A stimulation circuit for a channel in a multi-channel stimulator having a common voltage power supply for each of the channels included therein includes means for generating a stimulation current that is output by the channel and means for selecting between a high voltage compliance mode and a low voltage compliance mode for the channel. In the low voltage compliance mode, the channel operates at a voltage level substantially equal to a voltage level of the common voltage power supply. In the high voltage compliance mode, the channel operates at a voltage level that is higher than the voltage level of the common voltage power supply.
