Patents by Inventor Daran DeShazo

Daran DeShazo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11160984
    Abstract: In one embodiment, an implantable pulse generator (IPG) for providing a neurostimulation therapy, comprises: pulse generation circuitry and pulse delivery circuitry for controlling generation and delivery of electrical pulses to a patient using one or more electrodes of a stimulation lead; measurement circuitry for determining characteristics of one or more electrodes selected for delivery of electrical pulses; and a processor for controlling the IPG according to executable code; wherein the IPG is adapted to calculate values for an impedance model of the one or more selected electrodes using the determined plurality of voltage measurements and to adjust current levels for the exponentially decreasing current pattern based on the calculated values for the impedance mode.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: November 2, 2021
    Assignee: Advanced Neuromodulation Systems, Inc.
    Inventors: Daran DeShazo, Steven Boor, Vidhi Desai
  • Publication number: 20210330982
    Abstract: The present disclosure provides systems and methods for generating waveforms for an implantable pulse generator of a neurostimulation system. A waveform generation system includes a computing device, at least one buffer memory, and at least one programmable current regulator. The at least one buffer memory is coupled between the computing device and the at least one programmable current regulator. The computing device is configured to load a string of output current values into the at least one buffer memory, and the at least one buffer memory is configured to sequentially feed each output current value to the at least one programmable current regulator. Further, the at least one programmable current regulator is configured to control current supplied to a plurality of electrodes based on the received output current values.
    Type: Application
    Filed: April 22, 2020
    Publication date: October 28, 2021
    Inventors: Gavin Rade, Daran DeShazo
  • Publication number: 20210330978
    Abstract: The present disclosure provides systems and methods for circuitry for an implantable pulse generator (IPG) of a neurostimulation system. The circuitry includes at least one anode node, at least one cathode node, a plurality of switching circuits, each switching circuit coupled to the at least one anode node and the at least one cathode node, and a plurality of output channels, each output channel coupled between an associated switching circuit and at least one electrode. The circuitry further includes a first DC blocking capacitor coupled between the at least one anode node and the plurality of switching circuits, a second DC blocking capacitor coupled between the at least one cathode node and the plurality of switching circuits. The circuitry further includes mitigation circuitry operable to limit DC leakage from the plurality of switching circuits through the plurality of output channels.
    Type: Application
    Filed: April 22, 2020
    Publication date: October 28, 2021
    Inventors: Steven Boor, Daran DeShazo
  • Patent number: 11154714
    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.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: October 26, 2021
    Assignee: Advanced Neuromodulation Systems, Inc.
    Inventors: Daran DeShazo, Steven Boor, Gavin L. Rade
  • Patent number: 11135439
    Abstract: Embodiments are directed to an implantable medical device comprising therapeutic stimulation circuitry for controlling delivery of a medical therapy to a patient, the therapeutic stimulation circuitry having at least one lead having electrodes for delivering the medical therapy. The implantable medical device further comprises measurement circuitry for determining characteristics of the at least one lead, a processor for controlling the IMD according to executable code, and memory for storing data and executable code, wherein the executable code comprises instructions for causing the processor to receive a plurality of voltage measurements associated with the electrodes, and calculate values for an impedance model of the electrode/tissue interface.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: October 5, 2021
    Assignee: ADVANCED NEUROMODULATION SYSTEMS, INC.
    Inventors: Daran DeShazo, Steven Boor, Vidhi Desai
  • Patent number: 11135431
    Abstract: An implantable medical device (IMD) includes multiple stimulation engines for independently stimulating respective electrode sets of a lead system while avoiding collisions and/or channel contention during stimulation delivery. A first voltage multiplier is configured to generate an adjustable target voltage having sufficient headroom at an output node that is commonly coupled to anodic nodes of respective stimulation engines. Each stimulation engine includes a secondary voltage multiplier to drive the respective anode and a current regulator powered by a floating voltage supply, wherein the current regulator is coupled to a cathodic node and configured to control how much stimulation current is pulled from the patient tissue.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: October 5, 2021
    Assignee: Advanced Neuromodulation Systems, Inc.
    Inventors: Daran DeShazo, Steven Boor
  • Patent number: 11121624
    Abstract: A configurable multi-output charge pump for power supply generation includes one or more flying capacitors (FCs) arranged to be switchably connected into a plurality of circuit configurations operative to provide respective output voltages at a common charging node. A configuration logic circuit is operative to generate one or more configuration setting control signals to effectuate a particular circuit configuration. One or more storage capacitors (SC) are independently and individually connectable to the common charging node depending on a selection control logic having a configurable duty cycle, wherein each SC is operative to supply a respective voltage output to drive a corresponding electrical load.
    Type: Grant
    Filed: August 13, 2020
    Date of Patent: September 14, 2021
    Assignee: Advanced Neuromodulation Systems, Inc.
