IMPLANTABLE PULSE GENERATOR

An implantable pulse generator (IPG, ) for neuro stimulation of a patient's body is described having a recharging unit (.d) with a rechargeable battery (.b) adapted to receive energy from a separate charger () utilizing inductive power transfer from a primary coil (.a) of the charger to a secondary coil () of the recharging unit, wherein the IPG () further comprises a processing unit (.e), wherein the recharging unit is adapted to communicate information from the IPG to the charger utilizing capacitive load shift keying (C-LSK) and resistive load shift keying (R-LSK). In order to improve communication reliability the processing unit is adapted to control dynamical selection of either C-LSK or R-LSK for communication of a pre-defined information and/or to control usage of both C-LSK and R-LSK for communication of a pre-defined information in a pre-defined sequence dependent on an actual measured value of at least one parameter of the electric circuitry of the recharging unit and/or dependent on the type of information which is to be communicated to the charger. Further, a system comprising the IPG and a charger is described as well as a neurostimulation device and a method for operating such IPG and such system.