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公开(公告)号：US11814284B2
公开(公告)日：2023-11-14
申请号：US16825593
申请日：2020-03-20
Inventor： Roberto Brioschi , Rkia Achehboune
CPC classification number: B81C1/0023 , B81B3/0021 , B81C1/00253 , H01L24/19 , H04R19/005 , B81B2201/0257 , B81B2201/0264 , B81B2203/0127 , H01L2924/1461 , H04R2201/003
Abstract: The application relates to structures, e.g. substrates for supporting semiconductor die. The substrate defines a frame which lateral surrounds one or more die and is provided in contact with at least one side surface of the die, wherein the frame defines upper and lower surfaces of the substrate.
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公开(公告)号：US11810544B2
公开(公告)日：2023-11-07
申请号：US17705974
申请日：2022-03-28
Inventor： Brenton Steele
IPC: G10K11/178 , H04R3/00
CPC classification number: G10K11/17881 , H04R3/002 , H04R3/007 , G10K2210/1081 , G10K2210/3028 , G10K2210/3226
Abstract: Embodiments generally relate to a signal processing device for on ear detection for a headset. The device comprises a first microphone input for receiving a microphone signal from a first microphone, the first microphone being configured to be positioned inside an ear of a user when the user is wearing the headset; a second microphone input for receiving a microphone signal from a second microphone, the second microphone being configured to be positioned outside the ear of the user when the user is wearing the headset; and a processor. The processor is configured to receive microphone signals from each of the first microphone input and the second microphone input; pass the microphone signals through a first filter to remove low frequency components, producing first filtered microphone signals; combine the first filtered microphone signals to determine a first on ear status metric; pass the microphone signals through a second filter to remove high frequency components, producing second filtered microphone signals; combine the second filtered microphone signals to determine a second on ear status metric; and combine the first on ear status metric with the second on ear status metric to determine the on ear status of the headset.
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公开(公告)号：US11804813B2
公开(公告)日：2023-10-31
申请号：US17386287
申请日：2021-07-27
Inventor： John Paul Lesso , Toru Ido
CPC classification number: H03G3/3089 , H03F1/26 , H03F1/32 , H03F1/34 , H03F3/187 , H03F3/217 , H03F3/2175 , H03G7/002 , H03G7/007 , H03F3/2171 , H03F3/2173 , H03F2200/102 , H03F2200/339 , H03F2200/432
Abstract: This application relates to Class D amplifier circuits. A modulator controls a Class D output stage based on a modulator input signal (Dm) to generate an output signal (Vout) which is representative of an input signal (Din). An error block, which may comprise an ADC, generates an error signal (ε) from the output signal and the input signal. In various embodiments the extent to which the error signal (ε) contributes to the modulator input signal (Dm) is variable based on an indication of the amplitude of the input signal (Din). The error signal may be received at a first input of a signal selector block. The input signal may be received at a second input of the signal selector block. The signal selector block may be operable in first and second modes of operation, wherein in the first mode the modulator input signal is based at least in part on the error signal; and in the second mode the modulator input signal is based on the digital input signal and is independent of the error signal. The error signal can be used to reduce distortion at high signal levels but is not used at low signal levels and so the noise floor at low signal levels does not depend on the component of the error block.
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公开(公告)号：US11792569B2
公开(公告)日：2023-10-17
申请号：US18101816
申请日：2023-01-26
Inventor： Anthony S. Doy , Eric J. King
IPC: H04R3/00 , H03K17/687 , H03F3/217
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：US11790220B2
公开(公告)日：2023-10-17
申请号：US18089020
申请日：2022-12-27
Inventor： John Paul Lesso
Abstract: The present disclosure relates to a neuron for an artificial neural network. The neuron comprises a dot product engine operative to: receive a set of weights; receive a set of data inputs based on a set of input data signals; and calculate the dot product of the set of data inputs and the set of weights to generate a dot product engine output. The neuron further comprises an activation function module arranged to apply an activation function to a signal indicative of the dot product engine output to generate a neuron output; and gain control circuitry. The gain control circuitry is operative to control: an input gain applied to the input data signals to generate the set of data inputs; and an output gain applied to the dot product engine output or by the activation function module. The output gain is selected to compensate for the applied input gain.
