• The Journal of Korean Institute of Communications and Information Sciences
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• v.17 no.5
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• pp.529-538
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• 1992

Recently, image signal processing techniques for HDTV signal have been drastically developed. This kind of skill improvement on signal processing need specific memory device for video signal. in this paper, data latch scheme which implements CMOS flip-flop to hold Information from in-put strobe and new reading method is devised to attain a proper access time suitable for HDTY signal. Compared with conventional write scheme, data latch method has two procedures to complete write operation : bit line write and storage cell write, enabling concurrent I /0 operation at the same address. Also, fast read access is possible through the method similar to static column mode and the separated read word line.

• Journal of the Korea Society of Computer and Information
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• v.15 no.3
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• pp.37-43
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• 2010

In this study, the multi format 8.4" LCD monitor for broadcasting has been proposed by the simple circuit design and the efficient processing technique. The small sizing technique, the mixed-type video signal processing technique, the emerging skill of multi-format HD signal to one port, the dividing technique between the analog and digital signal, the embedded audio signal developing technique are the key researches of this study. The proposed multi format 8.4" LCD monitor has been focused on the broadcasting field and has been supposed to have the efficiency at that field.

• The Transactions of the Korea Information Processing Society
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• v.5 no.1
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• pp.249-257
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• 1998

다층 인쇄회로기판에서 고속 신호를 정확하고 신속하게 배선 설계하려면, 물리적 설계 규칙과 신호 잡음을 고려한 전기적 설계 규칙을 정립하고, 적용할 신호 검증 도구를 사용하여 신호의 충실성을 검증하여야 한다. 본 논문은 현재 개발 제작되어 동작 중에 있는 HIPSS(High Performance Storage System)보드에 대한 전기적 설계 규칙과 고속 신호의 배선에 따른 일부 고속 신호의 신호 검증 방법을 설명한다. 또한 전기적 설계 규칙을 적용하여 인쇄회로기판을 설계하는 경우, 발생하는 신호 지연, 반사 그리고 누화 등의 신호 잡음을 검증 도구를 이용하여 시뮬레이션 하고, 분석한 결과를 보이며, 수정된 고속 신호의 배선 설계를 확인한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.04b
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• pp.1209-1212
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• 2001

본 논문에서는 PCB(Printed Circuit Board)회로에서 고속 신호들을 전달하는 배선의 특성 및 배선의 요구사항에 의한 설계 규칙과 이론화된 공식은 이용하여 PCB상에 배치되는 부품들간의 배선경로를 추적하여 해당 배선의 특성을 분석하고, 흐르는 신호의 특성 및 해당 신호의 전기/전자적인 시뮬레이션을 수행할 수 있도록 하는 PCB회로의 신호통합 시뮬레이터에 대하여 언급하고 실험을 통하여 시뮬레이션의 타당성을 검증하였다.

• Journal of Satellite, Information and Communications
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• v.8 no.3
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• pp.10-14
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• 2013

In this paper, when applying current-mode circuit design technique showing constant power dissipation none the less operation frequency, to the low power design of dynamic voltage frequency scaling, we introduce the low power current-mode circuit design technique applying MOSFET in sub-threshold region, in order to solve the problem that has large power dissipation especially on the condition of low operating frequency. BSIM 3, was used as a MOSFET model in circuit simulation. From the simulation result, the power dissipation of the current memory circuit with sub-threshold MOSFET showed $18.98{\mu}W$, which means the consumption reduction effect of 98%, compared with $900{\mu}W$ in that with strong inversion. It is confirmed that the proposed circuit design technique will be available in DVFS using a current-mode circuit design.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.33 no.5
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• pp.350-354
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• 2020

In this study, a pressure sensor for each displacement was fabricated based on the silicon-based pressure sensor obtained through simulation results. Wires were bonded to the pressure sensor, and a piezoresistive pressure sensor was inserted into the printed circuit board (PCB) base by directly connecting a micro-electro-mechanical system (MEMS) sensor and a readout integrated circuit (ROIC) for signal processing. In addition, to prevent exposure, a non-conductive liquid silicone was injected into the sensor and the entire ROIC using a pipette. The packaging proceeded to block from the outside. Performing such packaging, comparing simple contact with strong contact, and confirming that the measured pulse wavelength appears accurately.

• Journal of Korea Society of Industrial Information Systems
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• v.4 no.1
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• pp.110-116
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• 1999

In this paper, signal processing is utilized to reduce the computational time which is one of weak point of FDTD(finite difference time domain) method. Compared with the direct FDTD. combination of FDTD and signal processing achieves the same type of accuracy in much shorter time The combination method spends 140 minutes to analyze the frequence characteristics of the microstrip lowpass filter while the direct FDTD consumes about 900 minutes. To verify the obtained results, microstrip lowpass filter is fabricated on dielectric substrate and the measured results are compared with the analyzed results. It is shown that measured results are in good agreement with the theoretical results.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.16 no.9
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• pp.2846-2866
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• 2022

Caenorhabditis elegans exhibits sophisticated chemotaxis behavior through two parallel strategies, klinokinesis and klinotaxis, executed entirely by a small nervous circuit. It is therefore suitable for inspiring fast and energy-efficient solutions for autonomous navigation. As a random search strategy, the Lévy walk is optimal for diverse animals when foraging without external chemical cues. In this study, by combining these biological strategies for the first time, we propose a spiking neural network model for search and contour tracking of specific concentrations of environmental variables. Specifically, we first design a klinotaxis module using spiking neurons. This module works in conjunction with a klinokinesis module, allowing rapid searches for the concentration setpoint and subsequent contour tracking with small deviations. Second, we build a random exploration module. It generates a Lévy walk in the absence of concentration gradients, increasing the chance of encountering gradients. Third, considering local extrema traps, we develop a termination module combined with an escape module to initiate or terminate the escape in a timely manner. Experimental results demonstrate that the proposed model integrating these modules can switch strategies autonomously according to the information from a single sensor and control steering through output spikes, enabling the model worm to efficiently navigate across various scenarios.

• Journal of IKEEE
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• v.2 no.1 s.2
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• pp.34-41
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• 1998

An integrated circuit for magnetic stripe storage system is implemented. All the analog and digital circuits are integrated in one chip. The analog block contains preamplifier, peak detecter, comparator and reference generater. And digital block includes reference window signal generater, up/down counter for F/2F signal measurement, bit-error detection logic, and control logic. Both the encoding and decoding functions for F/2F signal processing are provided. An AGC(automatic gain control) circuit which was included in conventional circuits is eliminated due to optimized circuit design. Misreading prevention circuits are also proposed by fixing up new reference bit when broken bits are detected. The prototype chip is implemented using $0.8{\mu}m$ N-well CMOS technology and operates from 3.3 V to 7.5 V of supply voltage. It occupies a die area of $3.04mm^2(1.6mm{\times}1.9mm)$ and dissipates 8 mW with a 5 V supply voltage.

• Smart Media Journal
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• v.6 no.2
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• pp.26-32
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• 2017

In this paper, we implement a signal-detecting electric circuit based LED lighting control system which is essential in NUI technology using EPIC converting surrounding earth electric field disturbance signals to electric potential signals. We used signal-detecting electric circuits which was developed to extract individual signal for each EPIC sensor while conventional EPIC-based development equipments provide limited forms of signals. The signals extracted from our developed circuit contributed to better performance as well as flexiblity in processes of feature extracting stage and pattern recognition stage. We designed a system which can control the brightness and on/off of LED lights with four hand gestures in order to justify its applicability to real application systems. We obtained faster pattern classification speed not only by developing an instruction system, but also by using interface control signals.