• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.27 no.11
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• pp.1004-1011
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• 2016

In this paper, we suggested the methodology of analyzing and reconstructing of measured electromagnetic emanations from the Micro Controller Unit(MCU) chip of Universal Serial Bus(USB) keyboard. By analyzing electromagnetic emanations, entered information is found at keystroke and furthermore, information security problems such as personal information leakage and eavesdropping can be arisen. USB keyboards make the radiated signal according to the signal transmission mechanism. Electromagnetic emanations were measured by log periodic antenna and wideband receiver and were analyzed by signal processing algorithm.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.10a
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• pp.288-290
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• 2014

In this paper, Escape and BTA(Bus Turn Around) modes of master bridge IC are implemented, which supports MIPI(Mobile Industry Processor Interface) DSI(Display Serial Interface) standard. MIPI DSI master bridge IC sends RGB data and various commands to display module(slave) in order to test it. The Escape mode is designed to implement LPDT, ULPS and trigger message transmissions. The BTA mode is designed to obtain various status information from slave in reverse direction. Functional simulation results show that the designed Escape and BTA modes work correctly for various conditions defined in MIPI DSI standard.

• Journal of Broadcast Engineering
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• v.24 no.3
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• pp.485-494
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• 2019

A software-driven real-time frequency de-modulator is implemented with the aid of universal-serial-bus (USB) type software defined radio dongle. An analog stereo frequency modulation (FM) broadcast signal is down-converted to the basedband analog signal then converted to digital bit streams in the USB dongle. Computer software such as Matlab, Python, and GNU Radio manipulates the incoming bit streams with the technique of digital signal processing. Low pass filtering, band pass filtering, decimation, frequency discriminator, double sideband amplitude demodulation, phase locked loop, and deemphasis function blocks are implemented using such computer languages. Especially, GNU Radion is employed to realize the real-time demodulator.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.1
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• pp.375-383
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• 2011

Recent advances in digital technology and diversified internet services have resulted in a rapid growth of research on monitering systems using embedded web servers in USN systems. In designing USN systems equipped with wireless sensor modules requiring extra power for heating sensors for their appropriate operations, excessive power consumption introduces inefficiency to the entire system. In this paper, using embedded systems in web environment, we develop a remote-monitoring system with VOC (Volatile Organic Compounds) sensor signal, and propose a real time method of processing sensor-data streams by way of the serial bus from the sensor module in the USN system. The proposed system has an advantage of monitering the harmful gases on real-time basis and can be used semi-permanently by providing the sensor module with power through the serial bus. The harmful gas to be detected by the VOC sensor module is Toluene and the sensor module is composed of TGS-2602 VOC(Volatile Organic Compounds) sensors of FIGARO. The detected signal is transferred to the embedded web server using the RS-485 serial communication device. The proposed remote VOC monitering system is designed to coordinate in such a way that the VOC sensor module and embedded web server (EMPOS-II) work together effectively for real time monitering of harmful gases on the web at any places where the internet is connected.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.1137-1138
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• 2008

The purpose of this study is to implement a landscape lighting system that displays full color video by precisely controlling the R, G, B (Red, Green, Blue) LEDs which have a resolution of 256 each. The system implemented in this study consists of a PC, MASTER, SLAVEs and MODULEs. The PC sets the various landscape lighting displays, and the image files can be sent to the MASTER through a virtual serial port connected to the USB (Universal Serial Bus). The MASTER sends a sync signal to the SLAVE. The SLAVE uses the signal received from the MASTER and the landscape lighting display pattern.

• Proceedings of the KIPE Conference
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• 2002.11a
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• pp.213-217
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• 2002

Power devices for high power drivers that need high switching speed (IGCT, HVIGBT) have been continuously developed. However, serial and parallel connections using several much cheaper, lower power capacity of devices than an expensive high power device are very useful methods in the aspect of cost down and high power application. Even the current and voltage unbalance problem is occurred at each devices. This unbalance characteristics are mainly caused by the differences of physical characteristics of each devices and the line inductance (stray inductance) of bus bars that consist of current path. This paper deals simulation analysis of serial connection of IGCTs and parallel connection of IGCTs using physical model of devices. And also, introduces the method to reduce the voltage and current unbalance problem.

• Journal of the Microelectronics and Packaging Society
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• v.20 no.4
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• pp.69-74
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• 2013

In this paper, the impact of integrating large number of I/O (Input-Output) and Core power Delivery Network (PDN) on a 6 layers Flip-Chip Ball Grid Array (FCBGA) package is investigated. The impact of core induced supply noise on high-speed I/O interfaces, and high-speed I/O interface's supply noise coupling to adjacent high-speed I/O interfaces' jitter impact are studied. Concurrent stress validation software is used to induce SSO noise on each individual I/O interfaces; and at the same time; periodic noise is introduced from Core PDN into the I/O PDN domain. In order to have the maximum coupling impact, a prototype package is designed to merge the I/O and Core PDN as one while impact on jitter on each I/O interfaces are investigated. In order to understand the impact of the Core to I/O and I/O to I/O noise, the on-die noise measurements were measured and results were compared with the original PDN where each I/O and Core PDN are standalone and isolated are used as a benchmark.

• Proceedings of the KIEE Conference
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• 1999.07c
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• pp.1161-1163
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• 1999

This paper presents the new unified power flow controller(UPFC) steady-state model. This is derived from UPFC bus power equations of UPFC Synchronous voltage source model. This is very simple and exact model. This can easily be incorporated in a load flow Program, which is suited for monitoring the Power system state as well as determining the magnitude and phase angle of UPFC serial voltage source.

• 제어로봇시스템학회:학술대회논문집
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• 2002.10a
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• pp.77.4-77
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• 2002

Communicating devices for the seriously disabled using eye-ball movement or some body movement are proposed. The first one is a device to use image processing, whose input signal is eyeball movement, A feature of this device is that the device can be readily realized using a note-book computer with USB (Universal Serial Bus) interface bus. This device is incorporated with a word processing software called Nearly Ladder. The second one is an emergency call switch which is used by a patient who can move his finger slightly. The patients can switch on the emergency switch only by touching a switch with his finger. The essence of this sensor is a touch sensor. The sensor can be realized using onl...

• Journal of IKEEE
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• v.20 no.3
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• pp.333-336
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• 2016

LIN (local interconnect network) is a standard low-speed serial communication protocol, and it was developed as an efficient sub-bus for automotive electronic modules. In this paper, a LIN controller was implemented in Verilog HDL, based on LIN ver. 2.2A. The implemented LIN controller was verified in FPGA, and it can be supplied as an IP to be integrated into SoC system. Its size is about 2,300 gates when synthesized in 0.18um technology.