公开(公告)号：US20250116691A1

公开(公告)日：2025-04-10

申请号：US18481481

申请日：2023-10-05

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John P. LESSO ,  Salvatore CAPORALE

IPC: G01R27/16

Abstract: Circuitry for determining one or more characteristics of an electrochemical cell comprising a first working electrode, a second working electrode and a counter electrode, the circuitry comprising: drive circuitry configured to: apply a first stimulus to the first working electrode; apply a compensation stimulus to one or more of the first working electrode, the second working electrode and the counter electrode; measurement circuitry configured to: measure a first signal at the first working electrode; and measure a second signal at the second working electrode; and processing circuitry configured to: determine the one or more characteristics of the electrochemical cell based on the first signal or the second signal, wherein the compensation stimulus is applied to compensate for cross talk between the first working electrode and the second working electrode.

公开(公告)号：US20240377354A1

公开(公告)日：2024-11-14

申请号：US18611311

申请日：2024-03-20

Applicant: Cirrus Logic International Semiconductor Ltd.

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.

公开(公告)号：US20240305119A1

公开(公告)日：2024-09-12

申请号：US18584608

申请日：2024-02-22

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John P. LESSO ,  Yanto SURYONO ,  Toru IDO ,  Claire MOTION

IPC: H02J7/00 ,  H03H17/00 ,  H03H17/02

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.

公开(公告)号：US20240214735A1

公开(公告)日：2024-06-27

申请号：US18529364

申请日：2023-12-05

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Robert J. HATFIELD ,  Alastair M. BOOMER ,  John P. LESSO ,  Calum J. TAIT

IPC: H04R5/04 ,  H01R24/58 ,  H04R1/10 ,  H04R3/12 ,  H04R29/00

CPC classification number: H04R5/04 ,  H01R24/58 ,  H04R1/1041 ,  H04R3/12 ,  H04R29/002 ,  H04R29/004 ,  H04R2420/03 ,  H04R2420/05 ,  H04R2420/09

Abstract: In an example there is provided circuitry for detecting a type of accessory connected to a first jack plug inserted into a first jack port. The circuitry is configured to determine whether an audio signal is present at the tip or the ring of the first jack plug. If there is an audio signal present at the tip or the ring of the first jack plug, then the circuitry is configured to determine that the type of accessory is a stereo line-in accessory connected to a 3-pole jack plug.

公开(公告)号：US20240125854A1

公开(公告)日：2024-04-18

申请号：US18452100

申请日：2023-08-18

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John P. LESSO ,  Scott P. WARRICK ,  Yanto SURYONO

IPC: G01R31/36 ,  G01R31/367 ,  G01R31/382

CPC classification number: G01R31/3648 ,  G01R31/367 ,  G01R31/382

Abstract: Circuitry for processing a response from an electrochemical cell to a stimulus, the circuitry comprising: sense circuitry configured to measure the response of the electrochemical cell to the stimulus; and processing circuitry configured to: sample the measured response to obtain a plurality of samples; and determine a first average signal based on a first number of samples of the plurality of samples; and output the first average signal, wherein the first number of samples in the first average signal is selected to minimise a first variance in the first number of samples.

公开(公告)号：US20230061184A1

公开(公告)日：2023-03-02

申请号：US17463796

申请日：2021-09-01

Applicant: Cirrus Logic International Semiconductor Ltd.

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.

公开(公告)号：US20220368336A1

公开(公告)日：2022-11-17

申请号：US17869344

申请日：2022-07-20

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John P. LESSO

IPC: H03M1/06

Abstract: This application describes method and apparatus for data conversion. An analogue-to-digital converter circuit receives an analogue input signal (SIN) and outputs a digital output signal (SOUT) The circuit has a sampling capacitor, a controlled oscillator and a counter for generating a count value based on a number of oscillations in an output of the controlled oscillator in a count period during a read-out phase. The digital output signal is based on the count value. The converter circuit is operable in a sampling phase and the read-out phase. In the sampling phase, the sampling capacitor is coupled to an input node for the input signal, e.g. via switch. In the read-out phase, the sampling capacitor is coupled to the controlled oscillator, e.g. via switch, such that capacitor powers the first controlled oscillator and a frequency of oscillation in the output of the first controlled oscillator depends on the voltage of the first capacitor.

公开(公告)号：US20220238121A1

公开(公告)日：2022-07-28

申请号：US17721698

申请日：2022-04-15

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John P. LESSO

IPC: G10L17/22 ,  G10L17/06

Abstract: A speech signal is received by a device comprising first and second transducers, and the first transducer comprises a microphone. A method comprises performing a first voice biometric process on speech contained in a first part of a signal received by the microphone, in order to determine whether the speech is the speech of an enrolled user. A first correlation is determined, between said first part of the signal received by the microphone and a corresponding part of the signal received by the second transducer. A second correlation is determined, between said second part of the signal received by the microphone and the corresponding part of the signal received by the second transducer. It is then determined whether the first correlation and the second correlation satisfy a predetermined condition. If it is determined that the speech contained in the first part of the received signal is the speech of an enrolled user and that the first correlation and the second correlation satisfy the predetermined condition, the received speech signal is authenticated.

公开(公告)号：US20250127432A1

公开(公告)日：2025-04-24

申请号：US18912735

申请日：2024-10-11

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John P. LESSO

IPC: A61B5/145 ,  A61B5/00 ,  A61B5/11

Abstract: A glucose monitoring system comprising: a glucose sensor configured to output a glucose sensor output signal indicative of an estimate of a glucose level of a user of the glucose monitoring system; a movement sensor configured to output a movement sensor output signal indicative of detected movement of the user; and a controller configured to generate an estimate of a current glucose level of the user based on the glucose sensor output signal and the movement sensor output signal.

公开(公告)号：US20250030387A1

公开(公告)日：2025-01-23

申请号：US18224770

申请日：2023-07-21

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John P. LESSO ,  Douglas J.W. MACFARLANE ,  John L. MELANSON

IPC: H03F3/217 ,  H03M1/12 ,  H04R1/00

Abstract: This application relates to methods and apparatus for switching drivers. The switching driver has first and second switches for selectively connecting an output node to first and second switching voltages respectively to generate a first output voltage. A compensator is configured to receive a first monitor signal indicative of a sum of the first and second switching voltages and a second monitor signal indicative of a difference between the first and second switching voltages and to apply compensation to the input signal based on the first and second monitor signals so as to compensate for variations in the first and second switching voltages from defined nominal values of the first and second switching voltages. A modulator controls a duty cycle of the first and second switches based on the input signal after said compensation has been applied.