Implantable medical device comprising an active circuit RF telemetry

The device is in particular a stimulation device, resynchronization, defibrillation and / or cardioversion. It comprises a main circuit, an auxiliary circuit (10) of RF telemetry and a stack (14) for supplying the main and auxiliary circuits. Is provided between the supply battery and the auxiliary circuit a control circuit (16) including an accumulator member of electrical energy (12), coupled to the auxiliary circuit (10) for outputting a current suitable for supplying the auxiliary circuit, and a circuit (18, 20, 22, 24) of charge of the accumulator unit, coupled to the supply stack (14) to bring and maintain said accumulator member (12) at a predetermined charge level.