Patent ID: 9314632
Filing Date: 2016-04-19
CPC Classification: A61N,H03L

Claim Text:
1. Circuitry configured to adjust a compliance voltage in an implantable stimulator device, comprising: a source circuit coupled to a compliance voltage, wherein the source circuit is configured to provide a first current pulse to at least a first electrode; a sink circuit coupled to a reference voltage, wherein the sink circuit is configured to sink the first current pulse from at least a second electrode; a first amplifier configured to measure a first analog voltage across the source circuit; a second amplifier configured to measure a second analog voltage across the sink circuit; a first reference voltage generator configured to produce an optimal first analog voltage; a second reference voltage generator configured to produce an optimal second analog voltage; a first comparator configured to compare the measured first analog voltage to the optimal first analog voltage and to produce a first digital signal indicating whether the measured first analog voltage is high or low relative to the optimal first analog voltage; a second comparator configured to compare the measured second analog voltage to the optimal second analog voltage and to produce a second digital signal indicating whether the measured second analog voltage is high or low relative to the optimal second analog voltage; logic circuitry configured to assess the first and second digital signals, and configured to issue a control signal; and regulator circuitry configured to adjust the compliance voltage in accordance with the control signal.