• Title/Summary/Keyword: single pulse

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Design of an Integrated High Voltage Pulse Generation circuit for Driving Piezoelectric Printer Heads (피에조일렉트릭 프린터 헤드 구동을 위한 집적화된 고전압 펄스 발생 회로의 설계)

  • Lee, Kyoung-Rok;Kim, Jong-Sun
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.25 no.2
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    • pp.80-86
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    • 2011
  • This paper presents an integrated variable amplitude high voltage pulse generation circuit with low power and small size for driving industrial piezoelectric printer heads. To solve the problems of large size and power overhead of conventional pulse generators that usually assembled with multiple high-cost discrete ICs on a PCB board, we have designed a new integrated circuit (IC) chip. Since all the functions are integrated on to a single-chip it can achieve low cost and control the high-voltage output pulse with variable amplitudes as well. It can also digitally control the rising and falling times of an output high voltage pulse by using programmable RC time control of the output buffer. The proposed circuit has been designed and simulatedd in a 180[nm] Bipolar-CMOS-DMOS (BCD) technology using HSPICE and Cadence Virtuoso Tools. The proposed single-chip pulse generation circuit is suitable for use in industrial printer heads requiring a variable high voltage driving capability.

Fast Rise Time High Voltage Pulse Generator Applying The Marx Generator (Marx 펄스발생기를 응용한 소형 고전압 급준 펄스 발생장치)

  • Park, Seung-Lok;Chung, Suk-Hwan;Kim, Jin-Gyu;Moon, Jae-Duk
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.50 no.2
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    • pp.72-78
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    • 2001
  • A compact size high voltage pulse generator with nanosecond rise time has been designed and investigated experimentally. The inductance of a pulse generator can be reduced by fixing the Marx generator and pulse forming network components into a single cylindrical unit. As a result, nanosecond rise time about $8{\sim}10[ns]$ and pulse width of several hundred [ns] can be obtained from a modified Marx pulse generator. And parametric studies showed that the rise time of the output pulse was depended little on the change of the load resistance and the charging capacitance while, the pulse width of the output pulse was depended greatly upon the change of the load resistance and the charging capacitance. The theoretical showed the possibility to design the laboratory-size pulse generator very fast rising time and a proper pulse width by minimizing stray inductance and varying resistance and capacitance.

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Research on the Variable-Width and Double-Pulse Generator (가변폭 Double-Pulse Generator에 관한 연구)

  • 이병선
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.7 no.4
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    • pp.6-13
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    • 1970
  • The variable-width and double-pulse generator Here described is completely transistorized so its size is small and it is convenient to handle. The frequency ran be varied from 1 KHz to 500KHz, the pulse width from 0.4$\mu$sec to 8$\mu$sec, amplitude from 1V to 10V, and interval of double pulse from 0$\mu$sec to 12$\mu$sec. Positive and negative signal or double pulse trains can he obtained. An analysis has been carried out for each stage and the design equations are derived. The experimental results are compared with the analysis.

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Design of PWM(Pulse Width Modulation) Circuit Using OTA with a single-voltage supply (OTA를 이용한 단전원 구동 펄스폭 변조(Pulse Width Modulation) 회로 설계)

  • 박선웅;김희준;송재훈;이은진
    • Proceedings of the IEEK Conference
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    • 2003.07c
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    • pp.2843-2846
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    • 2003
  • This paper proposes a PWM(Pulse Width Modulation) circuit using CMOS OTA with a single-voltage supply. The OTA employed has an input stage which consists of a pair of two MOSFETs operating in plural operation regions. The MOSFETs work complemetarily and realize a rail-to-rail input range. The input stage requires no matching of an n-channel type input circuit and a p-channel type input circuit unlike conventional rail-to-rail input stages because the input stage is realized by single channel type MOSFETs. In order to confirm the validity of the proposed circuit, it is simulated by H-SPICE program. Futhermore, the proposed circuit will be integrated on chip using 0.35 $\mu\textrm{m}$ CMOS technology.

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The Operational Characteristics of $LiNbO_3$ Q-Switch for Generating a Single Pulse Laser (단일 레이저 펄스 발생을 위한 $LiNbO_3$ Q-스윗치 동작 특성)

  • 문종민
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.13 no.3
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    • pp.7-10
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    • 1976
  • To eliminate some difficulties encountered in the operation of $LiNbO_3$ crystal as a Q-switch for generating a single pulse Nd-YAG laser, the operational characteristics of the crystal, was investigated. Also a simple method for solving the difficulties was presented.

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Electrochemical Behavior and Differential Pulse Polarographic Determination of Piperacillin Sodium

  • Hahn, Young-hee;Son, Ean-ji
    • Archives of Pharmacal Research
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    • v.23 no.3
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    • pp.197-201
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    • 2000
  • In an aqueous piperacillin sodium solution, a well-defined single wave or single peak was observed by direct current(DC) polarography or differential pulse polarography(DPP). The peak potential change per pH unit was -54 mV in the phosphate buffer at $18^{\circ}C$, which indicated that protons were involved in the electrochemical reduction of the 2,3-dioxopiperazine moiety of piperacillin sodium with a $H^{+}e^{-}$ ratio of one. Using a phosphate buffer of pH 4.3, the $1.0{times}10^{-7}$ M piperacillin sodium single peak could be determined by DPP with relative standard deviation of 1.6 %(n=3). Piperacillin sodium could be analyzed with-out interference from penicillin G-potassium, which enabled the employment of DPP as a fast and simple technique for monitoring the synthetic process of the antibiotic.

