Scrambling the current signature of an integrated circuit

摘要

The circuit has a linear regulator (4``) between a ground terminal (22) of an internal load (29) and a terminal (32) connected to the ground of an external supply voltage source (Vps). The regulator is in parallel with capacitive clipping circuits (5`) having switched capacitances. The circuits (5`) are activated, in an operation phase (D) of the integrated circuit, at the same time as the regulator. The operation phase (D) corresponds to a phase in which a calculating processor which contains the internal load (29) is active. An independent claim is also included for a method for scrambling the current signature of a load including an integrated circuit.