Patent ID: 8694095

Claim:
An apparatus comprising: an implantable medical device, comprising: a first electrostimulation voltage generator, configured to generate a first electrostimulation voltage; a first capacitor having a first capacitance value, coupled to the first electrostimulation voltage generator, and configured to be capable of storing the first electrostimulation voltage; a second capacitor having a second capacitance value; and a third capacitor having a third capacitance value, wherein the third capacitance value exceeds the second capacitance value; and a processor, comprising an evoked-response sensing mode, the processor configured to place one of the second capacitor and the third capacitor in series with the first capacitor during delivery of the first electrostimulation voltage to an electrostimulation target, such that the second capacitor is used during the delivery when in an evoked-response sensing mode and the third capacitor is used during the delivery when not in an evoked-response sensing mode, wherein the evoked-response sensing mode comprises at least one of an autocapture mode or an autothreshold mode wherein the first electrostimulation voltage generator and the first capacitor are arranged in a first pacing channel, wherein the third capacitor comprises a capacitor from a different pacing channel when the evoked-response sensing mode is enabled, and wherein the processor is configured to switch from the second capacitance value to the third capacitance value by substituting the third capacitor for use as the second capacitor when the evoked-response sensing mode is enabled.