• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.2025-2026
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• 2008

This study aims to analyze the features of malfunction of an SFC that helps maintain the frequency of static rotation during the operation of a gas turbine in power plants where power generators and controllers have such a complicated structure as a nerve system, by using electric interference with peripheral devices and maintaining acquired data efficiently. Also, in order to track the possibility of malfunction by various surges and noises which may occur in the process of inserting an SFC during the operation of a gas turbine and to prepare protective measures for the possibility, the study intends to offer data for developing a surge protector suited to the features of a section that is supposed to incur the possibility of malfunction.

• Journal of Biomedical Engineering Research
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• v.5 no.1
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• pp.85-92
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• 1984

A new architecture of the Digital Scan Converter (DSC) for the linear-scan ultrasound medical imaging systems is proposed and its hardware implementation is reported. While the conventional DSC merely displays the acquisited data and does nor allow access to the frame memory, it is possible, in the new system, to access to the frame memory for further imaging processing so as to obtain useful information for medical diagnosis. Image processing can be performed either by a special pupose processor, or by VAX 11/780. The system is made to operate asyncronously to increase the frame rate with tags assigned to the data. The proposed DSC was designed to be used without much modification for the sector scan system as well.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.249-254
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• 2008

The objective of this study is the developement of real time automatic incline measurement using high accuracy digital datalogger for safety and maintence of railway construction sites. For the replacement of current 16 bit analog/digital converter, Digital datalogger system using 24 bit analog/digital converter is studied for the first time with in a country. Therefore data communication method and analyzing program of automatic measurement data is developed for the automatic high accuracy digital datalogge system. The results of this study will be using real time automatic incline measurement of railway structures.

• JSTS:Journal of Semiconductor Technology and Science
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• v.15 no.3
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• pp.334-341
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• 2015

This research outlines the design of a HR-TDC (High Resolution Time-to-Digital Converter) for high data rate communication systems using a $0.18{\mu}m$ CMOS process. The coarse-fine architecture has been adopted to improve the resolution of the TDC. A two-stage vernier time amplifier (2S-VTA) was used to amplify the time residue, and the gain of the 2S-VTA was larger than 64. The error during time amplification was compensated using two FTDCs (Fine-TDC) with their outputs. The resolution of the HR-TDC was 0.15 ps with a 12-bit output and the power consumption was 4.32 mW with a 1.8-V supply voltage.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.60 no.2
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• pp.325-329
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• 2011

This paper introduces the 10b 1MS/s SAR ADC with double sampling technique to reduce the power consumption. The SAR ADC is implemented in CMOS 1P8M 65nm technology and occupies 0.11um2. The maximum sampling rate is 1MS/s. The simulated SNDR and SFDR are 55.6dB and 62.7dB at 484kHz input frequency, respectively. The implemented data converter consumes 507uW with 1.2-V supply.

• Journal of Sensor Science and Technology
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• v.19 no.6
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• pp.469-474
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• 2010

This paper presents a 10Gbps CMOS parallel-to-serial converter for transmission of sensor data. A low-noise clock multiplying unit(CMU) and a multiplexer with controllable data sequence are proposed. The transmitter was fabricated in 0.13 um CMOS process and the measured total output jitter was less than 0.1 UIpp(unit-interval, peak-to-peak) over 20 kHz to 80 MHz bandwidth. The jitter of the CMU output only was measured as 0.2 ps,rms. The transmitter dissipates less than 200 mW from 1.5 V/2.5 V power supplies.

• Genomics & Informatics
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• v.8 no.2
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• pp.97-99
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• 2010

To allow for a quick conversion of the proprietary sequence data from various sequencing platforms, sequence format conversion toolkits are required that can be easily integrated into workflow systems. In this respect, a format conversion tool, as well as quality conversion tool would be the minimum requirements to integrate reads from different platforms. We have developed the Pyrus NGS Sequencing Format Converter, a simple software toolkit which allows to convert three kinds of Next Generation Sequencing reads, into commonly used fasta or fastq formats. The converter modules are all implemented, uniformly, in Java GUI modules that can be integrated in software applications for displaying the data content in the same format.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2001.11b
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• pp.633-639
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• 2001

This paper proposes a knowledge-based expert system. which is assembled into hardware organized with sensor module. AID converter, USB. data acquisition PC and software composed of monitoring and diagnosis module combined with a frame-based method using Sohre's chart and a rule-based method. Vibration signals using various sensors are acquired by AID converter. transferred into PC and processed to obtain a continuous monitoring of the machine status displayed into several plots. Through combining frame-base which covers wide vibration causes with rule-base which gives relatively specified diagnosis results, high accuracy of fault diagnosis can be guaranteed and knowledge base can be easily extended by adding new causes or symptoms. Some examples using experimental data show the good feasibility of the proposed algorithm for condition monitoring and diagnosis of industrial rotating machinery.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.1006-1011
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• 2008

The objective of this study is the developement of real time automatic dynamic measurement using high accuracy digital datalogger for safety and maintence of railway construction sites. For the replacement of current 16 bit analog/digital converter, Digital datalogger system using 24 bit analog/digital converter is studied for the first time with in a country. Therefore data communication method and analyzing program of automatic measurement data is developed for the automatic high accuracy digital datalogger system. The results of this study will be using real time automatic dynamic measurement of railway structures.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1986.10a
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• pp.8-11
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• 1986

Data acquisition system is needed in signal analysis and processing by using computer. This paper realizes the high speed data acquisition system by using 8bit, 20MHZ refresh A/D converter and 18 x 64 Byte high speed memory. The high speed data acquisition system provides converted data to IBM-PC XT micro computer.