We formalize the AutoFocus Semantics (a time-synchronous subset of the Focus formalism) as stream processing functions on finite and infinite message streams represented as finite/infinite lists. The formalization comprises both the conventional single-clocking semantics (uniform global clock for all components and communications channels) and its extension to multi-clocking semantics (internal...

In the molecular quantum-dot cellular automata (QCA) paradigm clocking wires are used to produce an electric field which is perpendicular to the device plane of surface-bound molecules and is sinusoidally modulated in space and time. This clocking field guides the data flow through the molecular QCA array. Power is dissipated in clocking wires due to the non-zero resistance of the conductors. W...

Intense X-ray free-electron lasers (XFELs) can rapidly excite matter, leaving it in inherently unstable states that decay on femtosecond timescales. As the relaxation occurs primarily via Auger emission, excited state observations are constrained by decay. In situ measurement of this process is therefore crucial, yet has thus far remained elusive at XFELs due to inherent timing and phase jitter...

quantum-dot cellular automata (qca) is an emerging and promising technology that provides significant improvements over cmos. recently qca has been advocated as an applicant for implementing reversible circuits. however qca, like other nanotechnologies, suffers from a high fault rate. the main purpose of this paper is to develop a fault tolerant model of qca circuits by redundancy in hardware a...

The register element (flip-flop) is a basic building block to design any clocking system, which consists of the clock distribution tree and flip-flops. A large portion of the on chip power is consumed by the clocking system the total power consumption of the clocking system depends on both clocking distribution tree and also the register elements (flip-flops). The power consumption of register ...

Distributing high quality clock signals is one of the most challenging tasks in high-performance microprocessors. Clocking circuitry accounts for an overwhelming amount of total power consumption in multi-GHz processors. Unfortunately, deteriorating clock skew and jitter make it very difficult to reduce power dissipation. We propose a new global clocking scheme, injection-locked clocking (ILC),...