• Title/Summary/Keyword: Digital Logic Circuit

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Curriculum for Basic Digital Logic Circuit Practices through Arduino Device Programming (아두이노 장치 프로그래밍을 통한 기초 디지털 논리 회로 실습 교육 과정)

  • Hur, Kyeong
    • Journal of Practical Engineering Education
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    • v.9 no.1
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    • pp.41-48
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    • 2017
  • In this paper, we proposed a method for digital logic circuit control, through arduino device programming with digital outputs, to design a curriculum for basic digital logic circuit practices. Curricula for arduino device programming and digital logic circuit are essentially practiced in engineering departments of colleges or high schools in South Korea. However, actual practice course lacks the experimental examples of digital logic circuit combined with arduino device programming. Furthermore, actual practice course lacks the curriculum in that students design and test their own digital logic circuits with the less cost than the oscilloscope. Therefore, to solve these problems in this paper, we proposed a curriculum for basic digital logic circuit practices during one semester. In this curriculum, students control and experiment their own digital logic circuits through arduino device programming with digital outputs.

Development and Analyses of an PBL-based Digital Logic Education Program using Electrical Circuit Experiments (전기회로실험을 이용한 PBL기반 디지털 논리회로 교육방법 개발 및 적용 분석)

  • Hur, Kyeong
    • Journal of The Korean Association of Information Education
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    • v.13 no.3
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    • pp.341-349
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    • 2009
  • In this paper, we proposed an Electric Circuit manipulation method to identify easily results of Digital Logic Circuits. Using this method for computer science educations, we can feasibly instruct and understand principles of a Digital Logic Circuit which is a basis of real Digital systems. Furthermore, we developed an PBL-based education program for Digital Logic Circuit concept and Boolean Algebra concept by applying the proposed Electric Circuit manipulation method and by explaining real life Digital Instrument examples. The experimental results are analyzed in views of the problem-solving ability and suitability of allocating degrees of difficulties to the developed Digital Logic Circuit problems.

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Implementation of a Switch-based LED Art Logic Circuit for Basic Digital Logic Circuit Practice (기초디지털논리회로 실습을 위한 스위치 기반 LED Art 논리 회로 구현)

  • Hur, Kyeong
    • Journal of Practical Engineering Education
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    • v.8 no.2
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    • pp.95-101
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    • 2016
  • In this paper, we introduce an implementation method of switch-based LED (Light Emitting Diode) Art logic circuits to help understanding the operation principle of digital logic circuits. Digital logic circuit practice using bread board is widely practiced in colleges or high schools in South Korea. However, actual digital logic circuit practice lacks examples of basic implementation, and as results of this problem, study with more complicated examples disturbs understanding the basic operation principle of digital logic circuits. Therefore, we proposed and tested an implementation method of switch-based LED Art logic circuits to help understanding the necessity of digital logic circuits which control signals of multiple output devices simultaneously.

Design & Implementation of an Educational Digital Logic Circuit Simulator (교육용 디지털 논리회로 시뮬레이터 설계 및 구현)

  • Kim, Eun-Ju;Lyu, Sung-Pil
    • The Journal of Korean Association of Computer Education
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    • v.11 no.2
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    • pp.65-78
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    • 2008
  • Many digital logic circuit simulators have been developed for the education on the experiments of digital logic circuits for college or high school students. But the existing simulators have some constraints on the number of inputs of gate, on the display of gate and wire states, and on the number of logic diagrams to be simulated. 1n this paper, we propose a simulator XSIM(eXpandable digital logic circuit SIMulator) which mitigates the constraints and allows multiple diagrams for large scale logics. It is expected that the multiple diagrams on large logics are helpful for team-teaching in school.

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Development of RSFQ Logic Circuits and Delay Time Considerations in Circuit Design (RSFQ 논리회로의 개발과 회로설계에 대한 지연시간 고려)

  • Kang, J.H.;Kim, J.Y.
    • Progress in Superconductivity
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    • v.9 no.2
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    • pp.157-161
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    • 2008
  • Due to high speed operations and ultra low power consumptions RSFQ logic circuit is a very good candidate for future electronic device. The focus of the RSFQ circuit development has been on the advancement of analog-to-digital converters and microprocessors. Recent works on RSFQ ALU development showed the successful operation of an 1-bit block of ALU at 40 GHz. Recently, the study of an RSFQ analog-to-digital converter has been extended to the development of a single chip RF digital receiver. Compared to the voltage logic circuits, RSFQ circuits operate based on the pulse logic. This naturally leads the circuit structure of RSFQ circuit to be pipelined. Delay time on each pipelined stage determines the ultimate operating speed of the circuit. In simulations, a two junction Josephson transmission line's delay time was about 10 ps, a splitter's 14.5 ps, a switch's 13 ps, a half adder's 67 ps. Optimization of the 4-bit ALU circuit has been made with delay time consideration to operate comfortably at 10 GHz or above.

