• Title/Summary/Keyword: digital-circuit

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A Study of Algorithm for Digital Technology (디지털 기술의 알고리즘에 관한 연구)

  • Youn, Choong-Mo;Kim, Jae-Jin
    • Journal of Digital Contents Society
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    • v.10 no.4
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    • pp.633-637
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    • 2009
  • In this paper, we present the reuse module library generating algorithm and register-transfer (RT) library generating algorithm considering the power consumption of reuse module for field-programmable gate array (FPGA) technology mapping in order to implement into the circuit for calculating power consumption. To realize the circuit of calculation of power consumption, the FPGA is selected. Considering lookup table (LUT) conditions of selected FPGA, technology mapping process is conducted to minimize the total power consumption. With these information, the circuit is realized using suitable given power consumption among allocated results of modules.

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Study on Wireless Communication Module for a Realization of Maritime Telemedicine System (해상 원격의료진료 시스템 구현을 위한 통신모듈에 관한 연구)

  • Yun, Young
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2019.11a
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    • pp.209-210
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    • 2019
  • This paper deals in the wireless communication module for a realization of maritime telemedicine system. In order to provide a maritime telemedicine service, we realized a digital electronic circuit for a visual communication and remote control system. In this work, we report the digital circuit structure, and communication method, etc.

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Effectiveness of Blended Learning Method on Digital Logic Circuit

  • Lim, Se-Young;Lim, Dong-Kyun;Lee, Ji-Eun
    • International journal of advanced smart convergence
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    • v.4 no.2
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    • pp.34-37
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    • 2015
  • An ideal teaching-learning method, such as the blended learning method, is to motivate interests in education and to allow active class participation of students. Students exposed to this method are hypothesized to be dedicated in learning and their school life. A research was conducted on $11^{th}$ graders in Daejeon city high school specialized in industry; the blended learning method was applied to a course, digital logic circuit and the effects on the students' learning were monitored. The result shows that compared with a common leaning method, the blended learning method is very effective in terms of increasing educational interest, class participation, the level of concentration in class and academic achievement of students. Also, it shows positive feedbacks from the students on the educational videos and the usage of the contents. Conclusively, the blended learning method effectively increases academic achievements through improved educational motivation and active class participation which positively affect the overall satisfaction of participants.

ave PWM Inverter (안정파PWM인버어터를 위한 새로운 디지털방식)

  • 정연택;한경희;이종수
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.37 no.2
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    • pp.80-88
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    • 1988
  • As a method to improve harmonics in the voltage source PWM inverter, 5 level stair case wave method is used. The complementary transistor inverter (CTI) bridge circuit has this characteristics. This circuit required synchronous type 3 level PWM signal. In this paper, the 3 phase PWM digital signals within about 10 modulation error of the natural sampling was caculated, and a ROM table out of it for the digital signal of the control system was made. According to this table, the digital control method was proposed, and DTI circuit operated by this method was reviewed. It was confirmed to make V/F control possible by the select modulation ratio to the frequency.

Design and Fabrication of Digital Tuning Analog Component IC (Digital Tuning Analog Component 집적회로의 설계 및 제작)

  • Shin, Myung Chul;Jang, Young Wook;Kim, Young Saeng;Ko, Jin Soo
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.23 no.6
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    • pp.923-928
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    • 1986
  • This paper describes the design and fabrication of a high performance digital tuning analog component integrated circuit that contains a television station detector and decoders(H and L types). When the comparator level sampling method is used, this integrated circuit can be used as a stable channel selector for an external circuit with very large signal variation. It has been fabricated using the SST bipolar standard process and its chip size is 2.2x2.1mm\ulcorner As a result, we have succeeded in fabricating the IC that satisfies the D.C characteristics, and the channel station detector and decoder function.

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Design and Fabrication of Digital Volum Control IC (Digital volume control 집적회로의 설계 및 제작)

  • Jang, Young Wook;Kim, Young Saeng;Shin, Myung Chul
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.23 no.6
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    • pp.747-753
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    • 1986
  • This paper describes the design and fabrication of a digital volume control integrated circuit which replaces a mechanical volume control. The integrated circuit can be controlled volume by up/down switch. It has been fabricated by SST bipolar standard process. Its chip size is 2.5x2.5 mm\ulcorner As a result, we succeeded in fabrication of integrated circuit which satisfied DC characteristics and proper operation of volume control.

