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公开(公告)号：US20240313638A1
公开(公告)日：2024-09-19
申请号：US18646414
申请日：2024-04-25
摘要： A control circuit for a boost converter is provided. The control circuit includes switching means configured to switch the boost converter to perform cycles. Each cycle includes an energy charging state, in which an inductor stores energy provided by an input voltage, and an energy discharging state, in which the inductor provides energy to an output of the boost converter. The control circuit further includes comparison means configured to decide whether a current at the inductor is higher than a predetermined maximum current. The control circuit further includes off-time signal generation means configured to generate an off-time signal based on whether the current at the inductor is higher than a predetermined maximum current. The off-time signal determines a duration of a discharging state of a next switching event and the switching means is configured to switch the boost converter based on the generated off-time signal.
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公开(公告)号：US10991377B2
公开(公告)日：2021-04-27
申请号：US16411311
申请日：2019-05-14
IPC分类号： G10L21/00 , G10L21/0208 , G10L15/20 , G06F17/14 , G10L25/84 , G10L21/028
摘要： A mechanism to adjust far-end signal loudness based on environmental noise levels and device speaker characteristics has a noise-level analyzer that receives feedback from an intelligent speaker-boosting logic circuit that provides a signal to a class-D amplifier to drive the speaker. The noise-level analyzer analyzes near-end environmental noise levels and far-end speech input signal levels across critical frequency bands. The noise-level analyzer performs a masking analysis of the far-end and near-end signals, and guides the speaker-boosting logic circuit to apply determined signal boosting levels over selective bands. The speaker-boosting logic circuit monitors system activity along with the selective band boosting guidance from the noise-level analyzer. Using device speaker information and the speaker excursion pattern, the speaker-boosting logic circuit adjusts far-end speech signal loudness without over excursion of the speaker and damage to the speaker hardware.
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公开(公告)号：US20210126568A1
公开(公告)日：2021-04-29
申请号：US17139930
申请日：2020-12-31
发明人： Temujin GAUTAMA
IPC分类号： H02P25/034 , H02P6/182
摘要： An apparatus and a method for generating a voice coil actuator (VCA) signal is described. A drive signal is generated to drive the VCA and a resulting current signal from the VCA detected. The frequency of the drive signal is adapted in response to detecting an asymmetry in the current signal.
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公开(公告)号：US10993027B2
公开(公告)日：2021-04-27
申请号：US15359358
申请日：2016-11-22
发明人： Temujin Gautama
摘要： A controller for an audio system. The audio system comprising an audio processor and an amplifier. The controller is configured to: receive an amplifier-operating-condition-signal representative of an operating condition of the amplifier; receive a maximum-threshold-value; and generate control signaling based on the amplifier-operating-condition-signal and the maximum-threshold-value, wherein the control signaling is configured to set an operating parameter of the audio processor.
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公开(公告)号：US10909819B2
公开(公告)日：2021-02-02
申请号：US16400480
申请日：2019-05-01
摘要： A controller for a haptic actuator is described. The controller includes a driver which has an output configured to be coupled to a linear resonant actuator in a first mode and a frequency detector having an input configured to be coupled to the haptic actuator in a second mode. The frequency detector is configured to detect a signal generated on the terminals of the haptic actuator in response to an externally applied force and to determine a resonant frequency of the haptic actuator from the generated signal.
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6.发明公开公开(公告)号：US20240329099A1
公开(公告)日：2024-10-03
申请号：US18742617
申请日：2024-06-13
CPC分类号： G01R19/0023 , G01R15/04 , H03F3/45475
摘要： Voltage sense circuit for measuring a load connected to a power amplifier, the load configured to receive a first and second voltage in opposite phase, the voltage sense circuit comprises a first input terminal coupled to the first voltage, a second input terminal coupled to the second voltage, a first voltage divider circuit comprising an input coupled to the first input terminal and an output coupled to the first output terminal, a second voltage divider circuit comprising an input coupled to the second input terminal and an output coupled to the second output terminal and a driver circuit comprising a first input configured to receive a reference voltage, a second input configured to receive a common mode signal of first and second voltage divider circuits, and an output to drive an output common mode voltage of the first and the second voltage divider circuits with the reference voltage.
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公开(公告)号：US11768541B2
公开(公告)日：2023-09-26
申请号：US17707233
申请日：2022-03-29
CPC分类号： G06F3/016 , G06F3/16 , H03F1/30 , H04R3/04 , H03F2200/03 , H03G3/3005
摘要： An audio-haptic signal generator for a haptic system including an amplifier coupled to a haptic actuator is described. The audio-haptic signal generator includes an audio input configured to receive an audio signal; a haptic input configured to receive a haptic signal and a controller configured to receive to at least one of the haptic signal, an amplifier state and a haptic actuator state. A mixer is coupled to the audio input and the haptic input. The mixer has an output configured to be coupled to a haptic actuator. The controller controls the mixer to process the audio signal dependent on at least one of a characteristic of the haptic signal, an amplifier state, and a haptic actuator state. The mixer is configured to mix the haptic signal and processed audio signal on to output the mixed haptic signal and processed audio signal.
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公开(公告)号：US11315587B2
公开(公告)日：2022-04-26
申请号：US16143601
申请日：2018-09-27
IPC分类号： G10L21/0216 , G10L21/0264 , G06N20/00 , G10L21/02 , H04R3/00 , G06N3/04 , G06N3/08 , G10L21/0208 , G10L25/30
摘要： A signal processor for performing signal enhancement, the signal processor comprising: an input-terminal, configured to receive an input-signaling; an output-terminal; an interference-cancellation-block configured to receive the input-signaling and to provide an interference-estimate-signaling and an interference-cancelled-signal based on the input-signaling. The signal processor further comprises a feature-block configured to provide a combination-feature-signal based on the interference-cancelled-signal and the interference-estimate-signaling; and a neural-network-block configured to apply model parameters to the combination-feature-signal to provide a neural-network-output-signal to the output-terminal.
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公开(公告)号：US20240235367A1
公开(公告)日：2024-07-11
申请号：US18616586
申请日：2024-03-26
CPC分类号： H02M1/08 , H02M1/0025 , H02M3/158
摘要： A control circuit for a boost converter wherein the control circuit comprises switching means configured to switch the boost converter to perform cycles wherein each cycle comprises an energy charging state in which an inductor stores energy provided by an input voltage and an energy discharging state in which the inductor provides energy to an output of the boost converter, comparison means configured to decide whether a frequency of a switching event is lower than a predetermined minimum frequency and on-time signal generation means configured to generate an on-time signal based on whether a frequency of a switching event is lower than a predetermined minimum frequency, wherein the on-time signal determines a duration of a charging state of a next switching event and wherein the switching means is configured to switch the boost converter based on the generated on-time signal.
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公开(公告)号：US20220221937A1
公开(公告)日：2022-07-14
申请号：US17707233
申请日：2022-03-29
摘要： An audio-haptic signal generator for a haptic system including an amplifier coupled to a haptic actuator is described. The audio-haptic signal generator includes an audio input configured to receive an audio signal; a haptic input configured to receive a haptic signal and a controller configured to receive to at least one of the haptic signal, an amplifier state and a haptic actuator state. A mixer is coupled to the audio input and the haptic input. The mixer has an output configured to be coupled to a haptic actuator. The controller controls the mixer to process the audio signal dependent on at least one of a characteristic of the haptic signal, an amplifier state, and a haptic actuator state. The mixer is configured to mix the haptic signal and processed audio signal on to output the mixed haptic signal and processed audio signal.
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