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公开(公告)号：US11410678B2
公开(公告)日：2022-08-09
申请号：US17149285
申请日：2021-01-14
Inventor： John P. Lesso , Edward V. Sinnott , Andrew I. Bothwell
Abstract: A method of detecting singing of a user of a personal audio device, the method comprising: receiving a first audio signal comprising bone-conducted speech of the user from a first transducer of the personal audio device; monitoring a second audio signal output to a speaker of the personal audio device; and determining whether the user is singing based on the first audio signal and the second audio signal.
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公开(公告)号：US11323810B2
公开(公告)日：2022-05-03
申请号：US17091359
申请日：2020-11-06
Inventor： John P. Lesso , Thomas I. Harvey
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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公开(公告)号：US11317227B2
公开(公告)日：2022-04-26
申请号：US17038660
申请日：2020-09-30
Inventor： John P. Lesso
Abstract: Monitoring circuitry, comprising: a current monitoring unit operable to monitor a speaker current flowing through a speaker and generate a monitor signal indicative of that current; and a controller operable, based on a control signal, to control the current monitoring unit to control whether the monitor signal is generated and/or a property of the monitor signal.
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公开(公告)号：US11271532B1
公开(公告)日：2022-03-08
申请号：US16997409
申请日：2020-08-19
Inventor： John P. Lesso
Abstract: This application relates to an amplifier selectively operable in first or second modes. The first mode is a BTL mode with first and second output drivers (103p, 103n) both active to generate respective driving signals that vary with an input signal. The second mode is an SE mode, where the first output driver (103p) is active to generate a driving signal at and the output of the second driver (103n) is held constant. A controller (201) selectively controls the mode based on an indication of output signal amplitude. In the first mode, a ratio of magnitude of the two driving signals varies with the indication of output signal amplitude, i.e. the magnitudes of the two driving signals may vary so as to be not equal.
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公开(公告)号：US20220029532A1
公开(公告)日：2022-01-27
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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Patent Agency Ranking
公开(公告)号：US11031863B2
公开(公告)日：2021-06-08
申请号：US16547063
申请日：2019-08-21
Inventor： John P. Lesso , John L. Pennock , Peter J. Frith
Abstract: A signal amplifying circuit and associated methods and apparatuses, the circuit comprising: a signal path extending from an input terminal to an output terminal, a gain controller arranged to control the gain applied along the signal path in response to a control signal; an output stage within the signal path for generating the output signal, the output stage having a gain that is substantially independent of its supply voltage, and a variable voltage power supply comprising a charge pump for providing positive and negative output voltages, the charge pump comprising a network of switches that is operable in a number of different states and a controller for operating the switches in a sequence of the states so as to generate positive and negative output voltages together spanning a voltage approximately equal to the input voltage.
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公开(公告)号：US20190288698A1
公开(公告)日：2019-09-19
申请号：US16434617
申请日：2019-06-07
Inventor： John P. Lesso
Abstract: A clock generator receives first and second clock signals, and input representing a desired frequency ratio. A comparison is made between frequencies of an output clock signal and the first clock signal, and a first error signal represents the difference between the desired frequency ratio and this comparison result. The first error signal is filtered. A comparison is made between frequencies of the output clock signal and the second clock signal, and a second error signal represents the difference between the filtered first error signal and this comparison result. The second error signal is filtered. A numerically controlled oscillator receives the filtered second error signal and generates an output clock signal. As a result, the output clock signal has the jitter characteristics of the first input clock signal over a useful range of jitter frequencies and the frequency accuracy of the second input clock signal.
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公开(公告)号：US20180269884A1
公开(公告)日：2018-09-20
申请号：US15983378
申请日：2018-05-18
Inventor： John P. Lesso
CPC classification number: H03L7/099 , G06F3/162 , H03G5/00 , H03G5/005 , H03L7/08 , H03L7/087 , H03L7/14 , H03L7/18 , H03L2207/50
Abstract: A clock generator receives first and second clock signals, and input representing a desired frequency ratio. A comparison is made between frequencies of an output clock signal and the first clock signal, and a first error signal represents the difference between the desired frequency ratio and this comparison result. The first error signal is filtered. A comparison is made between frequencies of the output clock signal and the second clock signal, and a second error signal represents the difference between the filtered first error signal and this comparison result. The second error signal is filtered. A numerically controlled oscillator receives the filtered second error signal and generates an output clock signal. As a result, the output clock signal has the jitter characteristics of the first input clock signal over a useful range of jitter frequencies and the frequency accuracy of the second input clock signal.
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公开(公告)号：US09685856B2
公开(公告)日：2017-06-20
申请号：US15205439
申请日：2016-07-08
Inventor： John P. Lesso , Peter J. Frith , John L. Pennock
CPC classification number: H02M3/07 , H02M1/00 , H02M2001/0083 , H02M2001/009 , H03F3/181
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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公开(公告)号：US12223980B2
公开(公告)日：2025-02-11
申请号：US17065219
申请日：2020-10-07
Inventor： Thomas I. Harvey , John P. Lesso
Abstract: A method for diagnosing a condition of a first headset enclosed in a headset enclosure. The method comprises playing a first audio stimulus through a first speaker of the headset; detecting a first response signal derived by a first transducer; and determining a condition of the first speaker and/or first transducer based on the first response signal.
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