AS/REM code for this analysis. The various feed and bleed (F&B) procedures with Sebim valves are investigated for total loss of feedwater (TLOFW) event. It is found that if operators open two out of three Sebim valves in conjunction with four HPSI pumps before hot leg temperature reaches saturation condition, the decay heat removal and core inventory make-up function can be successfully accomplished. Therefore, this F&B procedure can be used for mitigating the TLOFW event of the KNGR. This result also demonstrates the feasibility of adopting the Monobloc Sebim valves for the SDS of KNGR.

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Design of a Voltage Synthesizer Using.Microprocessor for Television Channel Selection (마이크로프로세서를 이용한 전압합성방식의 텔리비젼 채널 선국회로 설계)

  • 조진호;이건일
    • Journal of the Korean Institute of Telematics and Electronics
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    • 제17권2호
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    • pp.1-9
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    • 1980
  • A voltage synthesizing channel selection circuit was designed to improve on the conventional vol tape synthesizer which has been memorized each charnel's tuning vol cage itself. In the course of this study, tuning voltage was calculated by channel number entered from 10 keys. Then this circuit has tie function of direct access channel selection and rear display of channel number for the whole range of UHF and VHF, Attention was also given to realize the fine tuning by searching each commended channel, and the sequential selection by using 2keys, and the flash of channel indicator in case of inactive station.

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