• Title, Summary, Keyword: on-chip power module

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Energy Saving Type OF-LED Illuminated Display Board System with MPPT and CCVC Algorithms (MPPT 및 CCVC 알고리즘을 적용한 에너지 절약형 OF-LED 광고조명시스템)

  • Lee, Seong-Ryong;Jeon, Chil-Hwan;Lee, Su-Won;Lee, Eun-Chul
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.19 no.2
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    • pp.1-6
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    • 2005
  • This paper studies the OF-LED(Optical Fiber-LED) illuminated display board system for energy saving. The OF-LED illuminated display board system has PV module, batteries, charge 8t discharge system and dynamic full color display controller. Both maximum power point tracker (MPPT) and constant current & constant voltage controls (CCVC) are used to govern the charging system. This system. improves the charging efficiency of battery. The system is compact and operates only by PV except the rainy days when the sun is unfavorable. in the system display control and charging-discharging control by on-chip microprocessor are simultaneously carried out. To verify the unposed system, me simulation and experiment results show the operating characteristics with a laboratory prototype.

Design of 77 GHz Automotive Radar Interferer Generator (77 GHz 차량용 레이다 간섭신호 발생기 설계)

  • Kim, Dong-Kyun;Cui, Chenglin;Kwon, Oh-Yun;Yoon, Chai-Won;Kim, Byung-Sung
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.27 no.9
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    • pp.865-871
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    • 2016
  • This work presents a radar signal interferer to be used for evaluating the mutual interference among automotive radars. The developed interfering signal generator is composed of a reference signal generator and a 77 GHz transmitter. Reference signal generator is made up of commercial chips and board, it can generate various modulated signal such as triangular wave, sawtooth wave and random frequency hopping. The transmitter generates 77 GHz band signal by multiplying modulated reference signal frequency 28 times. Transmitter was fabricated using 65 nm CMOS process, it can operate horn antenna by built in on-chip waveguide feeder. The transmitter exhibited 7.31~8.06 dBm output power over a frequency lock range of 75.6~77 GHz.

Femtosecond-Laser Micromachining of a Thermal Blocking Trench for an Enhanced PLC Variable Optical Attenuator (펨토초 레이저를 이용한 PLC 가변광감쇠기 특성 향상을 위한 열간섭 차단 트렌치 가공 기술)

  • Yoo, Dongyoon;Choi, Hun-Kook;Sohn, Ik-Bu;Kim, Youngsic;Kim, Suyong;Kim, Wanchun;Kim, Jinbong
    • Korean Journal of Optics and Photonics
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    • v.27 no.4
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    • pp.127-132
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    • 2016
  • In this paper, a trench structure was fabricated by femtosecond-laser machining to eliminate thermal crosstalk in a multichannel variable optical attenuator (VOA), to prevent decreasing attenuation efficiency of the VOA. Trenches of a variety of widths and depths were fabricated on the VOA chips by femtosecond-laser processing. After the machining, attenuation according to current change was observed in each VOA chip module with trenches. As a result, we could observe high responsivity of attenuation and low power consumption, and that the heat of each channel barely influenced other channels.

The Implementation of Remote Meter Reading System Using Bluetooth Technology & SkT3 Protocol in CDMA (블루투스와 CDMA의 SMS프로토콜을 이용한 원격 가스 검침 시스템의 구현)

  • 김종현;김영길
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.443-446
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    • 2003
  • This paper implement Remote Meter Reading System which is used Bluetooth and SMS in CDMA. This System propose system which tan detect a total amount of gas, electricity or water without a meterman, at home BlueTooth is a close range wireless communication technology which uses a wireless frequency 2.4GHz and has a high trust and self error correction technology according to a low power consumption quality and a high-speed frequency hopping. This makes get a high trust concerning a data transmission than an existing modem. In addition, though wireless modem is restricted by a minimal of a wireless terminal, it will be possible to coincide with the function of the portable with the low power consumption quality by using Bluetooth. And as the system on a chip of module progresses, the possibility of the small size is present. Nowadays, SMS Protocol in CDMA for have a network function based on PPP in CDMA Phone. The proposed Remote Meter Reading System to get more nobility, efficiency, and have good function. SMS Protocol in CDMA have profits which is low power, low cost, and low microwave output.

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Design of 77 GHz Automotive Radar System (77 GHz 차량용 레이더 시스템 설계)

  • Nam, Hyeong-Ki;Kang, Hyun-Sang;Song, Ui-Jong;Cui, Chenglin;Kim, Seong-Kyun;Nam, Sang-Wook;Kim, Byung-Sung
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.24 no.9
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    • pp.936-943
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    • 2013
  • This work presents the design and measured results of the single channel automotive radar system for 76.5~77 GHz long range FMCW radar applications. The transmitter uses a commercial GaAs monolithic microwave integrated circuit(MMIC) and the receiver uses the down converter designed using 65 nm CMOS process. The output power of the transmitter is 10 dBm. The down converter chip can operate at low LO power as -8 dBm which is easily supplied from the transmitter output using a coupled line coupler. All MMICs are mounted on an aluminum jig which embeds the WR-10 waveguide. A microstrip to waveguide transition is designed to feed the embedded waveguide and finally high gain horn antennas. The overall size of the fabricated radar system is $80mm{\times}61mm{\times}21mm$. The radar system achieved an output power of 10 dBm, phase noise of -94 dBc/Hz at 1 MHz offset and a conversion gain of 12 dB.