Neurostimulation method and system for active emulation of passive discharge in presence of mri/emi interference

A neurostimulation (NS) system, comprising:

• an array of electrodes positioned within a patient, the array of electrodes including an active electrode, the active electrode configured to be a cathode electrode located proximate to neural tissue of interest that is associated with a target region;
• an anode electrode;
• an electromagnetic interference (EMI) antenna;
• a control circuit configured to control delivery of a NS therapy during a therapy delivery interval, the NS therapy to be delivered between the anode electrode and the active electrode, the NS system developing a residual voltage between the anode electrode and the active electrode over the therapy delivery Interval;
• a current regulator (CR) circuit connected to the cathode electrode, the CR circuit configured to control current flow through the cathode electrodes;
• during a discharge operation, the control circuit configured to manage the CR circuit to control a discharge current flow over the discharge operation to discharge the residual voltage after therapy delivery in a manner that follows an actively emulated passive discharge (AEPD) profile;
• and
• during the discharge operation, the CR circuit connected to the EMI antenna, the CR circuit receiving, as a first input, an EMI feedback signal from the EMI antenna, the CR circuit configured to regulate the discharge current flow through the active electrode based on the EMI feedback signal, to maintain the AEPD profile over the discharge operation while in a presence of an EMI event.