    Inventor: Daran DeShazo
  • Publication number: 20210275819
    Abstract: A system and method for measuring and monitoring charge states of one or more electrodes of an implanted stimulation lead system associated with an IPG. A Kelvin connection scheme operative with a switching circuit is provided for coupling select electrode terminals disposed in a Kelvin connection measurement loop in a switchable manner to sense and reference inputs of an analog-to-digital converter (ADC) configured as at least part of diagnostic circuitry for the IPG.
    Type: Application
    Filed: June 30, 2020
    Publication date: September 9, 2021
    Inventors: Steven Boor, Daran Deshazo
  • Publication number: 20210275805
    Abstract: A system and method for measuring, monitoring and mitigating EMI interference in an implanted stimulation lead system associated with an IPG. A Kelvin connection scheme operative with a diagnostic circuit is provided for sensing an interference voltage induced at a Kelvin connect electrode of the lead system, wherein the diagnostic circuit is configured to generate one or more control signals for adjusting in substantially real time a common-mode voltage reference provided to supply a biasing voltage to the IPG circuitry.
    Type: Application
    Filed: July 16, 2020
    Publication date: September 9, 2021
    Inventors: Steven Boor, Daran DeShazo
  • Publication number: 20210252291
    Abstract: An implantable medical device (IMD) includes multiple stimulation engines (SEs) for independently stimulating respective electrode sets of a lead system. A voltage multiplier (VM) is configured to generate an adjustable target voltage at an output node. Each stimulation engine includes first switching circuitry to switchably connect an anodic node of the SE to the VM output node and second switching circuitry to switchably connect a cathodic node of the SE to a current sink circuit. Discharge switching circuitry may be disposed between the anodic and cathodic nodes of each SE. A selector and associated digital control logic block are operative to generate control signals for independently controlling respective SEs such that each SE may be activated to stimulate or discharge a corresponding select set of electrodes independently from or in concert with remaining SEs.
    Type: Application
    Filed: February 13, 2020
    Publication date: August 19, 2021
    Applicant: Advanced Neuromodulation Systems, Inc.
    Inventors: Daran DeShazo, Steven Boor, Gavin L Rade
  • Publication number: 20210244948
    Abstract: A system and method for extracting ETI load parametric data relative to one or more electrodes of an implanted stimulation lead system associated with an IPG. A Kelvin connection scheme is provided for measuring induced voltages present at stimulated electrodes during a stimulation ramping sequence, which may be used for determining the ETI parametric data using a number of techniques, including, without limitation, a waveform analysis.
    Type: Application
    Filed: February 6, 2020
    Publication date: August 12, 2021
    Applicant: Advanced Neuromodulation Systems, Inc.
    Inventors: Daran DeShazo, Steven Boor
  • Publication number: 20210236822
    Abstract: An implantable medical device (IMD) includes multiple stimulation engines for independently stimulating respective electrode sets of a lead system while avoiding collisions and/or channel contention during stimulation delivery. A first voltage multiplier is configured to generate an adjustable target voltage having sufficient headroom at an output node that is commonly coupled to anodic nodes of respective stimulation engines. Each stimulation engine includes a secondary voltage multiplier to drive the respective anode and a current regulator powered by a floating voltage supply, wherein the current regulator is coupled to a cathodic node and configured to control how much stimulation current is pulled from the patient tissue.
    Type: Application
    Filed: January 31, 2020
    Publication date: August 5, 2021
    Applicant: Advanced Neuromodulation Systems, Inc.
    Inventors: Daran DeShazo, Steven Boor
  • Patent number: 11071864
    Abstract: An apparatus and method for providing split stimulation currents in a pulse generator. In one embodiment, a current regulator of the pulse generator includes a digitally-programmable analog voltage generator coupled to a first input of an error amplifier that receives a second input controlled by a programmable resistor network configured to control a programmable total stimulation current output. A plurality of current splitting switches are operative to split the programmable total stimulation current output into a corresponding plurality of split current segments, which may be individually mapped to a selected set of lead electrodes across one or more implantable leads associated with the pulse generator.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: July 27, 2021
    Assignee: Advanced Neuromodulation Systems, Inc.
    Inventors: Steven Boor, Daran DeShazo
  • Publication number: 20210178162
    Abstract: A neurostimulation (NS) system and method are provided. The NS system includes an array of electrodes positioned within a patient. The array of electrodes includes an active electrode. The active electrode is configured to be a cathode electrode located proximate to neural tissue of interest that is associated with a target region. The NS system includes an anode electrode and an electromagnetic interference (EMI) antenna. A control circuit is configured to control delivery of a NS therapy during a therapy delivery interval. The NS therapy is to be delivered between the anode electrode and the active electrode. The NS system develops a residual voltage between the anode electrode and the active electrode over the therapy delivery interval. A current regulator (CR) circuit is connected to the cathode electrode. The CR circuit is configured to control current flow through the cathode electrodes.
