Abstract: A current switcher including: a positive supply bus and a negative supply bus; a floating-output current amplifier configured to make flow, as an output, an intermediate current dependent on a flowing setpoint current implied as an input; at least one anodic reference dipole connected between the positive supply bus and the floating-output current amplifier; at least one cathodic reference dipole connected between the floating-output current amplifier and the negative supply bus; and at least two stimulation bridges, each stimulation bridge including an anodic current source and a cathodic current source each configured to copy the intermediate current.