• Journal of the Institute of Electronics Engineers of Korea SD
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• v.45 no.2
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• pp.125-129
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• 2008

A low-voltage active CMOS inductor approach, which can improve the quality-factor(Q), is proposed in this paper. A low-voltage active inductor circuit topology with a feedback resistance is proposed, which can substantially improve its equivalent inductance and quality-factor(Q). This proposed low-voltage active inductor with a feedback resistance was simulated by ADS(Agilent) using 0.18um standard CMOS technology. Simulation showed that the designed active inductor had a maximum quality-factor(Q) of 3000 with a 1.5nH inductance at 4GHz

• Proceedings of the KIPE Conference
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• 2007.07a
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• pp.117-119
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• 2007

본 논문에서는 램프가 한개 이상 개방 시 피드백 제어 회로를 동작하지 않도록 하면서, 램프를 보호할 수 있는 개방전압을 출력하는 LCD 백라이트 구동용 인버터 회로도에 관한 것이다. 램프 개방전압 출력을 위한 회로는 램프 전류 피드백 블록, 개방전압시 이상신호를 감지하는 전압 피드백 블록, 램프 개수에 상관없이 최고치 값을 감지하는 블록으로 되어 있다. 전술한 회로가 내장된 인버터는 램프의 개방 시 램프의 개수 상관없이 CCFL의 보호 스펙인 2500V의 개방전압을 출력한다. 이러한 인버터가 내장된 LCD패널은 향상된 안정화 동작을 구현하게 된다.

• The Journal of the Korea institute of electronic communication sciences
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• v.17 no.5
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• pp.913-926
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• 2022

As information is recognized as a core competency of organizations, organizations are increasingly investing in policies and technologies for information security(IS). Recently, as information exposure accidents by people have occurred continuously, interest in IS behaviors of organization insiders is increasing. This study aims to confirm the effect of the IS environment and support structure established by the organization on the intention of individuals to comply with IS. We conducted a survey of employees in organizations with IS policies and tested the hypothesis using the structural equation of AMOS 22.0 and Process 3.1 using 421 samples. As a result of the analysis, authentic leadership and justice climate, which are factors that build an IS environment, and communication and feedback, which are factors supporting IS compliance, have a positive effect on employees' compliance intention. In addition, authentic leadership, punishment, communication, and feedback were found to reinforce the positive impact of IS justice climate. As the study suggested the overall structural design direction to be pursued to reinforce insider's IS behavior, and the results help to achieve the IS goal.

• Proceedings of the KAIS Fall Conference
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• 2007.05a
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• pp.143-146
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• 2007

컴퓨터 네트워크에서 전송제어 프로토콜 상에서 다중시간 간격으로 혼잡제어의 지연을 피드백 루프의 시간간격을 조정하여 명시적 예측을 실행해 제어의 단점을 개선하는데 연구한다. 먼저 TCP의 모둘 형 확장에서 Tahoe, Reno, Vegas등 다양한 버전의 TCP에 적용되는 간단한 인터페이스를 통한 함수 호출을 정의하고, 이것이 성능을 크게 향상시는 것을 입증한다. 두 번째로, 광대역 WAN에서 지연-대역폭의 곱이 높을 경우 더욱 심각해지는 사후 제어의 불확실성 차이를 해소함으로써 MTS TCP가 기반 피드백 제어에 사전성을 부여한다는 것을 입증한다. 세번째는 트래픽 제어의 3가지 차원인, 즉 추적 능력, 연결 지속 기간, 공정성이 성능에 미치는 영향 등을 비교 분석하여 입증한다.

• Proceedings of the KAIS Fall Conference
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• 2006.11a
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• pp.180-185
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• 2006

자기 유사성(self-similarity)은 다양한 네트워크 환경에서 공통적으로 발생하는 현상인 것으로 정체 제어에서 자기 유사성 트래픽의 장거리 상관 구조를 활용할 가능성과 MTS(Multiple Time Scale) 정체 제어의 프레임워크를 발전시켜, 이 프레임워크가 전송 율 기반 피드백 제어의 성능을 향상시키는 데 시뮬레이션을 통해 트래픽 조건으로 다음과 같이 연구한다. 자기유사성 트래픽 조건에서 3가지 단계로 구성한다. 먼저 TCP의 모듈 형 확장에서 Tahoe, Reno, Vegas등 다양한 버전의 TCP에 적용되는 간단한 인터페이스를 통한 함수 호출을 정의하고, 이것이 성능을 크게 향상시는 것을 입증한다. 두 번째로, 광대역 WAN에서 지연-대역폭의 곱이 높을 경우 더욱 심각해지는 사후 제어의 불확실성 차이를 해소함으로써 MTS TCP가 기반 피드백 제어에 사전성을 부여한다는 것을 입증한다. 세번째는 트래픽 제어의 3가지 차원인, 즉 추적 능력, 연결 지속 기간, 공정성이 성능에 미치는 영향 등을 비교 분석하여 입증한다.