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A Study on the Design of a Beta Ray Sensor Reducing Digital Switching Noise (디지털 스위칭 노이즈를 감소시킨 베타선 센서 설계)

  • Kim, Young-Hee;Jin, Hong-Zhou;Cha, Jin-Sol;Hwang, Chang-Yoon;Lee, Dong-Hyeon;Salman, R.M.;Park, Kyung-Hwan;Kim, Jong-Bum;Ha, Pan-Bong
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.13 no.5
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    • pp.403-411
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    • 2020
  • Since the analog circuit of the beta ray sensor circuit for the true random number generator and the power and ground line used in the comparator circuit are shared with each other, the power generated by the digital switching of the comparator circuit and the voltage drop at the ground line was the cause of the decreasein the output signal voltage drop at the analog circuit including CSA (Charge Sensitive Amplifier). Therefore, in this paper, the output signal voltage of the analog circuit including the CSAcircuit is reduced by separating the power and ground line used in the comparator circuit, which is the source of digital switching noise, from the power and ground line of the analog circuit. In addition, in the voltage-to-voltage converter circuit that converts VREF (=1.195V) voltage to VREF_VCOM and VREF_VTHR voltage, there was a problem that the VREF_VCOM and VREF_VTHR voltages decrease because the driving current flowing through each current mirror varies due to channel length modulation effect at a high voltage VDD of 5.5V when the drain voltage of the PMOS current mirror is different when driving the IREF through the PMOS current mirror. Therefore, in this paper, since the PMOS diode is added to the PMOS current mirror of the voltage-to-voltage converter circuit, the voltages of VREF_VCOM and VREF_VTHR do not go down at a high voltage of 5.5V.

Experimental Study of Interface Circuit Implementation in Hybrid System (Hybrid System을 위한 Interface 회로구성의 실험적 연구)

  • Myoung Sam Ko
    • 전기의세계
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    • v.26 no.6
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    • pp.41-47
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    • 1977
  • The paper deals with the fundamental specification for the physical implementation of interface circuit, which will play an important role in information and signal trammission between computer and controlled system, and also we have proved that the digital contoller will be able to improve the data handling of interface circuit.

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Developement of Radiation Measuring System using Wireless Communication (무선통신을 이용한 방사선측정 시스템 개발)

  • Lee, Bong-Jae;Chang, Si-Young
    • Journal of Radiation Protection and Research
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    • v.20 no.2
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    • pp.85-95
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    • 1995
  • Radiation measuring system using wireless communication method with single channel has been diveloped and tested. In this system, radiation signals from GM tube are transformed into digital pulses in pulse processing circuit and modulated in FSK (frequency shift keying) circuit for digital communication and then wirelessly transmitted to a receiving unit. The digital pulses received are then demodulated in FSK circuit and converted into radiation dose/dose rate in the data acquisition unit to display on the screen of a personal computer. The performance of this system was evaluated by using both a pulse generator and a standard radiation source(Cs-137). In both cases, digital pulses with 5V were observed in pulse processing circuit without distortion of their shape through wireless communication system. The experimental results of radiation measurement by this system after several test-irradiation of GM detector to a standard radiation source(Cs-137), showed good agreement with irradiation dose rate within 10% difference, and proved that this system could be effectively utillized as radiation measuring instrument. It is expected that this wireless radiation measuring system developed for the first time in Korea, can be used as a radiation monitor as well as a personal dosimeter if we can further improve this system to adopt wireless multichannel communication system.

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Study for improvement of zero-cross detector of control element drive mechanism control system in PWR (경수로 제어봉구동장치제어계통의 영점위상탐지기 성능개선에 관한 연구)

  • 김병문;이병주;한상준
    • 제어로봇시스템학회:학술대회논문집
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    • 1996.10b
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    • pp.609-611
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    • 1996
  • Zero-Cross Detector makes pilot signal to control the power to CEDM(Control Element Drive Mechanism). Existing Zero-Cross Detectors has had a problem which can cause unexpected reactor trip resulted from fluctuating frequency of input signal coming from M/G Set. The existing Zero-Cross Detector can't work properly when power frequency is varying because it was designed to work under stable M/G Set operation, and produces wrong pilot signal and output voltage. In this report the Zero-Cross Detector is improved to resolve voltage fluctuating problem by using new devices such as digital noise filtering circuit, variable cycle compensator and alarm circuit. And through the performance verification it shows that new circuit is better than old one. If suggested detector is applied to plant, it is possible to use it under House Load Operation because stable voltage can be generated by new Zero-Cross Detector.

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