• Title/Summary/Keyword: single-poly

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Design of a memory compiler for ASIC (ASIC용 메모리 컴파일러 설계)

  • 김정범;권오형;홍성제
    • Journal of the Korean Institute of Telematics and Electronics C
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    • v.35C no.8
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    • pp.23-32
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    • 1998
  • In this paper, we propose a memory compiler to genrate embedded RAMs and ROMs for ASIC chips. We design the leaf cells to be compsoed of memory blocks. The compiler is built using tile-based method to simplify routing. The compiler can genrate any memory layouts to satisfy 64 to 4096 words and 4 to 256 bits per word. The technology we used here is 0.8.mu.m single poly double metal CMOS process. The address access time and power consumption are verifie dthrough the HSPICE simulation.

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A Five Mask CMOS LTPS Process With LDD and Only One Ion Implantation Step

  • Schalberger, Patrick;Persidis, Efstathios;Fruehauf, Norbert
    • Journal of Information Display
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    • v.8 no.1
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    • pp.1-5
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    • 2007
  • We have developed a CMOS LTPS process which requires only five photolithographic masks and only one ion doping step. Drain/Source areas of NMOS TFTs were formed by PECVD deposition of a highly doped precursor layer while PMOS contact areas were defined by ion implantation. Single TFTs, inverters, ring oscillators and shift registers were fabricated. N and p-channel devices reached field effect mobilities of $173cm^2$/Vs and $47cm^2$/Vs, respectively.

The Analysis of a TFLIM for Electro-magnetic Levitation and Propulsion (자기부상(부(浮上) 및 추진(推進) 겸용 TFLIM의 해석)

  • Jang, Seok-Myeong
    • Proceedings of the KIEE Conference
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    • 1987.11a
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    • pp.37-40
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    • 1987
  • In transverse flux linear induction motors(TFLIM), The loops of the working flux lie in planes transverse to the direction of motion. With a poly-phase primary winding, The TFLIMs has both electro-magnetic propulsion and levitation force. Thus, TFLIM a will be useful in high speed ground transportation systems. In this paper, The characteristics of a single aide TFLIM are analysed by using electromagnetic field theory.

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Controlling Characteristics of a Self-Excited D.C Moter Driven by a Thyristor Chopper (직류 Chopper방식에 의한 직류자격자식 전동기 특성에 대하여)

  • 천희영
    • 전기의세계
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    • v.19 no.3
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    • pp.10-17
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    • 1970
  • The main focus of this paper is the analysis on the controlling characteristics of self-excited D.C. motor driven by thyristor chopper. The controlling characteristics of short shunt compound motor driven by poly phase multiple thyristor chopper is better than that of driven by single phase thyristor chopper. And we got the following conclusions. A. Motor current capacity could be increased by the multiplicity n increase. B. Speed-torque characteristics is linear and adquate for constant Horsepower motor. C. Maximum current Riple ratio is proportional to almost inverse m$^{2}$. Also here shows the stable conditions and semiconducterlize datas for controlling the self-excited D.C. motor driven by thyristor chopper.

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Numerical method to impose constraint conditions in phase transformation (상변태의 구속 조건을 부가하기 위한 수치 방법)

  • Yang, Seung-Yong;Goo, Byeong-Choon
    • Proceedings of the KSME Conference
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    • 2004.04a
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    • pp.706-709
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    • 2004
  • A numerical method was developed that imposes constraint condition on the order parameters in martensitic phase transformation. In the method, an amplitude function having values of 1 or 0 was multiplied to transformation rates. The merit of the method is that the imposition of the constraint condition is more straightforward than a method with Lagrangian multiplier and easy to implement in the tangent modulus method. The developed method is applied to three-dimensional finite element analyses of single and poly crystalline shape memory alloys.

