Systems and methods for evoked signal sensing using adjustable dc offset compensation

An electrical stimulation system, comprising:

• at least one electrical stimulation lead comprising a plurality of electrodes;
• and
• a stimulator coupled or coupleable to the at least one electrical stimulation lead, the stimulator comprising
• stimulation generation circuitry configured to provide stimulation to tissue of a patient via one or more of the electrodes;
• an evoked signal sensing arrangement configured to receive, from at least one of the electrodes, an evoked signal from the tissue in response to the stimulation, wherein the evoked signal sensing arrangement comprises
• a sense amplifier circuit configured to
• receive, at a node, a sense amplification input signal that is based, at least in part, on the evoked signal received from the at least one of the electrodes, and
• provide a sense amplification output signal by amplifying the sense amplification input signal, and
• a DC offset compensation circuit configured to provide DC offset compensation at the node, and
• a processor configured to
• during the providing of the stimulation, directing the DC offset compensation circuit to provide, at the node, the DC offset compensation at a first magnitude;
• and
• after the providing of the stimulation and during a sensing window for the evoked signal, either a) directing the DC offset compensation circuit to provide, at the node, the DC offset compensation at a second magnitude that is no more than one-third of the first magnitude or b) directing the DC offset compensation circuit to provide, at the node, no DC offset compensation.