• 한국멀티미디어학회논문지
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• 제10권10호
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• pp.1260-1270
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• 2007

테스트 기술자들에게 아날로그 회로(또는 혼합신호 회로)의 테스트와 진단은 여전히 어려운 문제여서 이를 해결할 수 있는 효과적인 테스트 방법이 크게 요구된다. 본 논문에서는 time slot specification(TSS) 기반의 내장 전류감지기(Built-in Current Sensor)를 이용한 새로운 아날로그 회로의 테스트 기법을 제안한다. 또한 TSS에 기반 하여 고장 위치를 찾아내고 고장의 종류를 구별해 내는 방법을 제시한다. TSS 기법과 함께 제안하는 내장 전류감지기는 높은 고장 용이도와 높은 고장 검출을 그리고 아날로그 회로내 강고장과 약고장에 대한 높은 진단율을 갖는다. 제안하는 방법에서는 주출력과 전원단자등을 테스트 포인트로 사용하고 전류감지기를 자동 테스트 장치(Automatic Test Equipment)에 구성하므로써 테스트 포인트 선택과정의 복잡도를 줄일 수 있다. 내장 전류 감지기의 디지털 출력은 아날로그 IC 테스트를 위한 내장 디지털 테스트 모듈과 쉽게 연결된다.

• JSTS:Journal of Semiconductor Technology and Science
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• 제2권3호
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• pp.226-232
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• 2002

This paper explains a technique to improve the fault coverage of oscillation-test [1-5] for linear analog circuits. The transient behavior of the virtual ground is monitored during oscillation to extract information of the circuit. The limitation of the oscillation-test is analyzed, and an efficient signature analysis technique is proposed to maximize the fault coverage. The experimental result proves that the parametric fault coverage can be significantly increased by the proposed technique.

• 대한임베디드공학회논문지
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• 제4권1호
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• pp.23-28
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• 2009

Testing of analog(and mixed-signal) circuits has been a difficult task for test engineers and effective test techniques to solve these problems are required. This paper develops a new technique which increases fault detection and diagnosis rates for analog circuits by using extended MTSS (Modified Time Slot Specification) technique based on MTSS proposed by the author. High performance current sensors with digital outputs are used as core components for these techniques. A fault diagnosis structure with minimal hardware overhead in ATE is also described.

• ETRI Journal
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• 제32권1호
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• pp.154-156
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• 2010

Oscillation-based testing of analog-to-digital converters represents a viable option for low-cost built-in self-testing in mixed-signal design. While numerous papers have addressed implementation issues, little attention has been paid to the measurement accuracy. In this letter, we highlight an inherent measurement uncertainty which has to be considered when deriving the parameters from the oscillation frequency.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 춘계학술대회 논문집
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• pp.432-437
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• 2002

DSPA311(Analog Subscriber Line Board Assembly) is offer the interface of between analog subscriber and TDX-100 exchange system. DSPA311 is belong ASI block, accommodate dial and MFC telephone subscriber of 32 channel, and voice signal designed for interface with TSW, and 2 and 4 wire loop impedance is 600 (ohm). DSPA311 is consist 4 channel daughter beard QSLM-10(Quad Subscriber Line Module-10) and perform BORSCHT and be possible A/U-law select and GAIN value control by data control of DSPA171(Device controller I). In this Paper, We described the function test program for the DSPA311 Board by using the HP3070CT combinational test system, and an unmanned automatic test system.

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 2004년도 한국우주과학회보 제13권2호
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• pp.308-311
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• 2004

This paper describes design, implementation and functional test of on-board flight analog video system. Video system is the part of the telemetry system as a means of providing flight vehicle's image data. Adopting analog video transmission technique, we could design and test the system in a short time and implement the prototype model with simpler circuits. As results of the functional test, we have made the verification and validation of two cameras' switching in time, and frequency modulation and demodulation of NTSC color signals successfully.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.1304-1308
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• 2005

This paper presents the case that the existing analog control systems were retrofitted with digital DCS(Distributed Control System)s for boiler unit in thermal power plant. Replacement of existing worn-out or obsolete analog control systems has been considered. Replacement of existing analog control systems with another analog control systems has lots of difficulties in maintaining the systems due to being out of stock. Due to those difficulties, existing analog control systems have been retrofitted with digital DCSs in many industrial sites. KEPRI(Korea Electric Power Research Institute) accomplished the project that retrofitted analog control systems with the developed DCSs for boiler unit in middle-scale coal-fired thermal power plant. The benefits of an upgrade to digital control include a increase of reliability due to system redundancy, ease of modifying the control logic and the parameters of function block, ease of maintenance due to available spare parts, improvement of information display, ease of modifying MMI(Man Machine Interface) displays, a increase in system availability, and improvement of control performance. This paper describes how to use the parameters of existing analog controllers, the implementation of digital PID controller, control system configuration for boiler unit in thermal power plant, some boiler control loops, control result during commissioning, and the comparison of boiler characteristic test data after retrofitting with the existing test data.

• IT SoC Magazine
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• 통권19호
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• pp.37-42
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• 2007

이 글은 당사에서 개발 진행한 TDMB,ISDB-T등의 Moblie TV Receiver단의 Analog Front-End SIP들의 Test H/W, S/W제작 경험을 바탕으로 보다 효율적이고 성공적인 SIP 개발이 될 수 있도록 도움을 주고자 기술 하였다.

• 한국컴퓨터정보학회논문지
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• 제25권7호
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• pp.175-182
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• 2020

연속형 분포로부터 얻은 독립적인 p값들을 통합하는 Fisher의 고전적인 방법은 널리 사용되고 있지만 이산형 확률분포로부터 얻은 p값들을 통합하기에는 적절하지 않다. 대신에 유사 Fisher의 통합방법이 이산형 확률분포의 p값들을 통합하는 대안으로 사용된다. 본 논문에서는 첫째, 여러 표본들의 위치검정(Fisher-Pitman 검정과 Kruskal-Wallis 검정) 데이터와 관련된 이산형 확률분포로 부터 퍼뮤테이션 방법에 의해 p값들을 구하고, 둘째로 이 p값들을 유사 Fisher의 통합방법을 이용하여 통합한다. 그리고 Fisher의 고전적인 방법과 유사 Fisher의 통합방법의 결과를 비교한다.

• 한국컴퓨터정보학회논문지
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• 제23권7호
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• pp.99-104
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• 2018

In this paper, we compare Fisher's continuous method with an exact discrete analog of Fisher's continuous method from permutation tests for combining p values. The discrete analog of Fisher's continuous method is known to be adequate for combining independent p values from discrete probability distributions. Also permutation tests are widely used as alternatives to conventional parametric tests since these tests are distribution-free, and yield discrete probability distributions and exact p values. In this paper, we obtain permutation p values from discrete probability distributions using Mann-Whitney test data sets (real data and hypothetical data) and combine p values by the exact discrete analog of Fisher's continuous method.