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公开(公告)号：US11296598B1
公开(公告)日：2022-04-05
申请号：US17192990
申请日：2021-03-05
Inventor： Eric J. King , Axel Thomsen , Anthony S. Doy , Thomas H. Hoff , John L. Melanson
Abstract: Driver circuitry for driving a load based on an input signal, comprising: at least one variable boost stage comprising: first and second input nodes configured to receive a first voltage and a second voltage respectively; first and second flying capacitor nodes for connection to a flying capacitor therebetween; a network of switching paths for selectively connecting the first and second input nodes with the first and second flying capacitor nodes; an output stage for selectively connecting a driver output node to each of the first and second flying capacitor nodes; and a controller operable in a first boost mode to: control the output stage to selectively connect the driver output node to the first flying capacitor node; control the network of switching paths to switch connection of the second flying capacitor node between the first and second input nodes at a controlled duty cycle; and in a first charge top-up cycle, control the network of switching paths to connect the first input node to the first flying capacitor node during a phase of the controlled duty cycle in which the first input node is connected to the second flying capacitor node; wherein the frequency of the controlled duty cycle is a greater than the frequency of the charge top-up cycle.
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公开(公告)号：US11277129B2
公开(公告)日：2022-03-15
申请号：US17314917
申请日：2021-05-07
Inventor： Axel Thomsen , Eric J. King , Anthony S. Doy , Thomas H. Hoff , John L. Melanson
IPC: H03B1/00 , H03K3/00 , H03K17/687 , H02N2/00 , H02M3/158
Abstract: This application relates to methods and apparatus for driving a transducer with switching drivers. A switching driver has first and second supply node for receiving supply voltages and includes an output bridge stage, a capacitor and a network of switches. The network of switches is operable in different switch states to provide different switching voltages to the output bridge stage. A controller is configured to control the switch state of the network of switches and a duty cycle of output switches of the output bridge stage based on an input signal to generate an output signal for driving the transducer.
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公开(公告)号：US11026035B1
公开(公告)日：2021-06-01
申请号：US16850184
申请日：2020-04-16
Inventor： Anthony S. Doy
Abstract: An audio output system for energizing a multiple voice coil transducer supplies at least two power output signals to the voice coils, a pilot tone generator for generating a pilot tone signal, and a power output circuit. The power output circuit generates power output signals from the pilot tone and the input signal so that the voice coils respond to the input signal with an in-phase electro-mechanical relationship and respond to the pilot tone with an out-of-phase (motion canceling) electro-mechanical relationship, reducing the effect of the pilot town on mechanical movement of the voice coil. A sensing circuit senses electrical signal values at terminals of the at least two voice coils, and a processing circuit detects a response of the output transducer to the pilot tone and determines at least one operating characteristic of the output transducer from the electrical signal values.
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公开(公告)号：US10942610B2
公开(公告)日：2021-03-09
申请号：US16831323
申请日：2020-03-26
Inventor： Siddharth Maru , Tejasvi Das , Luke Lapointe , Srdjan Marijanovic , Zhong You , Drew Kinney , Anthony S. Doy , Eric J. King
Abstract: A system may include a resistive-inductive-capacitive sensor, a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to at a plurality of periodic intervals, measure phase information associated with the resistive-inductive-capacitive sensor and based on the phase information, determine a displacement of a mechanical member relative to the resistive-inductive-capacitive sensor. The system may also include a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency and a driving amplitude, wherein at least one of the driving frequency and the driving amplitude varies among the plurality of periodic intervals.
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15.发明授权公开(公告)号：US10725549B2
公开(公告)日：2020-07-28
申请号：US16294347
申请日：2019-03-06
Inventor： Srdjan Marijanovic , Drew Kinney , Luke Lapointe , Siddharth Maru , Tejasvi Das , Anthony S. Doy , Zhong You
Abstract: A system may include a tactile actuator for providing tactile feedback and a resonant phase sensing system. The resonant phase sensing system may include a resistive-inductive-capacitive sensor and a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and the tactile actuator. The resistive-inductive-capacitive sensor may be configured to measure phase information associated with the resistive-inductive-capacitive sensor, based on the phase information, detect an indication of human interaction with the system proximate to the resistive-inductive-capacitive sensor, and trigger the tactile actuator to generate tactile feedback responsive to detecting the indication of human interaction.
