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公开(公告)号：US11916526B2
公开(公告)日：2024-02-27
申请号：US17945517
申请日：2022-09-15
Inventor： John P. Lesso , Craig Alexander Anderson
Abstract: A method of equalising an audio signal derived from a microphone, the method comprising: receiving the audio signal; applying an order-statistic filter to the audio signal in the frequency domain to generate a statistically filtered audio signal; equalising the received audio signal based on the statistically filtered audio signal to generate an equalised audio signal.
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公开(公告)号：US11889280B2
公开(公告)日：2024-01-30
申请号：US17749603
申请日：2022-05-20
Inventor： John P. Lesso
Abstract: An apparatus, comprising: an audio input for receiving an input audio signal; an tuning input for receiving a tuning signal; a filter chain comprising a plurality of filters for filtering the audio signal to produce a filtered input audio signal, the filter chain comprising: a first filter module operating at a first sampling rate; and a second filter module operating at a second sampling rate greater than the first sampling rate, wherein a phase response of the first filter module is dependent on the tuning input and wherein a magnitude response of the first filter module is substantially independent of the tuning input.
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公开(公告)号：US11871193B2
公开(公告)日：2024-01-09
申请号：US18176555
申请日：2023-03-01
Inventor： John P. Lesso , Thomas I. Harvey
CPC classification number: H04R3/04 , H03G5/165 , H04R1/08 , H04R1/1016 , H04R1/1041 , H04R3/02
Abstract: A microphone system, comprises a first transducer, for generating a first acoustic signal, and a second transducer, for generating a second acoustic signal. A high-pass filter receives the first signal and generates a first filtered signal, and a low-pass filter receives the second signal and generates a second filtered signal. An adder forms an output signal of the microphone system as a sum of the first filtered signal and the second filtered signal.
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24.发明授权公开(公告)号：US11832523B2
公开(公告)日：2023-11-28
申请号：US17075255
申请日：2020-10-20
Inventor： John P. Lesso
IPC: H01L41/04 , H01L41/107 , H10N30/80 , H10N30/40
CPC classification number: H10N30/804 , H10N30/40
Abstract: The present disclosure relates to circuitry for driving a piezoelectric transducer. The circuitry may be implemented as an integrated circuit and comprises driver circuitry configured to supply a drive signal to the piezoelectric transducer to cause the transducer to generate an output signal and active inductor circuitry configured to be coupled with the piezoelectric transducer. The active inductor circuitry may be tuneable to adjust a frequency characteristic of the output signal.
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公开(公告)号：US11811312B2
公开(公告)日：2023-11-07
申请号：US17845007
申请日：2022-06-21
Inventor： John P. Lesso , Peter J. Frith , John L. Pennock
CPC classification number: H02M3/07 , H02M1/00 , H02M3/072 , H03F3/181 , H02M1/009 , H02M1/0083 , H02M3/071
Abstract: A bipolar output charge pump circuit having a network of switching paths for selectively connecting an input node and a reference node for connection to an input voltage, a first pair of output nodes and a second pair of output nodes, and two pairs of flying capacitor nodes, and a controller for controlling the switching of the network of switching paths. The controller is operable to control the network of switching paths when in use with two flying capacitors connected to the two pairs of flying capacitor nodes, to provide a first bipolar output voltage at the first pair of output nodes and a second bipolar output voltage at the second pair of bipolar output nodes.
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Patent Agency Ranking
公开(公告)号：US11722057B2
公开(公告)日：2023-08-08
申请号：US17494424
申请日：2021-10-05
Inventor： John P. Lesso , Peter J. Frith , John L. Pennock
Abstract: A bipolar output charge pump circuit having a network of switching paths for selectively connecting an input node and a reference node for connection to an input voltage, a first pair of output nodes, two pairs of flying capacitor nodes, and a controller for controlling the switching of the network of switching paths. The controller is operable to control the network of switching paths when in use with two flying capacitors connected to the two pairs of flying capacitor nodes, to provide a first mode and a second mode when in use with two flying capacitors connected to the flying capacitor nodes, wherein at least the first mode corresponds to a bipolar output voltage of +/−3VV, +/−VV/5 or +/−VV/6.
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公开(公告)号：US11652406B2
公开(公告)日：2023-05-16
申请号：US17494426
申请日：2021-10-05
Inventor： John P. Lesso , Peter J. Frith , John L. Pennock
Abstract: A bipolar output charge pump circuit having a network of switching paths for selectively connecting an input node and a reference node for connection to an input voltage, a first pair of output nodes, two pairs of flying capacitor nodes, and a controller for controlling the switching of the network of switching paths. The controller is operable to control the network of switching paths when in use with two flying capacitors connected to the two pairs of flying capacitor nodes, to provide a first mode and a second mode when in use with two flying capacitors connected to the flying capacitor nodes, wherein at least the first mode corresponds to a bipolar output voltage of +/−3VV, +/−VV/5 or +/−VV/6.
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公开(公告)号：US11627401B2
公开(公告)日：2023-04-11
申请号：US17384057
申请日：2021-07-23
Inventor： John P. Lesso
Abstract: A method for on ear detection for a headphone, the method comprising: receiving a first microphone signal derived from a first microphone of the headphone and determining, from the first microphone signal, a first resonance frequency associated with an acoustic port of the first microphone, the first resonance frequency dependent on a first temperature at the first microphone; receiving a second microphone signal derived from a second microphone of the headphone and determining, from the second microphone signal, a second resonance frequency associated with an acoustic port of the second microphone, the second resonance frequency dependent on a second temperature at the second microphone.
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公开(公告)号：US11601760B2
公开(公告)日：2023-03-07
申请号：US17579283
申请日：2022-01-19
Inventor： John P. Lesso
IPC: H04R9/06 , H03H17/06 , H03K5/13 , H03K5/1534 , H03F3/217
Abstract: A system for driving a transducer having a plurality of coils, the system comprising: a modulator for outputting a digital output signal representative of a received analogue input signal at a modulator output; a clock controlled delay element for applying a delay to the digital output signal to generate a first delayed signal at a delay element output; wherein the modulator output is couplable to a first coil of the plurality of the coils of the transducer and the delay element output is couplable to a second coil of the plurality of coils of the transducer.
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公开(公告)号：US11534100B2
公开(公告)日：2022-12-27
申请号：US17094867
申请日：2020-11-11
Inventor： John P. Lesso
Abstract: A sensor on an earpiece is used to attempt to detect a signal corresponding to a heartbeat. If a heartbeat is detected, it can be determined that the earpiece is being worn by a user. The sensor may be an acoustic transducer on a surface of the earpiece that is located within the wearer's ear canal, while the earpiece is being worn normally.
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