Arrangement for delayed electrical charge compensation when administering stimulation current pulses and measuring electrical responses evoked by the pulses

摘要

An arrangement adapted for electrical charge balancing after the generation of one or more stimulation current pulses, including a bridge circuit, Switching elements, a bridge branch between two legs of the bridge circuit, in which a load resistance can be introduced, as well as at least one current source for generating at least one stimulation current pulse, which is connected to the legs of the bridge circuit such that it allows an electrical current through a leg through the bridge branch and further through a leg connected to the other end of the bridge branch with a corresponding switch position, characterized in that it includes in the bridge branch a capacitive element for generating a current for electrical charge compensation for current introduced by one or more stimulation current pulses and is arranged such that a delay period is maintained between one or more stimulation current pulses and a discharge of the capacitive element via one or more stimulation electrodes; used to measure electrical physiological signals produced in response to the stimulation current pulse (s); and related subjects of the invention (FIG. 4).