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公开(公告)号：US20180351515A1
公开(公告)日：2018-12-06
申请号：US15988823
申请日：2018-05-24
Inventor： John Paul LESSO , Toru IDO
CPC classification number: H03F1/3264 , H03F1/0205 , H03F1/3247 , H03F1/3258 , H03F3/187 , H03F3/217 , H03F2200/03 , H03F2200/102 , H03F2200/129 , H03F2200/171 , H03F2200/267 , H03F2201/3215 , H04R1/1025 , H04R3/04 , H04R2460/03
Abstract: This application relates to methods and apparatus for amplification of audio signals with improved audio performance. An audio driving circuit (200) has an amplifier module (102) in a forward signal path between an input (103) for receiving an input audio signal (SIN) and an output for outputting an audio driving signal (VOUT). A pre-distortion module (202) is operable to apply a first transfer function to the signal in the forward signal path upstream of the amplifier module, wherein the first transfer function comprises a non-linear distortion function based on at least one distortion setting. An error block (203) is arranged to receive a first signal (SFF) derived from the input signal and a second signal (SFB) indicative of the voltage of the audio driving signal and determine a first error signal (ε1) indicative of a difference between the first and second signals. The pre-distortion module (202) is operable to control the distortion setting(s) based on the first error signal.
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公开(公告)号：US20240377354A1
公开(公告)日：2024-11-14
申请号：US18611311
申请日：2024-03-20
Inventor： John P. LESSO , Toru IDO
IPC: G01N27/416 , G01N27/403
Abstract: Circuitry for measuring a characteristic of a sensor having a reactive impedance, the circuitry comprising: a first integrator having a first integrator input, a first integrator output, and an integrating element coupled between the first integrator input and the first integrator output, the integrating element comprising the sensor; And processing circuitry configured to: determine a state of the sensor based on an output signal derived from the first integrator output.
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公开(公告)号：US20240305119A1
公开(公告)日：2024-09-12
申请号：US18584608
申请日：2024-02-22
Inventor： John P. LESSO , Yanto SURYONO , Toru IDO , Claire MOTION
CPC classification number: H02J7/0048 , H02J7/005 , H03H17/0289 , H03H2017/009
Abstract: Circuitry for processing an output of an electrochemical cell comprising a first electrode and a second electrode, the circuitry comprising: drive circuitry configured to apply a stimulus to the first electrode; measurement circuitry configured to obtain an output signal from the output of the electrochemical cell in response to the stimulus; processing circuitry configured to: apply the stimulus to a model of the electrochemical cell; obtain a modelled output signal from the model in response to the stimulus; determine an error in the output signal based on the output signal and the modelled output signal.
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公开(公告)号：US20230387705A1
公开(公告)日：2023-11-30
申请号：US17824687
申请日：2022-05-25
Inventor： John Paul LESSO , Toru IDO , Claire MOTION
IPC: H02J7/00 , G01N27/403 , H02J7/34 , G01R31/385
CPC classification number: H02J7/0048 , G01N27/403 , H02J7/007 , H02J7/34 , G01R31/385
Abstract: Apparatus for delivering power from a battery node of a battery to an output node, the output node coupled to an analyte monitoring device, the apparatus comprising: a slow charging path between the battery node and the output node; a fast charging path parallel to the slow charging path, the fast charging path switchably coupled between the battery node and the output node; and control circuitry configured to: selectively couple the fast charging path between the battery node and the output node to allow faster transfer of charge between the battery node and the output node than the slow charging path.
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公开(公告)号：US20230290335A1
公开(公告)日：2023-09-14
申请号：US18318269
申请日：2023-05-16
Inventor： John Paul LESSO , Toru IDO
CPC classification number: G10L15/06 , G10L19/26 , G10L25/78 , G10L2025/937
Abstract: A method of detecting live speech comprises: receiving a signal containing speech; obtaining a first component of the received signal in a first frequency band, wherein the first frequency band includes audio frequencies; and obtaining a second component of the received signal in a second frequency band higher than the first frequency band. Then, modulation of the first component of the received signal is detected; modulation of the second component of the received signal is detected; and the modulation of the first component of the received signal and the modulation of the second component of the received signal are compared. It may then be determined that the speech may not be live speech, if the modulation of the first component of the received signal differs from the modulation of the second component of the received signal.
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Patent Agency Ranking
公开(公告)号：US20230061184A1
公开(公告)日：2023-03-02
申请号：US17463796
申请日：2021-09-01
Inventor： John P. LESSO , Toru IDO
IPC: G01N27/416 , G01N27/30
Abstract: Circuitry for measuring a characteristic of an electrochemical cell, the circuitry comprising: a comparator having a first comparator input, a second comparator input and a comparator output; a feedback path between the comparator output and the second comparator input configured to provide a feedback signal to the second comparator input; and a loop filter configured to apply filtering to the feedback path to generate the feedback signal, wherein the loop filter comprises the electrochemical cell.
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公开(公告)号：US20220001421A1
公开(公告)日：2022-01-06
申请号：US16921369
申请日：2020-07-06
Inventor： John Paul LESSO , Toru IDO
IPC: B06B1/02
Abstract: The present disclosure relates to driver circuitry for driving a piezoelectric transducer. The circuitry comprises: a power supply; a reservoir capacitance; switch network circuitry; and control circuitry. The control circuitry is configured to control operation of the switch network circuitry so as to charge the reservoir capacitance from the power supply and to transfer charge between the reservoir capacitance and the piezoelectric transducer.
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公开(公告)号：US20200153397A1
公开(公告)日：2020-05-14
申请号：US16740800
申请日：2020-01-13
Inventor： John Paul LESSO , Toru IDO
Abstract: The present disclosure relates to Class D amplifier circuitry comprising: an input for receiving an input signal; first and second output nodes for driving a load connected between the first and second output nodes. A first driver stage is provided for switching the first node between a first supply rail and a second supply rail, and a second driver stage is provided for switching the second node between the first supply rail and the second supply rail. The Class D amplifier circuitry also includes first driver control circuitry configured to receive a first carrier wave and control the switching of the first driver stage based in part on the first carrier wave; second driver control circuitry configured to receive a second carrier wave and control the switching of the second driver stage based in part on the second carrier wave; and a carrier wave generator configured to provide the first carrier wave and the second carrier wave. A phase shift between the first carrier wave and the second carrier wave is adjustable responsive to a mode control signal.
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公开(公告)号：US20190386626A1
公开(公告)日：2019-12-19
申请号：US16552843
申请日：2019-08-27
Inventor： John Paul LESSO , Toru IDO
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：US20240175844A1
公开(公告)日：2024-05-30
申请号：US18506525
申请日：2023-11-10
Inventor： John P. LESSO , Toru IDO
IPC: G01N27/416
CPC classification number: G01N27/4163
Abstract: Circuitry for characterising an electrochemical cell having a first electrode, a second electrode and a non-linear response characteristic, the circuitry comprising: difference circuitry configured to measure a potential difference across the electrochemical cell and output a difference voltage proportional to the measured potential difference; compensation circuitry configured to linearise the difference voltage and output a linearised difference signal; and a first analog-to-digital converter (ADC) configured to convert the linearised difference signal to a digital output.
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