A stimulator circuit comprises: a stimulation signal generating unit configured to generate a stimulation signal and provide the stimulation signal to an output wherein the stimulation signal is an alternating current, AC, signal having a sinusoidal-like waveform; and a compensation unit configured to generate a compensation current signal, wherein the compensation unit comprises a common mode voltage monitoring element configured to monitor a common mode voltage based on the stimulation signal, and a charge balancing element configured to generate the compensation current signal based on the common mode voltage; wherein the compensation unit is configured to provide the compensation current signal to the output for compensating an unbalanced charge of the stimulation signal and forming a compensated stimulation signal at the output.