Abstract: The invention concerns a method for verifying, prior to fabrication, the proper operation of integrated circuit electronic systems using analog signals. It comprises the following steps: identifying (22) the noise-sensitive circuits, setting an acceptable sensitivity template for these noise-sensitive circuits, identifying (34) the noise-generating circuits, modeling the noise, determining (50) the function for transferring noise to the sensitive circuits, and comparing (58) the level of noise reaching the sensitive circuits to an acceptable sensitivity threshold template for the sensitive circuits.

Abstract: The present invention is a method for modeling the switching activity of a digital circuit, this digital circuit comprising cells linked together by interconnections, these cells switching at an instant at which at least one of their inputs changes state, successive switchings of the cells of the circuits occurring during a clock period Tclk of this circuit, the clock period includes the following steps: calculating based on an adapted statistical model the number of cells liable to switch over each time interval [tk, tk+1] of the clock period, and allocating switching instants to the different cells of the digital circuit based on the knowledge of the number of cells liable to switch over the time intervals [tk; tk+1]. The present invention is further a production method.

Abstract: The invention concerns a method for testing immunity to noise derived from interferences between components in a mixed analogic and digital electronic system. The method comprises determining by simulating the highest-level noise observed in the system, or the worst noise generated by interferences. If a test for noise sensitivity is successful with this injected worst noise, then the system is accepted. In the case where the worst noise test fails, the method comprises calculating by simulating the lowest-level noise observed in the system, or the injected best noise. If a test for noise sensitivity fails with this injected best signal, then the system is rejected.