Patents by Inventor Stephen John Fedigan
Stephen John Fedigan 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).
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Patent number: 12128459Abstract: A signal generator has a generator output. The signal generator is configured to generate first and second signals at the generator output. The first signal has a first frequency, and the second signal has a second frequency. Switching circuitry has a circuitry input and a circuitry output. The circuitry input is coupled to the generator output. The circuitry output is adapted to be coupled to an ultrasonic transducer mechanically coupled with a surface. The switching circuitry is configured to: provide the first signal to the ultrasonic transducer at the first frequency to reduce a fluid droplet on the surface from a first size to a second size; and provide the second signal to the ultrasonic transducer at the second frequency to reduce the fluid droplet from the second size to a third size.Type: GrantFiled: March 23, 2020Date of Patent: October 29, 2024Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Stephen John Fedigan, David Patrick Magee
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Publication number: 20240339845Abstract: A power management unit having battery switchover topology including a first battery in operative communication with a first battery first power switch in parallel with a first battery second power switch, and in operative communication with a first battery power dump unit; a second battery in operative communication with a second battery first power switch in parallel with a second battery second power switch, and in operative communication with a second battery power dump unit; an nth battery in operative communication with an nth battery first power switch in parallel with an nth battery second power switch; the first battery, the second battery and the nth battery are connected to a bus that supplies an electrical load; and the electrical load being supplied sequentially by a first battery current from the first battery, a second battery current from the second battery, and an nth battery current from the nth battery.Type: ApplicationFiled: April 5, 2023Publication date: October 10, 2024Inventors: Mahitha Velagapudi, Stephen John Fedigan, Eric C. Maugans
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Publication number: 20240339857Abstract: A battery staging system including a first and second battery in operative communication with each other and an electrical load; a boost controller in operative communication with the first and second battery; an inductor in operative communication with the boost controller, the first battery, a ground and the second battery; the inductor connected between first battery and ground for a predetermined time to obtain an inductor current; the boost controller is configured to pull a first battery current and drive it into the second battery responsive to the predetermined inductor current; the inductor being connected to the second battery responsive to the inductor obtaining the predetermined inductor current; the inductor is reconnected between the first battery and the ground before the inductor current reaches zero; and the boost controller configured to pull the first battery current from the first battery until the first battery voltage reaches a target voltage.Type: ApplicationFiled: April 5, 2023Publication date: October 10, 2024Inventors: Stephen John Fedigan, Mahitha Velagapudi, Dale E. Brech
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Publication number: 20240339847Abstract: A power management unit architecture including a set of batteries connected to a load via a bus; a controller in operative communication with the batteries; a telemetry unit in operative communication with the controller and the batteries; at least one power switch in operative communication with the controller, the batteries and the bus; a squib unit operatively connected to the batteries; wherein the controller is configured to pull a battery current from a first battery and drive the first battery current into a second battery responsive to a predetermined current.Type: ApplicationFiled: April 5, 2023Publication date: October 10, 2024Inventors: Stephen John Fedigan, Mahitha Velagapudi, Grant Allen Sweer, Derek L. Budisalich, Eric C. Maugans, Andrew Thompson
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Publication number: 20240339846Abstract: A power management unit having battery switchover topology including a first battery in operative communication with a first battery first power switch in parallel with a first battery second power switch, and in operative communication with a first battery power dump unit; a second battery in operative communication with a second battery first power switch in parallel with a second battery second power switch, and in operative communication with a second battery power dump unit; an nth battery in operative communication with an nth battery first power switch in parallel with an nth battery second power switch; the first battery, the second battery and the nth battery are connected to a bus that supplies an electrical load; and the electrical load being supplied sequentially by a first battery current from the first battery, a second battery current from the second battery, and an nth battery current from the nth battery.Type: ApplicationFiled: April 5, 2023Publication date: October 10, 2024Inventors: Mahitha Velagapudi, Stephen John Fedigan, Eric C. Maugans
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Patent number: 12042829Abstract: For surface wetting control, an apparatus can expel fluid from a droplet on a surface using a transducer mechanically coupled to the surface. A first area of the surface can have a first wettability for the fluid, and a second area of the surface can have a second wettability for the fluid. The first wettability of the first area of the surface can be greater than the second wettability of the second area of the surface. The first area and the second area can have a patterned arrangement.Type: GrantFiled: September 14, 2020Date of Patent: July 23, 2024Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Daniel Lee Revier, Benjamin Stassen Cook, David Patrick Magee, Stephen John Fedigan
