Delay Insensitive Logic for RSFQ Superconductor Technology
نویسندگان
چکیده
Asychronous designs have been touted as having potential advantages in average performance, power consumption, modularity, and tolerance of metastability as compared to traditional synchronous logic. While delayinsensitive (DI) asynchronous circuits are theoretically the most desirable type of asynchronous logic because they make the weakest timing assumptions, the complexity of implementing DI circuits in CMOS or similar technologies may make them impractical to use. The fact that event-based DI circuits are ill matched to CMOS does not necessarily mean that they are inherently inefficient, however. In this paper, we show that using Rapid Single Flux Quantum (RSFQ) superconducting circuits, in which information is represented as discrete voltage pulses or magnetic flux quanta, many powerful DI circuit primitives can be implemented at least as efficiently as Boolean logic gates. Since DI logic also alleviates the severe clock skew problems that can be expected at the switching speeds approaching a terahertz in this technology, it may well be a more practical basis for digital circuit design than alternatives traditionally used for CMOS.
منابع مشابه
Design and Simulation of RSFQ/RISC Computer System
We present a novel asynchronous RSFQ digital circuit, Test-Timed RSFQ digital circuit and system(TT), in this paper. With this asynchronous approach, data is transferred in a delay-insensitive fashion to avoid the overhead of global clock distribution and the timing uncertainty. According to the scheme, the timing signal of the logic module is generated by a test logic module. The delay module ...
متن کاملSuperconducting Technology Assessment Position Papers
The challenges to extending the delivered computing capabilities of semiconductor technology through Moore's Law, while manageable in the short term, may prove difficult or possibly impractical in the long term. Even now, the complex interplay of power and performance is resulting in significant changes in previous trends. Clock rates of commodity microprocessors are flattening even as multi-co...
متن کاملArchitecture and Design of an 8-bit Flux-1 Superconductor Rsfq Microprocessor
The first single-chip superconductor FLUX-1 microprocessor has been designed in the Rapid Single Flux Quantum (RSFQ) logic and fabricated using 4 kA/cm, 1.75μm Nb/AlOx/Nb Josephson junction technology as a result of the collaboration between SUNY Stony Brook and TRW, Inc. A FLUX-1 chip represents an 8-bit deeply pipelined microprocessor prototype with a target clock frequency of 17-20 GHz. A ne...
متن کاملTowards Structural Testing of Superconductor Electronics
Many of the semiconductor technologies are already facing limitations while new-generation data and telecommunication systems are implemented. Although in its infancy, superconductor electronics (SCE) is capable of handling some of these high-end tasks. We have started a defect-oriented test methodology for SCE, so that reliable systems can be implemented in this technology. In this paper, the ...
متن کاملExperimental Verification of Superconductor Digital Circuits
Superconducting digital technology based on Rapid Single Flux Quantum (RSFQ) logic offers a 50 times faster clock rate and 100 times less on chip power consumption than today’s mainstream semiconductor electronics. This technology is attractive for many applications and in particular for Digital Signal Processing (DSP). The applications of the RSFQ DSPs are numerous and include multi-user detec...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1997