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A Study on Constructing the Digital Logic Switching Function using Partition Techniques (분할기법을 이용한 디지털논리스위칭함수구성에 관한 연구)

  • Park Chun-Myoung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2006.05a
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    • pp.721-724
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    • 2006
  • This paper presents a method of the constructing the digital logic switching functions and realizing the circuit design using partition techniques. First of all, we introduce the necessity, background and concepts of the partition design techniques for the digital logic systems. Next, we discuss the definitions that are used in this paper. For the purpose of the circuit design for the digital logic switching functions, we discuss the extraction of the partition functions. Also we describe the construction method of the building block, that is called the building block, based on each partition functions. And we apply the proposed method to the example, and we compare the results with the results of the earlier methods. In result, we describe the control functions, it means that we obtain the effective cost in the digital logic design for any other earlier methods.

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Simulation of HTS RSFQ A/D Converter and its Layout (고온 초전도 RSFQ A/D 변환기의 시물레이션과 설계)

  • 남두우;정구락;강준희
    • Progress in Superconductivity and Cryogenics
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    • v.4 no.1
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    • pp.8-12
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    • 2002
  • Since the high performance analog-to-digital converter can be built with Rapid Single Flux Quantum (RSFQ) logic circuits the development of superconductive analog-to-digital converter has attracted a lot of interests as one of the most prospective area of the application of Josephson Junction technology. One of the main advantages in using Rapid Sng1e Flux Quantum logic in the analog-to-digital converter is the low voltage output from the Josephson junction switching, and hence the high resolution. To design an analog-digital converter, first we have used XIC tool to compose a circuit schematic, and then studied the operational principle of the circuit with WRSPICE tool. Through this process, we obtained the proper circuit diagram of an 1-bit analog-digital converter circuit. The optimized circuit was laid out as a mask drawing. Inductance values of the circuit layout were calculated with L-meter.

FPGA implementation of A/D converter using stochastic logic (FPGA를 이용한 확률논리회로 A/D 컨버터의 구현)

  • 이정원;심덕선
    • Proceedings of the IEEK Conference
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    • 1998.06a
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    • pp.847-850
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    • 1998
  • One of the most difficult problem of designing VLSI is a mixed-circuit design, that is to design circuit containing both analog parts and digital parts. Digital to analog converter and analog to digital converter is a typical case. Especially it can be a serious problem when mixed circuit are put into a large digital circuit like microcontroller. However nowadays this problem is settled by separating analog circuit parts outside the IC. This technique is based on converting a digital signal into a pulse sequence. Then an analog signal is obtained by averaging this pulse sequence at the external low-pass filter. An anlog to digital converter is designed using a stochastic logic instead of a traditional PWM (pulse-width modulation) signal and ins implemente dusing FPGa. Stochastic pulse sequence can be made as a simple circuits and moreover can be mathematically processed by simple circuits -AND gates. The spectral property of stochastic pulse sequence method is better than that of PWM method. So it make easy to design a external low-pass filter. This technique has important advantages, especially the reduction of the ADC cost.

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Virtual Lecture Contents for Digital Logic Circuit Using Multimedia (멀티미디어를 이용한 디지털 논리 회로 콘텐츠)

  • Lim, Dong-Kyun;Oh, Won-Geun
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.12 no.1
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    • pp.59-64
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    • 2008
  • In this paper, we developed an virtual lecture to study digital logic circuits. The contents is intended fer the students without or with little knowledge about electrics or electronics. For the beginners, the lecture contains the basic electronics and basic circuit theory as well as the degital logic circuits to be more practical lecture. And we developed the virtual circuit lab which uses real-like devices, circuits and interactive objects for the students to experience practical digital circuits. With the features described above, this contents would be useful for the beginners who want to studying digital logic circuits.