Section: New Results
Detection of the instability of amplifiers
Participants : Laurent Baratchart, Sylvain Chevillard, Martine Olivi, Jean-Baptiste Pomet, Fabien Seyfert.
A new collaboration with the CNES and the University of Bilbao began this year. The goal is to help the development of amplifiers, in particular to detect unstability at an early stage of the design.
Currently, Electrical Engineers from the University of Bilbao, under contract with CNES (the French Space Agency), use heuristics to diagnose instability before the circuit is physically implemented. We intend to set up a rigorously founded algorithm instead, based on properties of transfer function of such amplifiers which belong to particular classes of analytic functions.
We completed the first stage of this collaboration, in that
we now have a formal definition of stability within these classes: a stable
function is one which, when connected in parallel with a large
resistor, yields a