Using Stimulation Circuitry to Provide DC Offset Compensation at Inputs to Sense Amp Circuitry in a Stimulator Device

Techniques and circuitry are disclosed that provide DC offset compensation to equate the DC values of the inputs to sense amp circuitry used to sense neural responses in a stimulator device. When a DC offset is present at the inputs to the sense amp circuitry, the stimulation circuitry is used to remove this DC offset by providing one or more charge imbalanced pulses that are either net cathodic or net anodic. Control of the stimulation circuitry can occur using a DC offset compensation algorithm programmed into control circuitry of the stimulator device. Use of the stimulation circuitry itself to provide DC offset compensation is beneficial because it is already present in the stimulator device, and is able to provide larger amplitude currents to remove the DC offset more quickly.