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Patent Agency Ranking
公开(公告)号：US12295102B1
公开(公告)日：2025-05-06
申请号：US16299648
申请日：2019-03-12
Inventor： Zhong You , Emmanuel Marchais , Robert G. Kratsas , Anthony S. Doy
Abstract: A method may include forming an inductor comprising a plurality of inductor coils comprising a plurality of first inductor coils and a plurality of second inductor coils, each inductor coil comprising a spiraling wire of electrically-conductive material wherein the wire of electrically-conductive material is arranged substantially in a plane, wherein the plurality of first inductor coils and the plurality of second inductor coils are electrically coupled to one another and arranged with respect to one another such that within the plane, electrical current flowing through the inductor flows clockwise in the first inductor coils, within the plane, electrical current flowing through the inductor flows counterclockwise in the second inductor coils, each first inductor coil is adjacent to at least one second inductor coil, and each second inductor coil is adjacent to at least one first inductor coil.
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公开(公告)号：US12108223B2
公开(公告)日：2024-10-01
申请号：US18460218
申请日：2023-09-01
Inventor： Anthony S. Doy , Eric J. King
IPC: H04R3/00 , H03F3/217 , H03K17/687
CPC classification number: H04R3/00 , H03K17/687 , H03F3/217
Abstract: The application describes a switched driver (401) for outputting a drive signal at an output node (402) to drive a load such as a transducer. The driver receives respective high-side and low-side voltages (VinH, VinL) defining an input voltage at first and second input nodes and has connections for first and second capacitors (403H, 403L). A network of switching paths is configured such that each of the first and second capacitors can be selectively charged to the input voltage, the first input node can be selectively coupled to a first node (N1) by a path that include or bypass the first capacitor, and the second input node can be selectively coupled to a second node (N2) by a path that includes or bypasses the second capacitor. The output node (402) can be switched between two switching voltages at the first or second nodes. The driver is selectively operable in different operating modes, where the switching voltages are different in each of said modes.
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公开(公告)号：US11636742B2
公开(公告)日：2023-04-25
申请号：US17033110
申请日：2020-09-25
Inventor： Anthony S. Doy , Nermin Osmanovic , Carl L. Ståhl
Abstract: Embodiments described herein relate to methods and apparatus for outputting a haptic signal to a haptic transducer. A method for triggering a haptic signal being output to a haptic transducer comprises receiving an audio signal for output through an audio output transducer; determining whether the audio signal comprises a haptic trigger based on an indication of a rate of change of an amplitude of the audio signal, and responsive to determining that the audio signal comprises a haptic trigger, triggering the haptic signal to be output to the haptic transducer.
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19.发明授权公开(公告)号：US11159888B1
公开(公告)日：2021-10-26
申请号：US17025971
申请日：2020-09-18
Inventor： Ziyan Zou , Anthony S. Doy , Ning Li , Kaichow Lau , George E. Hardy , John L. Melanson
Abstract: Methods, systems, circuits and computer program products provide an output signal to drive an electromechanical transducer that selectively contains a cooling component when a thermal limit of a voice coil of the electromechanical transducer is exceeded and which air-cools the transducer by convection. An indication of a temperature of a voice coil of the electromechanical transducer is determined and compared with a thermal limit of the transducer. If the thermal limit of the transducer is exceeded by the indication of the temperature of the voice coil, the cooling component is introduced to the output signal that drives the transducer. The cooling component is a signal having a frequency within a low-frequency resonance portion of the response of the electromechanical transducer, so that additional air convection is caused at the transducer to remove heat from the voice coil due to the cooling component of the output signal.
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公开(公告)号：US11153682B1
公开(公告)日：2021-10-19
申请号：US17025960
申请日：2020-09-18
Inventor： Ning Li , George E. Hardy , Kaichow Lau , Anthony S. Doy , Ziyan Zou , John L. Melanson
Abstract: An audio output system for providing an output signal to a micro-speaker provides energy reduction and thermal protection by removing components of an input signal from which the output signal is generated, so that the audio power output system does not expend power reproducing portions of the audio information that would not be perceived by a listener. The micro-speaker has a resonant frequency such that substantial content of the audio information lies below the resonant frequency. A processing subsystem receives the audio information and generates the output signal by filtering the audio information with a response simulating the micro-speaker and an acoustic path to the listener, and comparing the filtered audio information with a frequency-dependent threshold of hearing. The processing subsystem then removes portions of the audio information that have an amplitude below the frequency-dependent threshold of hearing.
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