Stimulator circuit, a system for providing a stimulation of a brain and/or a nerve, and a method for providing a compensated stimulation signal

A stimulator circuit for generating a stimulation signal, said stimulator circuit comprising:

• a stimulation signal generating unit configured to generate a stimulation signal and provide the stimulation signal to an output of the stimulator circuit, wherein the stimulation signal comprises a sequence of temporally separated bursts, wherein each burst comprises an alternating current, AC, signal having a sinusoidal-like waveform;
• a compensation unit configured to, during a burst of the stimulation signal, generate a compensation current signal for charge balancing and provide the compensation current signal to the output of the stimulator circuit for compensating an unbalanced charge of the stimulation signal and forming a compensated stimulation signal at the output of the stimulator circuit, wherein the compensation unit is configured to determine the compensation current signal based on a common mode voltage of the stimulation signal and a reference voltage;
• and
• a control unit configured to control the reference voltage in dependence of a remaining offset voltage at the output of the stimulator circuit between bursts of the stimulation signal.