22,955 research outputs found
Two-phase RTD-CMOS pipelined circuits
MOnostable-BIstable Logic Element (MOBILE) networks can be operated in a gate-level pipelined fashion (nanopipeline) allowing high through output. Resonant tunneling diode (RTD)-based MOBILE nanopipelined circuits have been reported using different clock schemes including a four-phase strategy and a single-phase clock scheme. In particular, significant power advantages of single-phase RTD-CMOS MOBILE circuits over pure CMOS have been shown. This letter compares the RTD-CMOS realizations using a single clock and a novel two-phase clock solution. Significant superior robustness and performance in terms of power and area are obtained for the two-phase implementations
Efficient state reduction methods for PLA-based sequential circuits
Experiences with heuristics for the state reduction of finite-state machines are presented and two new heuristic algorithms described in detail. Results on machines from the literature and from the MCNC benchmark set are shown. The area of the PLA implementation of the combinational component and the design time are used as figures of merit. The comparison of such parameters, when the state reduction step is included in the design process and when it is not, suggests that fast state-reduction heuristics should be implemented within FSM automatic synthesis systems
The generalized H\"older and Morrey-Campanato Dirichlet problems for elliptic systems in the upper-half space
We prove well-posedness results for the Dirichlet problem in
for homogeneous, second order, constant complex
coefficient elliptic systems with boundary data in generalized H\"older spaces
and in generalized
Morrey-Campanato spaces
under certain assumptions on the growth function . We also identify a
class of growth functions for which
and for which the aforementioned well-posedness results are equivalent, in the
sense that they have the same unique solution, satisfying natural regularity
properties and estimates.Comment: Minor correction
Efficient realization of a threshold voter for self-purging redundancy
The self-purging technique is not commonly used mainly due to the lack of practical implementations of its key component, the threshold voter. A very efficient implementation of this voter is presented which uses a decomposition technique to substantially reduce the circuit complexity and delay, as compared to alternative implementations.ComisiĂłn Interministerial de Ciencia y TecnologĂa TIC97-064
RTD based logic circuits using generalized threshold gates
Many logic circuit applications of Resonant Tunneling
Diodes are based on the MOnostable-BIstable Logic Element
(MOBILE). Threshold logic is a computational model
widely used in the design of MOBILE circuits, i.e. these circuits
are built from threshold gates (TGs). The MOBILE realization
of generalized threshold gates is being investigated.
Multi-Threshold Threshold Gates (MTTGs) have been proposed
which further increase the functionality of the original TGs.
Recently, we have proposed a novel MOBILE circuit topology
obtained by fundamental properties of threshold functions. This
paper describes the design of n-bit adders using these novel
MOBILE circuit topologies. A comparison with designs based
on TGs and MTTGs is carried out showing advantages in
terms of speed and power delay product and device counts.España, Gobierno TEC2007-67245Junta de AndalucĂa EXC/2007/TIC-296
An extra time duration model with application to unemployment duration under benefits in Spain
This paper postulates that the effect of unemployment benefits on the hazard rates changes considerably using a traditional duration model that uses only unemployment insurance (UI) data, or deals with unemployment assistance (UA) as a mere extension of UI, instead of an extra time duration model that accounts separately for transition rates to work of the unemployed who receive UI and UA. For UI recipients the hazard rate rises dramatically when UI benefits lapse approaches. On the contrary, for UA recipients the hazard rate remains flat or even has a slight fall nearby the UA lapse. Finally, there is a group of unemployed qualified for UA that quit UI due to the income fall that they will experience when they pass from UI to UA.unemployment benefits mixed proportional hazard model, unobserved heterogeneity
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