Margin and Energy Dissipation of Adiabatic Quantum-Flux-Parametron Logic at Finite Temperature

Ortlepp

IEEE Trans. Appl. Supercond.

et al. 2014

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We experimentally demonstrated high-speed logic operations of adiabatic quantum-flux-parametron (AQFP) gates through the use of quantum-flux-latches (QFLs). In QFL-based high-speed test circuits (QHTCs), the output data of the circuits under test (CUTs), which are driven by high-speed excitation currents, are stored in QFLs and are slowly read out using low-speed excitation currents. We designed and fabricated three types of QHTCs using QFLs with different circuit parameters, where the CUTs were buffer gates and AND gates. We confirmed the correct operation of buffer gates and AND gates at 1 GHz. The obtained bias margins of the 1 GHz excitation currents were more than ±30% for each QHTC, which is wide enough for high-speed logic operations of AQFP gates.Index Terms-Adiabatic logic, adiabatic quantum-fluxparametron (AQFP), high-speed operation, Josephson circuits, latch, superconducting integrated circuits.

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Section: Introductionmentioning

confidence: 99%

High-Speed Experimental Demonstration of Adiabatic Quantum-Flux-Parametron Gates Using Quantum-Flux-Latches

Ortlepp

IEEE Trans. Appl. Supercond.

et al. 2014

Self Cite

show abstract

“…Energy-efficient superconducting circuits based on rapid single flux quantum (RSFQ) circuits [1] have been proposed recently, which include eSFQ [2], ERSFQ [3], RQL [4], and LV-RSFQ [5]. We have been developing adiabatic quantum flux parametron (AQFP) circuits based on QFP circuits [6], which are extremely energy efficient superconducting circuits [7][8][9][10]. The AQFP circuit is a promising superconducting circuit for realizing ultra-low-power computing systems because the operating frequency can be 5 to 10 GHz and the bit-energy is about six orders of magnitudes lower than that of CMOS.…”

Section: Introductionmentioning

confidence: 99%

A random-access-memory cell based on quantum flux parametron with three control lines

Takayama

et al. 2018

J. Phys.: Conf. Ser.

“…Among superconductor logics, adiabatic quantum-flux-parametron (AQFP) logic 6,7 is an ultra-low-power logic that has extremely high energy-efficiency. We have measured the bit energy of an AQFP gate with critically damped Josephson junctions 8 and demonstrated logic circuits using AQFP logic.…”

Section: Introductionmentioning

confidence: 99%

Novel latch for adiabatic quantum-flux-parametron logic

Ortlepp

Journal of Applied Physics

et al. 2014