采用自适应保持器控制的超低电压异步动态管道鲁棒节能

Yu Chen, Mingoo Seok, S. Nowick
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引用次数: 4

摘要

异步动态管道越来越多地被使用,包括在最近的商业设计流程中,因为它们同时提供高性能,无时钟操作和延迟不敏感的通信。虽然它们也显示出节能的超低电压电路的前景,但这些电路表现出严重的稳健性问题。本文介绍了一种自适应守护器解决方案,以消除写争用问题。在没有参考时钟的情况下,必须安全地处理任意未知的数据速率和拥塞,因此传统的同步设计解决方案无法应用。该方法在两个广泛使用的管道(PS0和PCHB)中得到了验证,通过在每个管道阶段动态监控相邻流量,直接解决了异步争用问题。流水线纹波进位加法器的仿真显示,与非自适应设计相比,在0.3 V下可以正确工作,能量提高高达4.4倍。此外,该方法还在0.6 V和标称1.0 V电压下分别提高了24.4%和17.4%的管道吞吐量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Robust and energy-efficient asynchronous dynamic pipelines for ultra-low-voltage operation using adaptive keeper control
Asynchronous dynamic pipelines are increasingly being used, including in recent commercial design flows, since they simultaneously provide high-performance, clock-free operation and delay-insensitive communication. While they also show promise for energy-efficient ultra-low-voltage circuits, with always-on keepers, these circuits exhibit severe robustness issues. In this paper, an adaptive keeper solution is introduced, to eliminate write contention issues. Arbitrary unknown data rates and congestion must be safely handled, without a reference clock, hence conventional solutions for synchronous design cannot be applied. The proposed method, demonstrated in two widely-used pipelines (PS0, PCHB), directly addresses the asynchronous contention issue by dynamic monitoring of neighboring traffic at each pipeline stage. Simulations of a pipelined ripple-carry adder show correct operation at 0.3 V with energy improvements of up to 4.4× compared to a non-adaptive design. In addition, the approach also improves pipeline throughput by 24.4% and 17.4% at 0.6 V and nominal 1.0 V, respectively.
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