• Title/Summary/Keyword: full-information

Search Result 3,671, Processing Time 0.026 seconds

A Selective Current-supplying Parallel A/D Converter (선택적 전류공급구조를 갖는 병렬형 A/D 변환기)

  • Yang, Jung-Wook;Kim, Ook;Kim, Won-Chan
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.18 no.12
    • /
    • pp.1983-1993
    • /
    • 1993

  • A power-reduction technique for full-flash A/D converters is proposed. As the resolution of a full-flash A/D converter increases linearly, the number of comparators increases exponentially. The power dissipation is generally larger than other A/D converter architectures because there are many comparators, and they are operating continuously. In this proposed architecture, only a selected number of conmarators are made to operate instead of activating all the comparators of the full-flash A/D convertor. To determine whichcomparators should be activated, voltage levelfider circuits are used. A new clock driver is developed to suppress the dynamic glitch noise which is fed back into the input stage of the comparator. By using this clock driver, the glitch noise in the current source is reduced to one fourth of that when the typical clock signal is applied. The proposed architecture has been implemented with 1.2 m 5GHz BiCMOS technology. The maximum conversion speed is 350Msamples/s. and dissipates only 900mW.

  • PDF

Development of the Full color LED displays using the control algorithm of histogram distribution (히스토그램 분포 제어가 가능한 풀칼라 LED 디스플레이장치 개발)

  • Ha, Young-Jae;Jin, Byung-Yun;Kim, Sun-Hyung
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.14 no.7
    • /
    • pp.1708-1714
    • /
    • 2010

  • In this paper, the full color LED billboard or a general quality improvement methods of quality gamma correction, brightness, and brightness adjustment, etc., regardless of the overall color of images uniformly bright or dark have been taken care of. The video itself, but simply expressed as a uniform brightness of a certain size, how to adjust the brightness of input video signal does not reflect the characteristics of the entire screen with just a lighter or darker line is only feeling was brought. So, unlike conventional video transmission system with new LED display technology in the histogram analysis of image data is input by the input image data by determining the luminance values of the attributes are reflected, as appropriate based on the histogram of the distribution of brightness values By controlling the LED display is expressed in the uniform image can improve the brightness control, histogram distribution of the image as full color billboards driven processing technology is proposed.

  • https://doi.org/10.6109/jkiice.2010.14.7.1708 인용 PDF KSCI

Usability Evaluation of Aggregator-supplied Full-text Database (수집자공급형 학술정보데이터베이스의 사용성 평가에 관한 연구)

  • Kim, Jong-Ae
    • Journal of Korean Library and Information Science Society
    • /
    • v.40 no.2
    • /
    • pp.223-242
    • /
    • 2009

  • This is an exploratory study targeting initial users to evaluate the usability of an aggregator-supplied full-text database and to analyze the differences in task performance and perceptions based on participant characteristics. The differences in completion time and perceptions on ease of use, terminology, subject categories and satisfaction were analyzed based on the participant characteristics such as Kolb learning style, gender and participation in user instruction on full-text databases. The results indicated that there was a statistically significant difference in completion time based on the Kolb learning style. Also a statistically significant difference was found in perceptions on ease of use and terminology based on gender. However no statistically significant difference was found in perceptions on the usability of the database based on the participation in user instruction.

  • PDF