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Patent Agency Ranking
公开(公告)号：US11770064B2
公开(公告)日：2023-09-26
申请号：US17119553
申请日：2020-12-11
Inventor： Jason W. Lawrence , Eric J. King , Graeme G. MacKay
CPC classification number: H02M1/0025 , H02M1/0016 , H02M3/1566 , H02M3/1584 , H02M3/1586 , H02M1/00 , H02M1/0009 , H02M1/15 , H02M3/04 , H02M3/157 , H02M3/1582 , H02M1/0025 , H02M1/0016
Abstract: A system for controlling a current in a power converter configured to generate an output voltage may include a control loop having a plurality of comparators, each comparator having a respective reference voltage to which the output voltage is compared, a digital controller configured to calculate one or more pre-seeded control parameters for the current, and an analog state machine configured to, based on outputs of the plurality of comparators, select control parameters for controlling the current. The control parameters may be selected from the pre-seeded control parameters, control parameters for controlling the current to have a magnitude of zero, and control parameters for controlling the current to have a maximum magnitude.
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公开(公告)号：US11748462B2
公开(公告)日：2023-09-05
申请号：US17113917
申请日：2020-12-07
Inventor： John Paul Lesso
CPC classification number: G06F21/32 , G10L15/1815 , G10L15/22 , G10L15/30
Abstract: A method for authenticating a user of an electronic device is disclosed. The method comprises: responsive to detection of a trigger event indicative of a user interaction with the electronic device, generating an audio probe signal to play through an audio transducer of the electronic device; receiving a first audio signal comprising a response of the user's ear to the audio probe signal; receiving a second audio signal comprising speech of the user; and applying an ear biometric algorithm to the first audio signal and a voice biometric algorithm to the second audio signal to authenticate the user as an authorised user.
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公开(公告)号：US11735191B2
公开(公告)日：2023-08-22
申请号：US16451517
申请日：2019-06-25
Inventor： John Paul Lesso , John Laurence Melanson
CPC classification number: G10L17/20 , G10L17/02 , G10L17/04 , G10L17/22 , G10L25/15 , G10L25/84 , G10L25/90
Abstract: This application describes methods and apparatus for speaker recognition. An apparatus according to an embodiment has an analyzer for analyzing each frame of a sequence of frames of audio data which correspond to speech sounds uttered by a user to determine at least one characteristic of the speech sound of that frame. An assessment module determines, for each frame of audio data, a contribution indicator of the extent to which that frame of audio data should be used for speaker recognition processing based on the determined characteristic of the speech sound. Said contribution indicator comprises a weighting to be applied to each frame in the speaker recognition processing. In this way frames which correspond to speech sounds that are of most use for speaker discrimination may be emphasized and/or frames which correspond to speech sounds that are of least use for speaker discrimination may be de-emphasized.
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公开(公告)号：US11722107B2
公开(公告)日：2023-08-08
申请号：US17589047
申请日：2022-01-31
Inventor： John L. Melanson , Cory J. Peterson , Chandra Prakash , Ramin Zanbaghi , Eric Kimball
CPC classification number: H03F3/2178 , H03F1/26 , H03F3/187 , H03F2200/03
Abstract: Class-D amplifier circuits provide operation with low-distortion zero crossings outside of a unipolar power supply voltage range. The amplifiers include a first H-bridge driver circuit and a second H-bridge driver circuit. The class-D amplifier circuits also include a control circuit having an input for receiving an input signal to be reproduced by the class-D amplifier circuit. The control circuit has outputs coupled to inputs of the first and second H-bridge drivers, and includes one or more modulators. The control circuit selects between actively operating a selected one of the driver circuits or both, according to the signal to be reproduced, while setting an unselected driver circuit to turn either a high-side switch or a low-side switch of the unselected one of the first driver circuit or the second driver circuit fully on for at least some cycles of the one or more modulators.
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公开(公告)号：US11710475B2
公开(公告)日：2023-07-25
申请号：US17839938
申请日：2022-06-14
Inventor： John P. Lesso
Abstract: A method of modelling speech of a user of a headset comprising a microphone, the method comprising: receiving a first sample, from a bone-conduction sensor, representing bone-conducted speech of the user; obtaining a measure of fundamental frequency of the bone-conducted speech in each of a plurality of speech frames of the first sample; obtaining a first distribution of the fundamental frequencies of the bone-conducted speech over the plurality of speech frames; receiving, from the microphone, a second sample; determining a first acoustic condition at the headset based on the second signal; performing a biometric process based on the first distribution of fundamental frequencies and the first acoustic condition.
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