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Implementation of Systolic Array for the Single-Source Shortest Path Problem

  • Lee, Jae-Jin;Park, Jeong-Pil;Hwang, In-Jae;Song, Gi-Yong
    • Proceedings of the IEEK Conference
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    • 2002.07a
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    • pp.361-364
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    • 2002
  • Shortest path problem belongs to the combinatorial optimization problem and plays an important role in the field of computer aided design. It can either be directly applied as in the case of routing or serves as a important subroutine in more complex problems. In this paper, a systolic array for the SSSP(single-source shortest path problem) was derived. The array was modeled and simulated in RTL level using VHDL, then synthesized to a schematic and finally implemented to a layout using the cell library based on 0.35 $\mu\textrm{m}$ CMOS 1-poly 4-metal CMOS technology.

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Single Cell Li-ion Battery Charger (Single Cell Li-ion 전지 충전 IC)

  • Lee, Rock-Hyun;Kim, Jun-Sik;Park, Shi-Hong
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.22 no.7
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    • pp.576-579
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    • 2009
  • This paper suggests a autonomous linear Li-ion battery charger which can safely distribute power between an external power source(AC adapter, auto adapter, or USB source), battery, and the system load. Depending on an external power source's capability, the charger selects proper charging-mode automatically. The charger IC designed and fabricated on Dongbu HITEC's $0.35{\mu}m$ BCD process with layers of one poly and three metals.

Design of Single Ion Conductive Solid Polymer Electrolytes Utilizing the Characteristics of the Boron Atom

  • Matsumi, Noriyoshi;Ohno, Hiroyuki
    • Proceedings of the Polymer Society of Korea Conference
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    • 2006.10a
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    • pp.275-275
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    • 2006
  • A series of organoboron polymer electrolytes were prepared and their ion conductive characteristics was investigated in detail. Alkylborane type polymer electrolytes prepared by hydroboration polymerization exhibited improve lithium transference number due to efficient anion trapping of alkylborane unit. A lithium borate type polymer/salt hybrid was also successfully prepared by dehydrocoupling polymerization of lithium mesitylhydrorate. Ionic conductivity of single ion conductive polymer/salt hybrid was further improved in the case of comb like polymer/boron stabilized imido anion hybrid prepared via polymer reaction of poly(organoboron halide) with hexylamine and PEO monomethylether and subsequent neutralization with lithium hydride.

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Self-organized gradient hole injection to improve the performance of organic light-emitting diodes

  • Lee, Tae-Woo;Chung, Young-Su;Kwon, O-Hyun;Park, Jong-Jin;Chang, Seoung-Wook;Kim, Mu-Hyun
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.1813-1818
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    • 2006
  • We demonstrate a new approach to form gradient hole injection layer (HIL) in organic light-emitting diodes (OLEDs). Single spincoating of hole-injecting conducting polymer compositions with a perfluorinated ionomer results in gradient workfunction through the layer by self-organization, which lead to remarkably efficient single layer polymer light-emitting diodes (PLEDs) (${\sim}21$ cd/A). The device lifetime was significantly improved (${\sim50$ times) compared with the conventional hole injection layer, poly(3,4-ethylenedioxy-thiophene)/polystyrene sulfonate. This solution processed HIL also produced dramatically enhanced luminous efficiency (${\sim}34$ cd/A) in vacuum- deposited green fluorescent OLEDs while the vacuum deposited HIL gave the luminous efficiency of ${\sim}23$ cd/A in the same device structure.

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Hole trapping in carbon nanotube-polymer composite organic light emitting diodes

  • Woo, H.S.;Czerw, R.;Carroll, D.L.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2003.07a
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    • pp.1047-1052
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    • 2003
  • Controlling carrier transport in light emitting polymers is extremely important for their efficient use in organic opto-electronic devices [1]. Here we show that the interactions between single wall carbon nanotubes (SWNTs) and conjugated polymers can be used to modify the overall mobility of charge carriers within nanotube-polymer nanocomposites. By using a unique, double emitting-organic light emitting diodes (DE-OLEDs) structure. we have characterized the hole transport within electroluminescent nanocomposites (nanotubes in poly (m-phenylene vinylene-co-2,5-dioctoxy-p-phenylene) or PmPV). We have shown using this idea that single devices with color tunability can be fabricated. It is seen that SWNTs in PmPV are responsible for hole trapping, leading to shifts in the emission wavelengths. Our results could lead to improved organic optical amplifiers, semiconducting devices, and displays.

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