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公开(公告)号：US20180014120A1
公开(公告)日：2018-01-11
申请号：US15547836
申请日：2016-02-01
Inventor： Jason William LAWRENCE , Roberto NAPOLI , Roger David SERWY , Jie SU , Stefan WILLIAMS , Rong HU , Firas AZRAI
IPC: H04R3/00 , G10L21/0272 , H04R3/04 , H04R29/00
CPC classification number: H04R3/007 , G10L21/0272 , H04R3/04 , H04R29/001 , H04R2430/01
Abstract: This application describes methods and apparatus for loudspeaker protection. A loudspeaker protection system (1100) is described having a first frequency band-splitter (102) for splitting an input audio signal (Vin) into a plurality of audio signals (v1, v2 . . . ,vn) in different respective frequency bands (ω1, ω2 . . . ωη). A first gain block (103) is configured to apply a respective frequency band gain (gt1, gt2 . . . ,gt3) to each of the audio signals in the different respective frequency bands and a gain controller (109; 1101) is provided for controlling the respective band gains. A thermal controller (1101) determines, for each of a plurality of the different respective frequency bands, a power dissipation for the loudspeaker in that frequency band and also determines a respective thermal gain setting based on the determined power dissipation for that frequency band. The gain controller is configured to control the respective frequency band gains based on the thermal gain settings.
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公开(公告)号：US20170359652A1
公开(公告)日：2017-12-14
申请号：US15463377
申请日：2017-03-20
Inventor： Roger SERWY , Jason W. LAWRENCE , Firas AZRAI
CPC classification number: H04R3/007 , H03F3/183 , H03F3/21 , H03F2200/03 , H03F2200/102 , H03G3/007 , H03G3/301 , H04R3/04 , H04R29/001
Abstract: A predictive brownout prevention system may be configured to prevent brownout of an audio output signal. Particularly, the brownout prevention system may be configured to receive information indicative of an amplitude of the audio input signal, receive information indicative of a condition of the power supply, receive information indicative of one or more of the following: 1) adaptive estimates of power supply conditions; 2) anticipated effects of power supply capacitance; and 3) condition of a load impedance, determine from the received information whether a brownout condition exists, and responsive to determining the brownout condition exists, generate the selectable attenuation signal to reduce an amplitude of the audio output signal such that the signal path attenuates the audio input signal or a derivative thereof in order to prevent brownout prior to propagation to the audio output of a portion of the audio input signal having the brownout condition.
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公开(公告)号：US20200044611A1
公开(公告)日：2020-02-06
申请号：US16600621
申请日：2019-10-14
Inventor： Jeffrey Allen MAY , Eric J. KING , Firas AZRAI
Abstract: In accordance with embodiments of the present disclosure, a system may include a circuit having a power converter and an amplifier, wherein the power converter is configured to generate an intermediate voltage, provide the intermediate voltage as an amplifier supply voltage to the amplifier, and share the intermediate voltage with one or more additional circuits external to the circuit, wherein at least one of the one or more additional circuits is configured to generate the intermediate voltage.
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公开(公告)号：US20180206034A1
公开(公告)日：2018-07-19
申请号：US15918705
申请日：2018-03-12
Inventor： Roger SERWY , Jason W. LAWRENCE , Firas AZRAI , Jeffrey Allen MAY , Jie SU
CPC classification number: H04R3/007 , H03F1/52 , H03F3/183 , H03F3/21 , H03F2200/03 , H03F2200/211 , H04R1/1041 , H04R3/00 , H04R29/001 , H04R2430/01 , H04R2460/03
Abstract: A predictive brownout prevention system may be configured to prevent brownout of an audio output signal. Particularly, the brownout prevention system may be configured to receive information indicative of adaptive estimates of power supply conditions, wherein the information indicative of adaptive estimates of the power supply conditions comprises information regarding a voltage component and a resistive component received from an adaptive battery model of a battery for providing electrical energy to a power supply for generating the power supply voltage and adapt the adaptive battery model based on a monitored battery voltage output by the battery and loading events of the signal path and excluding loading events of components other than the signal path which are powered from the battery.
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Patent Agency Ranking
公开(公告)号：US20180115246A1
公开(公告)日：2018-04-26
申请号：US15650378
申请日：2017-07-14
Inventor： Firas AZRAI , Eric J. KING , Aaron J. BRENNAN
CPC classification number: H02M3/1582 , G06F1/26 , H02J7/0065 , H02M1/143 , H02M3/07 , H02M3/156 , H02M3/158 , H02M3/335 , H02M2001/007
Abstract: In accordance with embodiments of the present disclosure, a system may include a series combination of a boost converter and a power converter coupled together in series, such that the series combination boosts an input voltage to the series combination to an output voltage greater than the input voltage such that a voltage boost provided by the series combination is greater than a voltage boost provided by the boost converter alone. The system may also include an amplifier, wherein an input of the amplifier is coupled to an output of the series combination of the boost converter and the power converter.