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Patent number: 11693235Abstract: An apparatus includes a mass detection circuit coupled to a surface covered with a plurality of electrodes. The mass detection circuit is configured to detect a mass of a first droplet present on the surface. The apparatus further includes a transducer circuit coupled to a transducer, which is coupled to the surface and form a lens unit. The transducer circuit configured to excite a first vibration of the surface at a resonant frequency to form a high displacement region on the surface. The apparatus also includes a voltage excitation circuit coupled to the plurality of electrodes. In response to the detection of the mass of the first droplet, the voltage excitation circuit is configured to apply a sequence of differential voltages on one or more consecutive electrodes which moves the first droplet to the high displacement region.Type: GrantFiled: February 2, 2021Date of Patent: July 4, 2023Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Daniel Lee Revier, Benjamin Stassen Cook, David Patrick Magee, Stephen John Fedigan
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Publication number: 20230161154Abstract: A lens structure system with a lens structure and a multi-segmented transducer coupled to the lens structure. Each segment in the plurality of segments has a first conductor and a second conductor, wherein the first conductor and the second conductor are electrically coupled to the segment. The system also has circuitry for applying a voltage to selected segments in the plurality of segments with standing wave signals and traveling wave signals.Type: ApplicationFiled: January 24, 2023Publication date: May 25, 2023Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Yunhong Li, David Magee, Stephen John Fedigan
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Patent number: 11607704Abstract: Methods and apparatus for electrostatic control of expelled material for lens cleaners are disclosed. In certain described examples, an apparatus can expel fluid by atomization from a central area of the surface using an ultrasonic transducer mechanically coupled to the surface. A first electrode can be arranged relative to the central area of the surface. A second electrode can be located in a peripheral area relative to the central area of the surface, in which a voltage can be applied between the first and second electrodes to attract atomized fluid at the peripheral area.Type: GrantFiled: April 20, 2017Date of Patent: March 21, 2023Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Benjamin Stassen Cook, Daniel Lee Revier, Stephen John Fedigan, David Patrick Magee
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Patent number: 11561390Abstract: A lens structure system with a lens structure and a multi-segmented transducer coupled to the lens structure. Each segment in the plurality of segments has a first conductor and a second conductor, wherein the first conductor and the second conductor are electrically coupled to the segment. The system also has circuitry for applying a voltage to selected segments in the plurality of segments with standing wave signals and traveling wave signals.Type: GrantFiled: October 7, 2020Date of Patent: January 24, 2023Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Yunhong Li, David Patrick Magee, Stephen John Fedigan
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Patent number: 11420238Abstract: In described examples, a transducer vibrates a lens element in a heating mode and a cleaning mode. Controller circuitry activates the transducer in the heating mode in response to an estimated temperature, and activates the transducer in the cleaning mode after the transducer is activated in the heating mode.Type: GrantFiled: February 27, 2018Date of Patent: August 23, 2022Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: David Patrick Magee, Stephen John Fedigan
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Patent number: 11415795Abstract: A lens structure system includes a lens structure and a multi-segmented transducer coupled to the lens structure. The multi-segmented transducer includes segments. Each segment is electrically coupled to a respective first conductor and a respective second conductor.Type: GrantFiled: March 30, 2020Date of Patent: August 16, 2022Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Stephen John Fedigan, David Patrick Magee, Yunhong Li
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Patent number: 11366076Abstract: In described examples, one or more devices include: apparatus including a lens element and a transducer to vibrate the lens element at an operating frequency when operating in an activated state; and controller circuitry. The controller circuitry is arranged to measure an impedance of the apparatus, to determine an estimated temperature of the apparatus in response to the measured impedance, to compare the estimated temperature against a temperature threshold for delineating an operating temperature range of the apparatus, and to toggle an activation state of the transducer in response to comparing the estimated temperature against the temperature threshold.Type: GrantFiled: May 26, 2020Date of Patent: June 21, 2022Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: David Patrick Magee, Stephen John Fedigan