    Type: Application
    Filed: February 26, 2021
    Publication date: June 17, 2021
    Inventors: Steven Boor, Daran DeShazo
  • Patent number: 10946199
    Abstract: A neurostimulation system (NS) includes an array of electrodes positioned within a patient with an active cathode electrode located proximate to target neural tissue. A control circuit is controls delivery of therapy during a therapy delivery interval, with the therapy being delivered between an anode electrode and the active electrode. A current regulator circuit (CRC) is connected to the cathode electrode and controls current flow through the cathode electrodes. The control circuit manages the CRC to control a discharge current flow over the discharge operation to discharge developed residual voltage between the anode electrode and the active electrode in a manner that follows an actively emulated passive discharge (AEPD) profile. During the discharge operation, the CRC is connected to the inactive electrode, and receives, as a first input, an EMI feedback signal.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: March 16, 2021
    Assignee: ADVANCED NEUROMODULATION SYSTEMS, INC.
    Inventors: Steven Boor, Daran DeShazo
  • Publication number: 20210023373
    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.
    Type: Application
    Filed: July 23, 2019
    Publication date: January 28, 2021
    Inventors: Daran DeShazo, Steven Boor, Gavin L. Rade
  • Publication number: 20200346014
    Abstract: A neurostimulation system (NS) includes an array of electrodes positioned within a patient with an active cathode electrode located proximate to target neural tissue. A control circuit is controls delivery of therapy during a therapy delivery interval, with the therapy being delivered between an anode electrode and the active electrode. A current regulator circuit (CRC) is connected to the cathode electrode and controls current flow through the cathode electrodes. The control circuit manages the CRC to control a discharge current flow over the discharge operation to discharge developed residual voltage between the anode electrode and the active electrode in a manner that follows an actively emulated passive discharge (AEPD) profile. During the discharge operation, the CRC is connected to the inactive electrode, and receives, as a first input, an EMI feedback signal.
    Type: Application
    Filed: May 2, 2019
    Publication date: November 5, 2020
    Inventors: Steven Boor, Daran DeShazo
  • Publication number: 20200346005
    Abstract: A neurostimulation (NS) system and method are provided. The system includes a power supply having positive and negative terminals. The negative terminal defines a reference ground. An array of electrodes are positioned within a patient. The array of electrodes includes first and second active electrodes for delivering stimulation therapy configured to be located proximate to neural tissue of interest that is associated with a target region. A control circuit is configured to control delivery of stimulation current for a NS therapy between the first and second electrodes. A current regulator (CR) circuit is connected to, and configured to control current flow through, at least the first electrode during delivery of the stimulation therapy under direction of the control circuit. A floating power supply is connected across power supply terminals of the CR circuit. The CR circuit and floating power supply are coupled to a floating ground node that is electrically separate from the reference ground.
    Type: Application
    Filed: May 2, 2019
    Publication date: November 5, 2020
    Inventors: Steven Boor, Daran DeShazo, Gavin L. Rade
  • Publication number: 20200338352
    Abstract: The present disclosure provides systems and methods for an output architecture for an implantable pulse generator of a neurostimulation system. The output architecture includes a power supply, a plurality of outputs, a global source current regulator coupled to the power supply and operable to source current from the power supply to the plurality of outputs through a plurality of source current branches, a global sink current regulator operable to sink current from the plurality of outputs to ground through a plurality of sink current branches, a current source branch selector operable to select, for each of the plurality of outputs, an amount of current sourced from the plurality of source current branches, and a current sink branch selector operable to select, for each of the plurality of outputs, an amount of current sunk to the plurality of sink current branches.
    Type: Application
    Filed: April 29, 2019
    Publication date: October 29, 2020
    Inventors: Daran DeShazo, Steven Boor, Gavin L. Rade
  • Publication number: 20200306533
    Abstract: In one embodiment, an implantable pulse generator (IPG) for providing a neurostimulation therapy, comprises: pulse generation circuitry and pulse delivery circuitry for controlling generation and delivery of electrical pulses to a patient using one or more electrodes of a stimulation lead; measurement circuitry for determining characteristics of one or more electrodes selected for delivery of electrical pulses; and a processor for controlling the IPG according to executable code; wherein the IPG is adapted to calculate values for an impedance model of the one or more selected electrodes using the determined plurality of voltage measurements and to adjust current levels for the exponentially decreasing current pattern based on the calculated values for the impedance mode.
    Type: Application
    Filed: March 29, 2019
    Publication date: October 1, 2020
    Inventors: Daran DeShazo, Steven Boor, Vidhi Desai