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Binary Counters Using Adiabatic Quantum Flux Parametron Logic
IEEE Transactions on Applied Superconductivity ( IF 1.8 ) Pub Date : 2021-03-01 , DOI: 10.1109/tasc.2020.3044677
Taiki Yamae , Naoki Takeuchi , Nobuyuki Yoshikawa

Adiabatic quantum-flux-parametron (AQFP) logic is an energy-efficient superconductor logic family. In this article, we design binary counters, namely an up counter, a down counter, and an up/down counter, based on AQFP logic. These binary counters are T-flip-flop-based and count logic 1s in the input signal that is synchronized with excitation currents, which clock the counters. The internal state of a T flip-flop changes when the internal state of the previous T flip-flop changes from logic 1 to 0 and from logic 0 to 1 for the count-up and count-down operations, respectively. Each internal state of a T flip-flop is read out serially by a buffer chain coupled to the T flip-flops. We fabricate 4-bit up, down, and up/down counters using the AIST 10 kA/cm2 Nb high-speed standard process and demonstrate their correct operation at low frequency. This is the first demonstration of binary counters based on AQFP logic.

中文翻译:

使用绝热量子通量参数逻辑的二进制计数器

绝热量子通量参数 (AQFP) 逻辑是一种高能效超导体逻辑系列。在本文中,我们基于 AQFP 逻辑设计二进制计数器,即向上计数器、向下计数器和向上/向下计数器。这些二进制计数器是基于 T 触发器的,并且在与激励电流同步的输入信号中计数逻辑 1,激励电流为计数器计时。当前一个 T 触发器的内部状态从逻辑 1 变为 0 和从逻辑 0 变为 1 分别进行递增和递减操作时,T 触发器的内部状态就会发生变化。T触发器的每个内部状态由耦合到T触发器的缓冲器链串行读出。我们使用 AIST 10 kA/cm2 Nb 高速标准工艺制造了 4 位向上、向下和向上/向下计数器,并演示了它们在低频下的正确操作。
更新日期:2021-03-01
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