213 research outputs found
Impact of aging on the soft error rate of 6T SRAM for planar and bulk technologies
This paper evaluates the impact of aging on the radiation sensitivity of 6T SRAMfor two planar bulk technologies. This study ismotivated by the growing impact of aging and radiation effects on the reliability of CMOS technology. Amodelling methodology dedicated to this newphenomenon is proposed. Thismodelling uses the radiation modelling device MUSCA SEP3 and an electrical aging modelling. First, the impact of aging on SEE sensitivity is studied through a parametric modeling of the threshold voltages of the transistors composing the 6T SRAM. Then, an operative avionics environment is modelled in order to evaluate the consequences on reliability
A High Voltage Programmable Input Interface for Avionic Equipment
International audienceAvionic computers are required to sense their environment or interact with other devices through the use of various sensors or communication buses. Currently, these sensors and buses use dedicated interfaces, which limits the functionalities that can be implemented in the computer. In this paper, we propose a programmable interface meant to interface most common sensors found in avionics, which could facilitate the designand reuse of avionic computers. The architecture of the interface is presented, with a focus on the programmable analog signal conditioning stage which is able to withstand the high voltages present in the harsh avionic environment
Special values of triple-product -adic L-functions and non-crystalline diagonal classes
The main purpose of this note is to understand the arithmetic encoded in the special value of the -adic -function (f, associated to a triple of modular forms of weights , in the case where the classical -function (which typically has sign +1 does not vanish at its central critical point . When corresponds to an elliptic curve and the classical -function vanishes, the Elliptic Stark Conjecture of Darmon-Lauder-Rotger predicts that (f, is either 0 (when the order of vanishing of the complex -function is ) or related to logarithms of global points on and a certain Gross-Stark unit associated to (when the order of vanishing is exactly 2). We complete the picture proposed by the Elliptic Stark Conjecture by providing a formula for the value in the case where
Instantaneous band gap collapse in photoexcited monoclinic VO due to photocarrier doping
Using femtosecond time-resolved photoelectron spectroscopy we demonstrate
that photoexcitation transforms monoclinic VO quasi-instantaneously into a
metal. Thereby, we exclude an 80 femtosecond structural bottleneck for the
photoinduced electronic phase transition of VO. First-principles many-body
perturbation theory calculations reveal a high sensitivity of the VO
bandgap to variations of the dynamically screened Coulomb interaction,
supporting a fully electronically driven isostructral insulator-to-metal
transition. We thus conclude that the ultrafast band structure renormalization
is caused by photoexcitation of carriers from localized V 3d valence states,
strongly changing the screening \emph{before} significant hot-carrier
relaxation or ionic motion has occurred
Embedded real-time monitoring using SystemC in IMA network
Avionics is one kind of domain where prevention prevails. Nonetheless fails
occur. Sometimes due to pilot misreacting, flooded in information. Sometimes
information itself would be better verified than trusted. To avoid some kind of
failure, it has been thought to add,in midst of the ARINC664 aircraft data
network, a new kind of monitoring
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