• Journal of the Institute of Electronics Engineers of Korea SD
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• v.41 no.2
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• pp.77-83
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• 2004

Cross-talk noise which can occur between on-chip interconnects is significant factor which influence signal integrity. Therefore, this paper presents an analytical method for estimating maximum cross-talk noise. We consider inductance effect of interconnects and use arbitary ramp inputs to estimate noise magnitude exactly. Also, we have used a virtual source for the easy of analytically caculating maximum cross-talk noise from complex cross-talk noise model. The accuracy of the has been shown that be within 4.3 percent maximum relative error compared with the results of HSPICE simulation. Hence, this study can be utilized in various CAD tools for guaranteeing signal integrity.

• Proceedings of the KIEE Conference
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• 2000.07d
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• pp.3175-3177
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• 2000

전압원과 전류원 및 RLC 수동소자들로 구성된 대형회로망에서 망(網)과 마디를 복합시킨 새로운 회로망 해석법을 제시하였다. 종래의 수식적 유도 과정이 불필요하며 도식적 추출에 의해 대형회로망을 간단히 해석한다 각 전원은 직렬 또는 병렬 임피던스를 반드시 수반하고 있지 않아도 무방하다. 망 설정과 마디 선정 과정에서의 전원 처리에 의해 회로망의 도형화 시켰고, 그로부터 행렬 형태의 부분 식을 도출하였다. 망해석법에 의한 방식과 마디해석법에 의한 기법이 가지전류방향 행렬에 의해 합성된다. 합성된 최종 식은 컴퓨터 몫이다.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.39 no.1
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• pp.55-62
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• 2015

The electromagnetic force induced by an intense electric current pulse, which generates an electromagnetic field around the metal jet originating from a shaped charge, can disperse and scatter the high-speed metal jet. An electric device consisting of an RLC circuit applies an intense electric current pulse that flows in the circuit while the metal jet passes between two electrodes. In this study, the metal jet formation was simulated using the ALE technique in 2-D, and a 3-D finite element model was mapped using 2-D simulation results to induce the electric current directly. The deformed shapes of the metal jet and the electromagnetic force were calculated using a finite element analysis by inducing the electric current directly, and the major parameters of the intense electric current pulse for breaking up the metal jet were examined.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.43 no.12 s.354
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• pp.89-101
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• 2006

Frequency-variant transmission line parameters are determined. Then the signal transient characterizations of frequency-dependent multi-coupled lines are investigated. With the proposed method, an accurate signal integrity degradation such as signal ringing (overshoot, undershoot) and crosstalk noises relevant to the switching patterns of signals, rising / falling time(tr, tf) and line lengths is investigated. It is shown that there may be approximately 26% discrepancy of signal transients and 260% difference of crosstalk noises between the constant RLC model and frequency-variant RLC model in on-chip global interconnects while those of package lines are 11% and 70%, respectively.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.10a
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• pp.918-921
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• 2005

According to the mechanical-electrical coupling characteristics and the electrical Impedance property of resistor-inductor-capacitor(RLC) series resonant circuit, the mechanical impedance analysis of a bimorph piezoceramic patch shunted with a series RLC resonant circuit is conducted. The displacement transfer function of a cantilever beam bonded with a piezoelectric shunt damping module is deduced in the case of single mode vibration of the beam. By the use of vibration damping theory of tuned mass damper system, the parameter optimization of piezoelectric shunt damping system is performed. The optimal resonant state of the shunting circuit can be obtained when the resister and conductor are optimally adjusted. Test results show that the vibration control effect as well improved with optimized piezoelectric shunt system.

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2002.11a
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• pp.468-478
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• 2002

고품질의 영상 압축기인 JPEG2000의 기본 압축 코덱인 EBCOT(Embedded Block Coding With Optimized Truncation)를 설계하였다. 영상 압축기에서 Context 추출 구현을 위하여 코드블록(Code block)으로 분할하고, 비트플랜(Bit-Plane)코딩을 했으며, 3가지 패스 그룹으로 분리한 후 ZC, RLC, MR, SC를 하였다. 산술부호화는 덧셈 연산과 쉬프트 연산만을 사용하는 MQ-coder를 사용하였으며, Context들의 누적 확률을 추정하여 테이블을 작성하였고, 압축데이터를 산출하였다. 영상 압축을 위한 엔트로피 코더의 하드웨어 구현은 VHDL를 이용하여 설계를 하고, Synopsys사의 논리 회로 합성 도구를 사용하여 합성을 하였으며, Altera사의 FLEX 10K250 Device를 이용하여 FPGA로 구현하였다.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2002.11a
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• pp.468-478
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• 2002

고품질의 영상 압축기인 JPEG2000의 기본 압축 코덱인 EBCOT(Embedded Block Coding With Optimized Truncation)를 설계하였다. 영상 압축기에서 Context 추출 구현을 위하여 코드블록(Code block)으로 분할하고, 비트플랜(Bit-Plane)코딩을 했으며, 3가지 패스 그룹으로 분리한 후 ZC, RLC, MR, SC를 하였다. 산술부호화는 덧셈 연산과 쉬프트 연산만을 사용하는 MQ-coder를 사용하였으며, Context들의 누적 확률을 추정하여 테이블을 작성하였고, 압축데이터를 산출하였다. 영상 압축을 위한 엔트로피 코더의 하드웨어 구현은 VHDL를 이용하여 설계를 하고, Synopsys사의 논리 회로 합성 도구를 사용하여 합성을 하였으며, Altera사의 FLEX 10K250 Device를 이용하여 FPGA로 구현하였다.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.7
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• pp.753-759
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• 2014

This paper introduces the reduction design technique of the resonance phenomenon of the inner PCB based on power integrity from the analysis about the inner power supply line generating RLC resonance. With the technique, the resonant frequency resulted from the structural characteristics of the PCB can be analyzed and allows to predict and the capacitor for resonance phenomenon reduction can be decided as a decoupling capacitor. From the simulation result, it was confirmed that the PCB's resonance phenomenon reduction design technique should have the reduction effect in the inner motherboard of the industrial controller. This research will be contributed to the improvement of the safety of a PDN (Power Delivery Network) structure in the layout design technique of the PCB.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.49 no.1
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• pp.8-11
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• 2012

Automated Vision Inspection (AVI) systems automatically detect any defect feature in a surface image. The performance of the system can be measured under a special circumstances such as ultimate defect detection. In this situation, the defect signal level is similar to noise level and it becomes hard to make a solid decision with AVI systems. In this paper, we propose an effective preprocessing technique to enhance SNR (Signal to Noise Ratio). The method is motivated by some principles of HVS (Human Visual System) and RLC (Run Length Coding) techniques is used for this purpose. The proposed preprocessing technique enhances SNR under ultimate defect conditions and improves overall performance of AVI system.

• The Journal of the Korea institute of electronic communication sciences
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• v.11 no.9
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• pp.893-900
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• 2016

Output response for prototype system is analyzed according to the pole locations and the damping ratio changes. The system modeling is constructed for RLC-circuit and the output response is analyzed for both a unit-step and a sinusoidal input. The survey is conducted to estimate the understanding ability on the automatic control. A high understanding ability is shown up in analysing the transfer functions of control system. And improvement is manifest in the ability to understand the output response according to the parameter changes. But some difficulty is revealed in acquiring the output responses in time domain.