• Title/Summary/Keyword: AHDL

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Modeling of Organic Schottky Diodes for Circuit Simulations (회로 시뮬레이션을 위한 유기물 쇼트기 다이오드 모델링)

  • Kim, Hyo-Jong;Baatar, Nyambayar;Kim, Shi-Ho
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.47 no.6
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    • pp.7-12
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    • 2010
  • A semi-empirical organic schottky diode model is proposed for circuit simulation. We have set up a full custom design environment for organic schottky diode circuit using Spectre AHDL, which is widely used commercial EDA tool. We measured frequency response from fabricated rectifier, and it was compared to circuit simulation results using the AHDL model. The frequency response of the fabricated rectifier circuit is not sufficient for 13.56MHz RFID, however, it is enough for 135kHz-band RFID.

A Circuit Simulation Model of Ferroelectric Capacitors and its AHDL Implementation (강유전체 캐패시터의 회로 시뮬레이션 모델과 이의AHDL 구현)

  • Kim, Shi-Ho
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.37 no.10
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    • pp.25-32
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    • 2000
  • We provided a model for accurately computing the Hysteresis characteristics of the ferrelectric thin film capacitors. This model is developed form the semi-empirical ferroelectric model based on the double well harmonic oscillator. We have seen that this model is consistent with physical analysis using the Preisach's hysteresis distribution. This model includes the parameters representing the slope of changing Hysteresis curves and the imprint of ferroelectric capacitors. Besides, we showed that this model could predict accurate sub-hystersis loop by the turning points when the polarities of applied voltage were changed before saturation. The simulation and measurement result showed that this model is well applicable to both PZT and SBT materials. This model has been described by AHDL and successfully implemented into Spectre simulator to provide circuit design environment of commercial CAD tools such as Cadence software.

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PLD Design of LCD Drive Circuit using PC Interface (PC 인터페이스를 이용한 LCD 구동회로의 PLD 설계)

  • Lee, Seung-Ho;Lee, Joo-Hyun
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.16 no.1
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    • pp.67-75
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    • 2002
  • This paper presents a PLD design of Gray Mode Graphic STN LCD drive circuit using PC interface. The proposed LCD drive circuit doesn\`t use microprocessor for the convenience of users. Thus, the LCD drive circuit can transfer efficiently image data created under PC to LCD. The LCD drive circuit which is modelled in schematic capture, AHDL and VHDL is simulated in functionally through the use of ALTERA MAX+PLUS II. Also, timing simulation is performed by ALTERA EPM7192SQC160-15 PLD implementation. The PC interface part have been programmed in MS-Visual C++ 6.0. The validity and efficiency of the proposed LCD drive circuit have been verified by test board. After comparing this LCD drive circuit to specify it was verified that the developed LCD drive circuit showed good performances, such as convenience of users, low cost.

A Study on the Implementation of the TCM DECODER for Next Generation Mobile Communication (차세대 이동통신을 위한 TCM 복호기 구현에 관한 연구)

  • 은도현;최윤석;조훈상;김응배;이순흠
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.5 no.1
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    • pp.41-51
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    • 2001
  • In this paper, we presented that the performance of the TCM(Trellis Coded Modulation) using the Euclidean distance is better than that of the convolutional code using the hamming distance under the same bandwidth efficiency. And the TCM DECODER for next generation mobile communication replacing the using convolutional decoder is implemented. Also, for the implementation of the TCM DECODER, the convolutional decoder and the TCM decoder were made by C-language and simulated under AWGN channel with respect to the hard decision and the soft decision. So we proved that performance of the TCM is better than that of the convolutional code. From this result, TCM DECODER, of which constraint length is 3, 5 or 7 and which use the soft decision method, was implemented using the AHDL(Altera Hardware Description Language) and fortified using the Max+plus H version 8.2 of Altera corporation.

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