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公开(公告)号：US11366076B2
公开(公告)日：2022-06-21
申请号：US16883165
申请日：2020-05-26
Applicant: Texas Instruments Incorporated
Inventor： David Patrick Magee , Stephen John Fedigan
Abstract: 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.
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公开(公告)号：US11300781B2
公开(公告)日：2022-04-12
申请号：US16781506
申请日：2020-02-04
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , David Patrick Magee
Abstract: 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.
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公开(公告)号：US10780467B2
公开(公告)日：2020-09-22
申请号：US15492433
申请日：2017-04-20
Applicant: Texas Instruments Incorporated
Abstract: Methods and apparatus for surface wetting control are disclosed. In certain described examples, 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 be arranged in a patterned arrangement.
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公开(公告)号：US20200282436A1
公开(公告)日：2020-09-10
申请号：US16827344
申请日：2020-03-23
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , David Patrick Magee
Abstract: 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.
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5.发明授权公开(公告)号：US10682675B2
公开(公告)日：2020-06-16
申请号：US15497624
申请日：2017-04-26
Applicant: Texas Instruments Incorporated
Inventor： David Patrick Magee , Stephen John Fedigan
Abstract: Lens cleaning systems, drivers and methods to detect faults or degradation in a lens cleaning system, including a controller to control a lens transducer drive signal frequency to vibrate the lens in a frequency range of interest and measure frequency response values according to driver feedback signals, and to compare the measured frequency response values to baseline frequency response values for a healthy system, and to selectively determine the existence of a fault or degradation in the lens cleaning system according to dissimilarities between the measured frequency response values and the baseline frequency response values.
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Patent Agency Ranking
公开(公告)号：US10663519B2
公开(公告)日：2020-05-26
申请号：US16208344
申请日：2018-12-03
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan
IPC: G01R31/34
Abstract: An example fault detection circuit includes: a positive sequence voltage calculator to calculate a positive sequence voltage value for a three-phase motor; a positive sequence current calculator to calculate a positive sequence current value for the three-phase motor; an interpolator to calculate an expected negative sequence voltage value based on the positive sequence voltage value, the positive sequence current value, and measured characteristics of the three-phase motor; a negative sequence voltage calculator to calculate a measured negative sequence voltage value for the three-phase motor; and a fault detector to detect that a winding fault exists in the three-phase motor when a difference between the expected negative sequence voltage value and the measured negative sequence voltage value satisfies a threshold.
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公开(公告)号：US10598926B2
公开(公告)日：2020-03-24
申请号：US15696752
申请日：2017-09-06
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , David Patrick Magee
Abstract: 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. The top collar includes at least one drain channel extending longitudinally downward into a top collar top surface and extending across the top collar top surface laterally outward from the 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.
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公开(公告)号：US09973132B2
公开(公告)日：2018-05-15
申请号：US15200683
申请日：2016-07-01
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , Sandun Shivantha Kuruppu , Paul LeRoy Brohlin
CPC classification number: H02P27/06 , G01R27/16 , G01R31/343 , H02H7/0822 , H02P6/185 , H02P29/0241
Abstract: A motor control circuit includes a processor configured to calculate a plurality of motor impedances from measurements of an excitation voltage on a power bus to a motor and measurements of a plurality of currents through the motor resulting from the excitation voltage, and the processor configured to calculate individual winding inductances in the motor, based on the measured motor impedances, and configured to determine whether there is an inter-turn winding fault based on the calculated individual winding inductances.
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公开(公告)号：US09225264B1
公开(公告)日：2015-12-29
申请号：US14468867
申请日：2014-08-26
Applicant: Texas Instruments Incorporated
Inventor： Stephen John Fedigan , Paul LeRoy Brohlin
IPC: H02M7/537 , H02M7/5395
CPC classification number: H02M7/5395 , H02M7/53875 , H02M2001/0009
Abstract: Systems, apparatus and methods are presented for multiphase inverter control in which PWM switching control signals are generated for operating inverter switching devices according to current feedback values, and a given inverter phase is identified in a given PWM switching cycle having the lowest low side duty cycle on-time. A phase current feedback value is selectively computed for the identified phase at least partially according to the low side current shunt voltage values corresponding to other output phases, and the phase current feedback values are updated with the computed phase current feedback value and the low side current shunt voltage values of the remaining output phases to provide feedback for closed loop PWM switching control.
Abstract translation: 提出了用于多相逆变器控制的系统，装置和方法，其中根据电流反馈值为操作逆变器开关装置产生PWM开关控制信号，并且给定的反相器相位在具有最低低边占空比的给定PWM开关周期中被识别 准时。 根据与其他输出相位相对应的低侧电流分流电压值，至少部分地针对所识别的相位选择性地计算相电流反馈值，并且用计算出的相电流反馈值和低侧电流来更新相电流反馈值 分流剩余输出相的电压值，为闭环PWM开关控制提供反馈。
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10.发明申请公开(公告)号：US20210018748A1
公开(公告)日：2021-01-21
申请号：US17064645
申请日：2020-10-07
Applicant: Texas Instruments Incorporated
Inventor： Yunhong Li , David Patrick Magee , Stephen John Fedigan
Abstract: 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.
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