Patent ID: 9463328
Filing Date: 2016-10-11
CPC Classification: A61N,H02M

Claim Text:
1. An implantable medical device comprising: first and second operating circuits each requiring different reference voltages; first reference voltage circuit for producing a first reference voltage; a capacitive circuit comprising a plurality of capacitors and a plurality of switches arranged such that: control circuitry configured to generate a second reference voltage different from the first reference voltage by: during a first time period, placing the capacitive circuit in the first switch configuration to cause the first capacitor to be charged to the first reference voltage and the second capacitor to be discharged; during a second time period following the first time period, placing the capacitive circuit in the second switch configuration to cause charge redistribution between the first and second capacitors; and during a third time period, placing the capacitive circuit in the third switch configuration to generate the second reference voltage for use by the second operating circuit; wherein the operational circuitry is configured to control the capacitive circuit to provide the second reference voltage as an output having a predefined ripple relative to a nominal voltage by selecting the first, second and third time periods to manipulate the ripple using the following criteria: while the device is in a first state, relatively low power state, allowing a first amount of ripple; and while the device is in a second, relatively higher power state, allowing less ripple than in the first state.