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배영호,권영규 위덕대학교 부설 전자기술연구소 1997 전자기술연구소 논문집 : 위덕대 Vol.1 No.1
SIS 구조의 CV 특성을 해석하고 이를 이용하여 SOI의 특성을 분석하는 방법을 제안하였다. SIS 구조의 CV 기본 방정식으로부터 매몰산화층의 두께, 계면트랩밀도, 도핑농도를 계산하는 식을 유도하였다. 특히 미드갭 커패시턴스의 개념을 도입함으로써 평탄대역전압이 정의되지 않아서 현재까지 분석하기 어려웠던 매몰산화층 내의 유효산화막전하를 분석할 수 있는 방법을 제시하였다. 산소이온주입법으로 제조된 SIMOX SOI 웨이퍼를 이용하여 실제로 SIS 커패시터를 제조하고 이것의 고주파 및 저주파의 CV 특성을 측정하고 이 결과를 이용하여 각종 파라미터를 추출하였다. The characterization method of SOI structure using SIS CV characteristics was proposed. The parameters of SOI structure were extracted by analyzing the capacitance voltage model of SIS structure. The real SIS capacitor was fabricated using SIMOX SOI wafer. High frequency and low frequency CV characteristics was measured. Analyzing the results, thickness of buried oxide, interface trap densities, doping concentration was obtained. Oxide charges in the buried oxide layer, such as mobile charge, were easily calculated by introducing the midgap voltage concepts.
裵英鎬 慶一大學校 1997 論文集 Vol.14 No.2
This paper describes a constant frequency split resonant converter using half-bridge configuration. In this converter, the leakage inductance of matching transformer can also operated as a resonant componants. Mainly, the operation principal, the merits and demerits of the scheme, and the harmonic of output voltage and inductor current are analyzed with relevant equations. The results of computer simulation and analysis using using PsPice program has stable perfomance in accordance with theoretical analysis.
裵英鎬 慶一大學校 1995 論文集 Vol.11 No.1
This study describes a 1 Φ voltage controlled converter eliminating low frequency harmonics and improving power factor in the AC side. This method is increased the magnitude of fundamental component by symmetrical angle control and eliminated lower order harmonics componants by SPWM. As a result, it reduceds the numder of switching of devices and the switching losses. And also, the power factor is improved.
Microprocessor Speed control system에 依한 D.C Coreless Motor의 速度制御
裵英鎬 慶北工業專門大學 1982 論文集 Vol.19 No.-
The speed control of D.C servomotor was performed by using microprocessors in this paper. The motor used in this paper is D.C coreless motor which has a low-inertia and linear control characterics. The transistor chopper circuit is constituted from the driving circuit. The speed of motor is compared the binary bit counted by photo sensor in the digatal tachometer with the data which is inputed in the accumulator of microprocessors. In this experiment, speed regulation of the motor was 13.6% for open loop system, but speed regulation of the motor was improved approximately 0.2% for the close-loop system with feed back control