A pulse current generation circuit (100) for neural stimulation, comprising: an analogue signal receiving apparatus (101) for receiving an analogue signal; an analogue-to-digital converter (102) for converting the analogue signal into a digital control signal; a current signal controller (103) for producing, according to the digital control signal, pulse current parameters for generating a bi-directional pulsed current signal; and a current generator (104) for generating, according to the pulse current parameters, a bi-directional pulsed current signal for neural stimulation, wherein the current generator can generate pulse currents of different precisions according to the pulse current parameters. According to the pulse current generation circuit, a more effective stimulation effect can be generated, and a higher processing requirement, such as stimulation algorithm optimization, can be adapted at a hardware level. In addition, the present invention further relates to a charge compensation circuit, a charge compensation method, and an implantable electrical retina stimulator using the pulse current generation circuit or charge compensation circuit.
PULSE CURRENT GENERATION CIRCUIT FOR NEURAL STIMULATION, CHARGE COMPENSATION CIRCUIT AND METHOD, AND IMPLANTABLE ELECTRICAL RETINA STIMULATOR