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Patent number: 11300781Abstract: An apparatus for mitigating contamination of an optical device comprises an open-topped, closed-sided, and closed-bottomed housing cup partially defining a protected volume to enclose the optical device. A housing cap encloses a top of the housing cup and partially defines the protected volume. The housing cap includes a top collar having an open central aperture. A top cover laterally spans the central aperture of the top collar. An interface structure circumscribes the top cover to suspend the top cover downwardly into the housing cup from the top collar. The interface structure prevents direct contact between the top cover and the top collar.Type: GrantFiled: February 4, 2020Date of Patent: April 12, 2022Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Stephen John Fedigan, David Patrick Magee
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Patent number: 11237387Abstract: Disclosed examples include lens cleaning systems, drivers and operating methods, including a transducer mechanically coupled to a lens, a driver to provide an oscillating drive signal to the transducer and a controller to control the drive signal frequency to vibrate the lens at frequencies in a range of interest. The controller determines a measured resonant frequency of the lens cleaning system in the range of interest according to a transducer feedback signal and selectively performs a lens cleaning operation if the measured resonant frequency differs from a baseline resonant frequency of the lens cleaning system for a clean lens.Type: GrantFiled: May 1, 2017Date of Patent: February 1, 2022Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: David Patrick Magee, Stephen John Fedigan
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Patent number: 11042026Abstract: In described examples, a transducer vibrates a lens element at a first frequency and a different second frequency. Controller circuitry selects one of a cleaning mode and a heating mode in response to an estimated temperature of the lens element. The controller circuitry activates the transducer to vibrate the lens element at the first frequency in response to the controller circuitry selecting the cleaning mode. The controller circuitry activates the transducer to vibrate the lens element at the second frequency in response to the controller circuitry selecting the heating mode.Type: GrantFiled: February 23, 2018Date of Patent: June 22, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Stephen John Fedigan, David Patrick Magee
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Publication number: 20210157130Abstract: An apparatus includes a mass detection circuit coupled to a surface covered with a plurality of electrodes. The mass detection circuit is configured to detect a mass of a first droplet present on the surface. The apparatus further includes a transducer circuit coupled to a transducer, which is coupled to the surface and form a lens unit. The transducer circuit configured to excite a first vibration of the surface at a resonant frequency to form a high displacement region on the surface. The apparatus also includes a voltage excitation circuit coupled to the plurality of electrodes. In response to the detection of the mass of the first droplet, the voltage excitation circuit is configured to apply a sequence of differential voltages on one or more consecutive electrodes which moves the first droplet to the high displacement region.Type: ApplicationFiled: February 2, 2021Publication date: May 27, 2021Inventors: Daniel Lee Revier, Benjamin Stassen Cook, David Patrick Magee, Stephen John Fedigan
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Patent number: 10908414Abstract: An apparatus includes a mass detection circuit coupled to a surface covered with a plurality of electrodes. The mass detection circuit is configured to detect a mass of a first droplet present on the surface. The apparatus further includes a transducer circuit coupled to a transducer, which is coupled to the surface and form a lens unit. The transducer circuit configured to excite a first vibration of the surface at a resonant frequency to form a high displacement region on the surface. The apparatus also includes a voltage excitation circuit coupled to the plurality of electrodes. In response to the detection of the mass of the first droplet, the voltage excitation circuit is configured to apply a sequence of differential voltages on one or more consecutive electrodes which moves the first droplet to the high displacement region.Type: GrantFiled: May 10, 2017Date of Patent: February 2, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Daniel Lee Revier, Benjamin Stassen Cook, David Patrick Magee, Stephen John Fedigan
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Publication number: 20210018748Abstract: A lens structure system with a lens structure and a multi-segmented transducer coupled to the lens structure. Each segment in the plurality of segments has a first conductor and a second conductor, wherein the first conductor and the second conductor are electrically coupled to the segment. The system also has circuitry for applying a voltage to selected segments in the plurality of segments with standing wave signals and traveling wave signals.Type: ApplicationFiled: October 7, 2020Publication date: January 21, 2021Inventors: Yunhong Li, David Patrick Magee, Stephen John Fedigan
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Publication number: 20200406316Abstract: For surface wetting control, an apparatus can expel fluid from a droplet on a surface using a transducer mechanically coupled to the surface. A first area of the surface can have a first wettability for the fluid, and a second area of the surface can have a second wettability for the fluid. The first wettability of the first area of the surface can be greater than the second wettability of the second area of the surface. The first area and the second area can have a patterned arrangement.Type: ApplicationFiled: September 14, 2020Publication date: December 31, 2020Inventors: Daniel Lee Revier, Benjamin Stassen Cook, David Patrick Magee, Stephen John Fedigan