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Experimental study on the optimum pulse jet cleaning conditions of a rectangular bag-filter system (사각형 여과집진기 충격기류 시스템의 최적탈진조건에 관한 실험적 연구)

  • Piao, Cheng Xu;Kim, Tae Hyeung;Li, Xiao Yu;Ha, Hyun Chul;Jung, Jae Hun
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.18 no.3
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    • pp.189-203
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    • 2008
  • Cylindrical bag filter system with pulse jet cleaning has been the most common device to control particle laden exhaust gas from the various industrial processes. But, it has many shortcomings due to particle reattachment and frequent bag rupture. In recent years, rectangular type bag filter system has been developed to overcome the problems associated with the cylindrical system. However, not many studies about the rectangular system were not done, compared to the cylindrical system. In this study, the optimum pulse jet cleaning conditions were thus tested by the series of experiments. The factors tested in this study are pulse distance, pulse pressure, pulse duration, the number of holes for pulsing and bag materials. A single bag ($1,500mmL{\times}50mmW{\times}300mmH$) system and a multi-bags (3 bags in a row) were tested separately. The highest removal efficiency with a single bag system was found at the conditions with pulse distance of 10cm, pulse pressure of $3kg/cm^2$, pulse duration of 0.3s, pulse jet number of 6 and Polyester bag. With the multi-bags system, the best cleaning conditions were found at the bag interval of 20cm with the simultaneous pulsing and the bag interval of 15cm with the serial pulsing.

Research on Discontinuous Pulse Width Modulation Algorithm for Single-phase Voltage Source Rectifier

  • Yang, Xi-Jun;Qu, Hao;Tang, Hou-Jun;Yao, Chen;Zhang, Ning-Yun;Blaabjerg, Frede
    • Journal of international Conference on Electrical Machines and Systems
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    • v.3 no.4
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    • pp.433-445
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    • 2014
  • Single phase voltage source converter (VSC) is an important power electronic converter (PEC), including single-phase voltage source inverter (VSI), single-phase voltage source rectifier (VSR), single-phase active power filter (APF) and single-phase grid-connection inverter (GCI). As the fundamental part of large scale PECs, single-phase VSC has a wide range of applications. In the paper, as first, on the basis of the concept of the discontinuous pulse-width modulation (DPWM) for three-phase VSC, a new DPWM of single-phase VSR is presented by means of zero-sequence component injection. Then, the transformation from stationary frame (abc) to rotating frame (dq) is designed after reconstructing the other orthogonal current by means of one order all-pass filter. Finally, the presented DPWM based single-phase VSR is established analyzed and simulated by means of MATLAB/SIMULINK. In addition, the DPWMs presented by D. Grahame Holmes and Thomas Lipo are discussed and simulated in brief. Obviously, the presented DPWM can also be used for single-phase VSI, GCI and APF. The simulation results show the validation of the above modulation algorithm, and the DPWM based single-phase VSR has reduced power loss and increased efficiency.

A Pulse Frequency Control of Single-switch Three-phase ZCS Buck Rectifiers (단일 스위치 3상 ZCS 강압형 정류기의 펄스 주파수 제어)

  • 송중호;김용덕;이동윤;최익;최주엽;유지윤
    • The Transactions of the Korean Institute of Power Electronics
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    • v.4 no.1
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    • pp.82-90
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    • 1999
  • A pulse frequency control method for single-switch three-phase buck rectifiers is comprehensively studied in this paper. The proposed pulse frequency control method leads the three-phase buck rectifier to a high performance system that can draw the nearly sinusoidal input-line currents. The simulated and experimental results demonstrate that the system provides low total harmonic distortion of the input-line currents, high-power factor, and good output voltage regulation against load change.

Surfacing Process of Pulsed Nd:YAG laser by using Multiple mesh and Pulse Superposition Technique (다단메쉬 및 펄스중첩법을 적용한 펄스형 Nd:YAG의 Surfacing Process)

  • Joung, J.H.;Hong, J.H.;Kim, D.H.;Kim, H.J.;Cho, J.S.
    • Proceedings of the KIEE Conference
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    • 1997.11a
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    • pp.373-375
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    • 1997
  • In this study, we designed multiple mesh circuit consisting of 3-6 meshes and pulse superposition one consisting of a 3 mesh, and fabricated the electrical power supply and the single elliptical resonator. We developed the two pulse superposition technique forming the step pulse shapes of pulsed Nd:YAG laser with single shot multivibrator and 2 SCRs. Laser beam generated by multiple mesh circuit and superposition one respectively irradiated target surface to analyze process state of surface with spark and vapor. And it was obtained experimental results that all superposition meshes had common points which the best efficiency was obtained at delay time 0[${\mu}s$], followed by, no superposition and obtained at delay time 250[${\mu}s$].

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