Capacitive voltage multiplier for providing adjustable control during a stimulation pulse
AssigneeAdvanced Neuromodulation Systems, Inc.
InventorsDaran DeShazo, Steven Boor, Gavin L. Rade
Life of this patent
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Abstract
An implantable medical device (IMD) includes an adjustable capacitive voltage multiplier (CVM) that is responsive to diagnostic circuitry configured to provide control signals within a single stimulation current pulse for adjusting the voltage output applied to an electrode of the IMD's lead system. A control counter is coupled to the diagnostic circuitry for incrementing or decrementing an N-bit counter output signal operative to reconfigure a charge pump arrangement of the CVM so as to facilitate an adjusted voltage output.
Claims1
A method for providing adjustable voltage multiplier control in an implantable medical device (IMD), the method comprising:
- initializing a charge pump arrangement of a capacitive voltage multiplier (CVM) disposed in the IMD to generate a target voltage at a CVM output node;
- connecting the CVM output node to a first electrode of an implantable lead system of the IMD, the implantable lead system having one or more leads, wherein each lead includes a plurality of electrodes and the implantable lead system is positioned proximate to a patient's tissue;
- commencing delivery of a stimulation current pulse to the tissue;
- and
- responsive to determining that a control signal is received from one or more diagnostic circuits associated with the implantable lead system of the IMD while the stimulation current pulse is being delivered, performing following operations:
- (a) disconnecting the CVM output node from the first electrode of the implantable lead system;
- (b) maintaining an auxiliary voltage source connection with the first electrode while the CVM output node is disconnected;
- (c) reconfiguring the charge pump arrangement based on the control signal to adjust the target voltage to be output;
- and
- (d) reconnecting the CVM output node to provide an adjusted target voltage to the first electrode of the implantable lead system.
Dependencies are inferred from the claim text.