• 전기의세계
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• v.33 no.9
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• pp.540-549
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• 1984

본고의 내용은 다음과 같다. 1. 최근의 DSP 1.1 NEC의 .mu.PD7720 1.2 TI의 TMS32010 1.3 HITACHI의 HD61810B 2. 검토

• Photonics industry news
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• s.5
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• pp.46-49
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• 2001

• Journal of Korean Electronics
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• v.24 no.9
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• pp.54-57
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• 2004

• Proceedings of the Korea Association of Crystal Growth Conference
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• 1996.06a
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• pp.325-350
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• 1996

• Journal of Korean Electronics
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• v.17 no.10
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• pp.66-71
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• 1997

• Proceedings of the Korean Vacuum Society Conference
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• 2002.02a
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• pp.47-47
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• 2002

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.10a
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• pp.304-308
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• 2003

In this paper, two-stage low noise amplifier(LNA) for 24GHz is designed and fabricated using NE450284C HJ-FET of NEC CO. In order to get noise figure and input VSWR to be wanted, it is considered input VSWR and noise figure simultaneously in matching-circuit designing. The fabricated two-stage low noise amplifier has the gain of 16.6dB, input VSWR of 1.6, and output VSWR under 1.5.

• 한국정보디스플레이학회:학술대회논문집
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• 2002.08a
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• pp.732-735
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• 2002

By forming lens-like shapes on the electrode surfaces in OLEDs, the external quantum efficiency is enhanced. The external quantum efficiency of the proposed structure can be much more increased compared to that of the flat structure by decreasing the length of major axis and increasing the length of minor axis for the lens-like shapes.

• Journal of electromagnetic engineering and science
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• v.2 no.2
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• pp.81-86
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• 2002

This paper presents the full wave analysis of microwave circuits with nonlinear device using the finite difference time domain method. The equivalent current source is used to model nonlinear device and all the electric field components at the nonlinear device are updated by FDTD algorithm. The currents and voltages of nonlinear device are calculated by the state equations and iteration method. To validate the proposed method, the S-parameters of NEC NE72089 MESFET in various conditions are analyzed and the results are compared with those of the ADS. The proposed method is applied to the analysis of a microwave amplifier, which includes NEC NE72089 MESFET. The analysis results obtained by the present method show good agreement with those of the ADS.

• English Language & Literature Teaching
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• v.8 no.1
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• pp.241-259
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• 2002

The purpose of this paper is to analyze the recent trends of the development of the English textbooks in EFL situation. The 7th National English Curriculum(NEC) in 2001 which emphasized the curriculum-centered school education have had much influence on the traditional textbook-centered school education in Korea. According to the paradigmatic change of school education, the contents of the English textbooks were changed into the new types of students-centered classroom activities. For students' communicative activities, the English textbooks were developed by two types of syllabuses: process-oriented syllabus and product-oriented syllabus. The 7th NEC includes procedural syllabus and task-based syllabus as well as grammatical- structural syllabus and notional-functional syllabus. In short, unlike the English textbooks in former curriculums, learners' classroom activities and tasks have been emphasized in those to foster their communicative competence.