• Journal of IKEEE
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• v.24 no.4
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• pp.1162-1166
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• 2020

In this paper Low Drop-Out (LDO) regulator that improved load regulation characteristics due to the feedback detection structure. The proposed feedback sensing circuit is added between the output of the LDO's internal error amplifier and the input of the pass transistor to improve the regulation of the delta value coming into the output. It has a voltage value with improved load regulation characteristics than existing LDO regulator. The proposed LDO structure was analyzed in Samsung 0.13um process using Cadence's Virtuoso, Spectre simulator.

• Korean Business Review
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• v.19 no.2
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• pp.23-46
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• 2006

In modern economic societies, individuals are governed by organizations and they managed their daily lives in one way or another. through such organizations. All activities of the organizations are carried out by the job performance of individuals. Job is a very important factor for both individuals and organizations. The study is the explore. the effect of job characteristics and organizational characteristics on the job satisfaction in the small- and medium- sized firms in Namdong und Banwool Area. Job characteristics and organizational justice were hypothesized to be positively related to job satisfaction. To examine the influence of job characteristics and organizational justice on job satisfactions, data were collected from 320 employees of the small- and medium- sized manufacturing companies in Namdong und Banwool Area. This research took independent variables as the core job characteristics of the job characteristic theory such as skill variety, job stagnation, job importance, autonomy, feed back, and organizational justice as distributive and procedural justice. As a result, I can make the following suggestions. First, The Results show that job characteristics and organizational justice were significant and important predictors of job satisfaction. Secondarily, to raise the job desire of organizational members, job must be designed in such a way that the members can highly recognize their job characteristics.

• The Transactions of the Korea Information Processing Society
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• v.5 no.5
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• pp.1311-1319
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• 1998

The methods of providing available bandwidth adaptively using feedback to maximize the utilization of network as well as the quality of service have been the focus of recent research activities for ATM(Asynchronous Transfer Mode). This study has been extended from the point-to-point connection to a point-to-multipoint environment as the number of applications requiring multicast service increases. It is known that the effectiveness of feedback based congestion control scheme diminishes as propagation delay increases. Especially for a multicast connection consisting of various paths and destinations with different performance and congestion status, the problem of unfairness due to different propagation delays may occur. The degree of such unfairness may change depending on various aspects of congestion control schemes. These has been, however, relatively little study on these problems. In this paper, we present how various aspects of control schemes-length of the interval between feedback generations, point of time to coalesce feedback cells from child paths, decreasing factor of source rate in case of congestion-affect the degree of unfairness. Simulation results show that degree of unfairness changes according to when the feedback coalescing happens. Expecially it is shown that the effect of feedback coalescing time to the degree of unfairness is more significant for the smaller feedback interval. It is also found that as the source rate decreasing factor becomes larger the average ACR(Allowed Cell Rate) at the source gets lower and the degree of unfairness grow larger.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2007.04a
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• pp.349-352
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• 2007

본 논문은 계층적 공정 경쟁 유전자 알고리즘(Hierarchical Fair Competition-based Genetic Algorithms : HFCGAs)을 이용한 회전형 역 진자 시스템의 최적 2-자유도 제어기 설계를 제안한다. 비선형이며 불안정한 운동을 하는 회전형 역 진자 시스템은 회전지렛대(rotating arm) 위의 폴(pole)이 적당한 제어력이 없는 상황에서 중력에 의해 어느 한 쪽 방향으로 넘어지려고 할 때, 외부에서 회전지렛대에 힘을 가하여 회전지렛대의 특정위치와 폴의 각도를 유지시키는 시스템으로, 본 논문에서는 두 개의 피드백 제어루프를 갖는 2-자유도 제어기를 구성한다. 각각의 제어기는 PD 제어기로 구성하고, 조기수렴 문제를 내재하고 있는 기존의 유전자 알고리즘의 해결방안중 하나인 HFCGAs를 이용하여 최적의 제어기 파라미터들을 구한다. 마지막으로 실제 공정에 적용하여 설계된 제어기의 성능을 평가한다.

• Journal of IKEEE
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• v.17 no.3
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• pp.267-274
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• 2013

This paper presents a design of LLC resonant converter IC for LED backlight unit based on PFM/PWM dual-mode feedback. Dual output LLC resonant architecture with a single inductor is proposed, where the master output is controlled by the PFM and slave output is controlled by the PWM. To regulate the master output PFM is used as feedback to control the frequency of the power switch. On the other hand, PWM feedback is used to control the pulse width of the power switch and to regulate the slave output. This chip is fabricated in 0.35um 2P3M BC(Bipolar-CMOS-DMOS) Process and the die area is $2.3mm{\times}2.2mm$. Current consumptions is 26mA from 5V supply.