• 제목/요약/키워드: D flip-flop

검색결과 65건 처리시간 0.032초

뉴런 모스 기반의 4치 논리게이트를 이용한 동기식 4치 카운터 설계 (Design of Synchronous Quaternary Counter using Quaternary Logic Gate Based on Neuron-MOS)

  • 최영희;윤병희;김흥수
    • 대한전자공학회논문지SD
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    • 제42권3호
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    • pp.43-50
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    • 2005
  • 본 논문에서는 다운 디지털 회로(DLC)를 이용하여 4치 논리 게이트를 설계하였고, 이들 게이트를 이용하여 동기식 4치 up/down 카운터를 제안하였다. 제안된 카운터는 T-type 4치 플립플롭과 $2\times1$ 임계-t 멀티플렉서로 이루어져 있고, T-type 4치 플립플롭은 D-type 4치 플립플롭과 4치 논리 게이트들(모듈러-4 가산 게이트, 4치 인버터, 항등 셀, $4\times1$ 멀티플렉서)로 구성되어 있다. 이 카운터의 모의실험 결과는 10[ns]의 지연시간과 8.48[mW]의 전력소모를 보여준다. 또한 다치논리 회로로 설계된 카운터는 상호결선과 칩 면적의 감소뿐만 아니라 디지트 확장의 용이함의 이점을 가진다.

3치 논리 게이트를 이용한 3치 순차 논리 회로 설계 (The Design of the Ternary Sequential Logic Circuit Using Ternary Logic Gates)

  • 윤병희;최영희;이철우;김흥수
    • 대한전자공학회논문지SD
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    • 제40권10호
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    • pp.52-62
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    • 2003
  • 본 논문에서는 3치 논리 게이트, 3치 D 플립플롭과 3치 4-디지트 병렬 입력/출력 레지스터를 제안하였다. 3치 논리 게이트는 n 채널 패스 트랜지스터와 뉴런 MOS(νMOS) 임계 인버터로 구성된다. 3치 논리 게이트들은 다양한 임계 전압을 갖는 다운 리터럴 회로를 사용하였고 전송함수를 바탕으로 설계되었다. 뉴런 MOS 트랜지스터는 다치 논리 구현에 가장 적합한 게이트이고 다양한 레벨의 입력 신호를 갖는다. 3치 D 플립 플롭과 3치 레지스터는 3치 데이터를 임시로 저장할 수 있는 저장 장치로 사용할 수 있다. 본 논문에서는 3.3V의 전원 전압을 사용하였고 0.35um 공정 파라미터를 이용하여 모의 실험을 통해 그 결과를 HSPICE로 검증하였다.

A 23.52µW / 0.7V Multi-stage Flip-flop Architecture Steered by a LECTOR-based Gated Clock

  • Bhattacharjee, Pritam;Majumder, Alak;Nath, Bipasha
    • IEIE Transactions on Smart Processing and Computing
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    • 제6권3호
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    • pp.220-227
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    • 2017
  • Technology development is leading to the invention of more sophisticated electronics appliances that require long battery life. Therefore, saving power is a major concern in current-day scenarios. A notable source of power dissipation in sequential structures of integrated circuits is due to the continuous switching of high-frequency clock signals, which do not carry any information, and hence, their switching is eliminated by a method called clock gating. In this paper, we have incorporated a recent clock-gating style named Leakage Control Transistor (LECTOR)-based clock gating to drive a multi-stage sequential architectures, and we focus on its performance under three different process corners (fast-fast, slow-slow, typical-typical) through Monte Carlo simulation at 18 GHz clock with 90 nm technology. This gating is found to be one of the best gated approaches for multi-stage architectures in terms of total power consumption.

단자속 양자 DFFC와 Inverter의 설계와 측정 (Design and Measurement of SFQ DFFC and Inverter)

  • 정구락;홍희송;박종혁;임해용;강준희;한택상
    • Progress in Superconductivity
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    • 제5권1호
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    • pp.17-20
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    • 2003
  • We have designed and measured a SFQ(Single Flux Quantum) DFFC and an Inverter(NOT) for superconducting ALU(Arithmetic Logic Unit) development. To optimize the circuit, we used Julia, XIC, and L meter for circuit simulations and circuit layouts. The Inverter was consisted of a D Flip-Flop, a data input, a clock input and a data output. If a data pulse arrives at the inverter, then the output reads ‘0’ (no output pulse is produced) at the next clock period. If there is no input data pulse, it reads out ‘1’(output pulse is produced). The DFFC was consisted of a D flip-Flop, an Inverter, a Data in, a Clock in and two outputs. If a data pulse arrives at the DFFC circuit, then the output2 reads ‘1’ at the next clock period, otherwise it reads out ‘1’ to output1. Operation of the fabricated chip was performed at the liquid helium temperature and at the frequencies of 1KHz.

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ALU를 위한 단자속 양자 D2 Cell과 Inverter의 설계 (Design of Single Flux Quantum D2 Cell and Inverter for ALU)

  • 정구락;박종혁;임해용;강준희;한택상
    • 한국초전도저온공학회:학술대회논문집
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    • 한국초전도저온공학회 2003년도 학술대회 논문집
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    • pp.140-142
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    • 2003
  • We have designed a SFQ (Single Flux Quantum) D2 Cell and Inverter(NOT) for a superconducting ALU (Arithmetic Logic Unit). To optimize the circuit, we have used Julia, XIC and Lmeter for simulations and layouts. We obtained the circuit margin of larger than $\pm$25%. After layout, we drew chip for fabrication of SFQ D2 Cell and Inverter. We connected D2 Cell and Inverter to jtl, DC/SFQ, SFQ/DC and RS flip-flop for measurement.

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High-speed CMOS Frequency Divider with Inductive Peaking Technique

  • Park, Jung-Woong;Ahn, Se-Hyuk;Jeong, Hye-Im;Kim, Nam-Soo
    • Transactions on Electrical and Electronic Materials
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    • 제15권6호
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    • pp.309-314
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    • 2014
  • This work proposes an integrated high frequency divider with an inductive peaking technique implemented in a current mode logic (CML) frequency divider. The proposed divider is composed with a master-slave flip-flop, and the master-slave flip-flop acts as a latch and read circuits which have the differential pair and cross-coupled n-MOSFETs. The cascode bias is applied in an inductive peaking circuit as a current source and the cascode bias is used for its high current driving capability and stable frequency response. The proposed divider is designed with $0.18-{\mu}m$ CMOS process, and the simulation used to evaluate the divider is performed with phase-locked loop (PLL) circuit as a feedback circuit. A divide-by-two operation is properly performed at a high frequency of 20 GHz. In the output frequency spectrum of the PLL, a peak frequency of 2 GHz is obtained witha divide-by-eight circuit at an input frequency of 250 MHz. The reference spur is obtained at -64 dBc and the power consumption is 13 mW.

Reset time을 줄인 Phase Frequency Detector (A PFD (Phase Frequency Detector) with Shortened Reset time scheme)

  • 윤상화;최영식;최혁환;권태하
    • 한국정보통신학회:학술대회논문집
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    • 한국해양정보통신학회 2003년도 추계종합학술대회
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    • pp.385-388
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    • 2003
  • 본 논문에서 제안하는 PFD(Phase Frequency Detector)는 Reset을 줄여 응답 속도의 특성을 향상시키기 위해 기존 회로인 Flip-Flop의 D-Latch circuit를 Memory Cell로 대신한 회로이다. 회로의 특성을 검증하기 위해 HSPICE Tool를 이용 simulation 하였으며 Hynix 0.35um CMOS 공정을 사용하였다.

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