Centre National Detudes Spatiales

Michel Pignol

Yann Deval

Jean-Baptiste Begueret

Claude Neveu

Olivier Mazouffre

A device for extracting a clock signal from a baseband serial signal, includes an injection-locked oscillator (), a phase-locked loop () including a digital phase detector (). The oscillator () includes a digital input for controlling the value of its natural frequency, and the phase-locked loop () includes a counting circuit () aggregating the relative values of the digital signal supplied by the digital phase detector () and supplying a control signal in digital form for the oscillator ().

Clock extraction device with digital phase lock, requiring no external control

The present invention concerns a software system that tolerates transient errors made up by a processing unit, including:

Software system tolerating transient errors and control process in such a system

This invention relates to a processing procedure for an electronic system subject to transient error constraints, in which two virtual sequences installed on a single physical sequence are multiplexed in time in one given real time cycle (the data resulting from each execution of a virtual sequence being stored so that they can be voted before use), and in which if an error is detected, the real time cycle in progress is inhibited and a healthy context is reloaded to make a restart that consists of a nominal execution of the next cycle starting from the reloaded context. This invention also relates to a memory access monitoring device.

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Toulouse, France

Michel Pignol