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公开(公告)号：US20180014121A1
公开(公告)日：2018-01-11
申请号：US15547850
申请日：2016-02-01
Inventor： Jason William LAWRENCE , Roberto NAPOLI , Roger SERWY , Jie SU , Stefan WILLIAMS , Rong HU , Firas AZRAI
IPC: H04R3/00 , G10L21/0272 , H04R3/04 , H04R29/00
CPC classification number: H04R3/007 , G10L21/0272 , H04R3/04 , H04R29/001 , H04R2430/01
Abstract: This application describes methods and apparatus for loudspeaker protection. A loudspeaker protection system (100) is described having a first frequency band-splitter (102) for splitting an input audio signal (Vin) into a plurality of audio signals (v1, v2 . . . , vn) in different respective frequency bands (ω1, ω2 . . . , ωn). A first gain block (103) is configured to apply a respective frequency band gain (g1, g2 . . . , g3) to each of the audio signals in the different respective frequency bands and a gain controller (107, 108, 109) is provided for controlling the respective band gains. A displacement modeller (104, 105) determines a plurality of displacement signals (x1, x2 . . . , xn) based on the input audio signal (Vin) and a displacement model (104a) where each displacement signal corresponds to a modelled cone displacement for the loudspeaker for one of said different respective frequency bands. The gain controller (107, 108, 109) is configured to control the respective frequency band gains based on the plurality of displacement signals.
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公开(公告)号：US20170346446A1
公开(公告)日：2017-11-30
申请号：US15582861
申请日：2017-05-01
Inventor： Jeffrey Allen MAY , Eric J. KING , Firas AZRAI
Abstract: In accordance with embodiments of the present disclosure, a system may include a circuit having a power converter and an amplifier, wherein the power converter is configured to generate an intermediate voltage, provide the intermediate voltage as an amplifier supply voltage to the amplifier, and share the intermediate voltage with one or more additional circuits external to the circuit, wherein at least one of the one or more additional circuits is configured to generate the intermediate voltage.
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公开(公告)号：US20170310280A1
公开(公告)日：2017-10-26
申请号：US15349771
申请日：2016-11-11
Inventor： Jeffrey LaBUNDY , Anu CHAKRAVARTY , Deepal SHRISHRIMAL , Jeffrey Allen MAY , Firas AZRAI
CPC classification number: H03F1/0216 , H03F1/0211 , H03F3/187 , H03F3/211 , H03F3/213 , H03F3/2175 , H03F3/68 , H03F2200/03 , H03F2200/228 , H03F2200/321 , H03F2200/462 , H03F2200/471 , H03F2200/504 , H03F2200/511 , H04R3/12
Abstract: In accordance with embodiments of the present disclosure a control circuit may include at least one input for monitoring a respective signal for each of a plurality of amplifiers, an output for outputting at least one control signal for controlling a power supply level of the single signal-variant power supply configured to deliver electrical energy to the plurality of amplifiers, and decision and control logic. The decision and control logic may be configured to monitor the respective signals for each of the plurality of amplifiers and, based on the respective signals, and a respective requirement associated with each of the plurality of amplifiers, setting a power supply level of the single signal-variant power supply and outputting the at least one control signal to control the power supply level such that the respective requirements are satisfied.
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公开(公告)号：US20170142518A1
公开(公告)日：2017-05-18
申请号：US15342846
申请日：2016-11-03
Inventor： Jeffrey Allen MAY , Firas AZRAI
CPC classification number: H04R3/04 , H03G3/007 , H03G3/3005 , H03G7/002 , H03G7/007 , H04R29/001
Abstract: A method may include receiving information indicative of an amplitude of an audio output signal, receiving information indicative of a predicted voltage of a power supply of a signal path having an audio input for receiving an audio input signal and an audio output for generating the audio output signal based on the audio input signal, predicting from the information indicative of the amplitude of the audio output signal and the information indicative of the predicted voltage of the power supply whether the audio output signal will exceed an available supply voltage generated by the power supply, and responsive to determining the audio output signal will exceed the available supply voltage generated by the power supply, attenuating the audio input signal or a derivative thereof to reduce the amplitude of the audio output signal such that the audio output signal does not exceed the available supply voltage of the power supply.
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