The invention relates to a control device (1) for a neural stimulation device (2) comprising an electrode voltage connector (3) configured to be connected to the neural stimulation device (2) for obtaining an electrode voltage (VEL)of the neural stimulation device (2)； a current control signal connector (4, 4') configured to be connected to the neural stimulation device (2) for providing a current control signal (b[5:0], b[5], b[4:0]) to the neural stimulation device (2), where an electrode current of the neural stimulation device (2) is controlled by the current control signal (b[5:0], b[5], b[4:0])； a analog-to-digital converter unit (5) configured to digitize an input voltage, which is the electrode voltage (VEL) obtained via the electrode voltage connector (3) or a converted voltage corresponding to the electrode voltage (VEL) obtained via the electrode voltage connector (3) subtracted from a preset reference voltage (Vref), and to provide a digital output signal as a result of the digitization； and a digital control unit (6) configured to generate the current control signal (b[5:0], b[5], b[4:0]) in dependence upon the digital output signal provided by the analog-to-digital converter unit (5) and provide the current control signal (b[5:0], b[5], b[4:0]) to the current control signal connector (4, 4'), in order to provide a power-efficient control for a versatile and reliable use of a neural simulation device (2).
