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公开(公告)号：US20170143218A1
公开(公告)日：2017-05-25
申请号：US15237941
申请日：2016-08-16
Applicant: Texas Instruments Incorporated
Inventor： Tarkesh Pande , David Patrick Magee , Rajan Narasimha
CPC classification number: A61B5/02427 , A61B5/7225 , A61B5/7275 , A61B5/7278
Abstract: Disclosed examples include heart rate monitor systems and methods to estimate a patient heart rate or rate of another pulsed signal, in which rate hypotheses or states, are identified for a current time window according to digital sample values of the pulsed signal for a current sample time window, and a rate change value is computed for potential rate transitions between states of the current and previous time windows. Transition pair branch metric values are computed as a function of the rate change value and a frequency domain amplitude of the corresponding rate hypothesis for the current time window, and the pulsed signal rate estimate is determined according to a maximum path metric computed according to the branch metric value and a corresponding path metric value for the previous time window.
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公开(公告)号：US11129538B2
公开(公告)日：2021-09-28
申请号：US16442845
申请日：2019-06-17
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Tarkesh Pande , David Patrick Magee , Rajan Narasimha
Abstract: Disclosed examples include heart rate monitor systems and methods to estimate a patient heart rate or rate of another pulsed signal, in which rate hypotheses or states, are identified for a current time window according to digital sample values of the pulsed signal for a current sample time window, and a rate change value is computed for potential rate transitions between states of the current and previous time windows. Transition pair branch metric values are computed as a function of the rate change value and a frequency domain amplitude of the corresponding rate hypothesis for the current time window, and the pulsed signal rate estimate is determined according to a maximum path metric computed according to the branch metric value and a corresponding path metric value for the previous time window.
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公开(公告)号：US20210378535A1
公开(公告)日：2021-12-09
申请号：US17412580
申请日：2021-08-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Tarkesh Pande , David Patrick Magee , Rajan Narasimha
Abstract: Disclosed examples include heart rate monitor systems and methods to estimate a patient heart rate or rate of another pulsed signal, in which rate hypotheses or states, are identified for a current time window according to digital sample values of the pulsed signal for a current sample time window, and a rate change value is computed for potential rate transitions between states of the current and previous time windows. Transition pair branch metric values are computed as a function of the rate change value and a frequency domain amplitude of the corresponding rate hypothesis for the current time window, and the pulsed signal rate estimate is determined according to a maximum path metric computed according to the branch metric value and a corresponding path metric value for the previous time window.
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Patent Agency Ranking
公开(公告)号：US10694289B2
公开(公告)日：2020-06-23
申请号：US15584532
申请日：2017-05-02
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rahmi Hezar , Rajan Narasimha , Srinath Ramaswamy
Abstract: One example includes a system that is comprised of a speaker, an amplifier, a current sensor, and a compensator circuit. The speaker produces audio in response to an amplified analog input signal received at a speaker input. The amplifier receives an analog audio input signal and provides the amplified analog audio input signal to the speaker input. The current sensor senses current passing through the speaker and provides a current sensor signal indicative thereof. The compensator circuit applies a transfer function to the current sensor signal to provide a compensation signal as feedback into the analog audio input signal, the transfer function matching at least one of resistance and inductance of the speaker.
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公开(公告)号：US20190298198A1
公开(公告)日：2019-10-03
申请号：US16442845
申请日：2019-06-17
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Tarkesh Pande , David Patrick Magee , Rajan Narasimha
Abstract: Disclosed examples include heart rate monitor systems and methods to estimate a patient heart rate or rate of another pulsed signal, in which rate hypotheses or states, are identified for a current time window according to digital sample values of the pulsed signal for a current sample time window, and a rate change value is computed for potential rate transitions between states of the current and previous time windows. Transition pair branch metric values are computed as a function of the rate change value and a frequency domain amplitude of the corresponding rate hypothesis for the current time window, and the pulsed signal rate estimate is determined according to a maximum path metric computed according to the branch metric value and a corresponding path metric value for the previous time window.
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公开(公告)号：US12042257B2
公开(公告)日：2024-07-23
申请号：US17412580
申请日：2021-08-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Tarkesh Pande , David Patrick Magee , Rajan Narasimha
CPC classification number: A61B5/02427 , A61B5/02416 , A61B5/7225 , A61B5/7278 , A61B5/7275
Abstract: Disclosed examples include heart rate monitor systems and methods to estimate a patient heart rate or rate of another pulsed signal, in which rate hypotheses or states, are identified for a current time window according to digital sample values of the pulsed signal for a current sample time window, and a rate change value is computed for potential rate transitions between states of the current and previous time windows. Transition pair branch metric values are computed as a function of the rate change value and a frequency domain amplitude of the corresponding rate hypothesis for the current time window, and the pulsed signal rate estimate is determined according to a maximum path metric computed according to the branch metric value and a corresponding path metric value for the previous time window.
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公开(公告)号：US11140478B2
公开(公告)日：2021-10-05
申请号：US15930957
申请日：2020-05-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rahmi Hezar , Rajan Narasimha , Srinath Ramaswamy
Abstract: A system for driving an audio speaker that has an impedance, the system comprising: a scaler having an analog input and a scaler output that is an attenuated analog input; an amplifier having an amplifier input coupled to the scaler output and an amplifier output; a current sensor having a sensor input coupled to the speaker and a sensor output, the current sensor configured to generate a sensor signal at the sensor output responsive to a current from the audio speaker; and a compensator circuit having a circuit input coupled to the sensor output and a circuit output coupled to the amplifier input, the compensator circuit configured to supply a compensation signal to the amplifier input by applying a transfer function to the sensor signal.
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公开(公告)号：US10321831B2
公开(公告)日：2019-06-18
申请号：US15237941
申请日：2016-08-16
Applicant: Texas Instruments Incorporated
Inventor： Tarkesh Pande , David Patrick Magee , Rajan Narasimha
Abstract: Disclosed examples include heart rate monitor systems and methods to estimate a patient heart rate or rate of another pulsed signal, in which rate hypotheses or states, are identified for a current time window according to digital sample values of the pulsed signal for a current sample time window, and a rate change value is computed for potential rate transitions between states of the current and previous time windows. Transition pair branch metric values are computed as a function of the rate change value and a frequency domain amplitude of the corresponding rate hypothesis for the current time window, and the pulsed signal rate estimate is determined according to a maximum path metric computed according to the branch metric value and a corresponding path metric value for the previous time window.
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