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    Sensor power management
    11.
    发明授权
    Sensor power management 有权

    公开(公告)号：US10823581B2

    公开(公告)日：2020-11-03

    申请号：US14981894

    申请日：2015-12-28

    Applicant: Texas Instruments Incorporated

    Inventor： Sriram Narayanan ,  David Louis Freeman ,  Marco Corsi

    IPC: G01D3/10 ,  G01D18/00

    Abstract: A sensor power management arrangement includes a signal processing circuit configured to receive signal from a sensor, to test the signal against at least one criterion, and to pass the signal for further processing in response to the signal passing the at least one criterion. In this way, only signals that are of a sufficient importance or significance will consume the maximum amount of processing energy and through processing by later processes or circuitry. Should a signal from a sensor not be strong enough or meet other criteria, power will not be wasted in preparing that signal for provision to the microcontroller or microprocessor. Additional flexibility in the sensor power management can be realized by adjusting the criteria against which the sensor signal is compared based on a status of the sensor apparatus.

    Transmitter architecture for photoplethysmography systems
    12.
    发明授权
    Transmitter architecture for photoplethysmography systems 有权

    公开(公告)号：US10187940B2

    公开(公告)日：2019-01-22

    申请号：US15131831

    申请日：2016-04-18

    Applicant: Texas Instruments Incorporated

    Inventor： Arup Polley ,  Ajit Sharma ,  Srinath Ramaswamy ,  Sriram Narayanan

    IPC: H05B33/08 ,  A61B5/024 ,  A61B5/1455 ,  A61B5/00

    Abstract: An LED (light-emitting diode) driver for a photoplethysmography system, including a switched-mode operational amplifier for driving a driver transistor with a source-drain path in series with the LED. In a first clock phase in which the LED is disconnected from the driver transistor, the amplifier is coupled in unity gain mode, and a sampling capacitor stores a voltage corresponding to the offset and flicker noise of the amplifier; the gate of the driver transistor is precharged to a reference voltage in this first clock phase. In a second clock phase, the sampled voltage at the capacitor is subtracted from the reference voltage applied to the amplifier input, so that the LED drive is adjusted according to the sampled noise. A signal from the transmitter channel is forwarded to a noise/ripple remover in the receiving channel, to remove transmitter noise from the received signal.

    Network node physical/communication pins, state machines, interpreter and executor circuitry
    15.
    发明授权
    Network node physical/communication pins, state machines, interpreter and executor circuitry 有权

    公开(公告)号：US09742847B2

    公开(公告)日：2017-08-22

    申请号：US14015849

    申请日：2013-08-30

    Applicant: Texas Instruments Incorporated

    Inventor： Leonardo William Estevez ,  Sriram Narayanan

    IPC: G06F15/173 ,  H04L29/08

    CPC classification number: H04L67/12 ,  H04L67/34

    Abstract: A network of sensor and controller nodes having the ability to be dynamically programmed and receive updated software from one another, and from a host system. Each network node includes multiple state machines, at least some of which are operable relative to physical pins at the network node; the physical pins correspond to inputs from sensor functions or outputs to control functions. The network nodes include microcontrollers that are operable in an operating mode to execute a state machine and respond to commands from other nodes or the host, and in a read mode to receive and store program instructions transmitted from other nodes or the host. A learn mode is also provided, by way of which a network node can store program code corresponding to instructions and actions at the node when under user control.

    Baseline compensation system
    16.
    发明授权
    Baseline compensation system 有权

    公开(公告)号：US09742420B2

    公开(公告)日：2017-08-22

    申请号：US14954577

    申请日：2015-11-30

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Sriram Narayanan ,  Srinath Ramaswamy ,  Arup Polley ,  Ajit Sharma

    IPC: H03M1/00 ,  H03M1/06

    CPC classification number: H03M1/0609 ,  H03M1/001 ,  H03M1/002 ,  H03M1/1295 ,  H03M1/162

    Abstract: An analog to digital converter (ADC) system that includes a first amplifier configured to amplify an analog input signal to produce an amplified direct current (DC) signal, an ADC configured to receive the amplified DC signal and convert the amplified DC signal into a digital DC signal, a digital to analog converter configured to receive the digital DC signal and convert the digital DC signal into an analog DC signal, and a second amplifier configured to receive an analog alternating current (AC) signal comprising the analog DC signal subtracted from the analog input signal and amplify the analog AC signal to produce an amplified AC signal. The ADC is further configured to receive the amplified AC signal and produce a digital AC signal. The second amplifier has a gain greater than a gain of the first amplifier.

    Exploiting constructive interference from ambient conditions
    18.
    发明授权
    Exploiting constructive interference from ambient conditions 有权

    公开(公告)号：US09615427B1

    公开(公告)日：2017-04-04

    申请号：US14954618

    申请日：2015-11-30

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Sriram Narayanan ,  Srinath Ramaswamy ,  Arup Polley ,  Ajit Sharma

    IPC: H05B37/02 ,  A61B5/00 ,  H05B33/08 ,  A61B5/024 ,  A61B5/1455

    CPC classification number: H05B37/0218 ,  A61B5/02416 ,  A61B5/14551 ,  A61B5/7203 ,  H05B33/0854 ,  H05B37/0281 ,  Y02B20/46

    Abstract: An optical system includes an optical illumination source, an optical receiver, a correlation determination circuit, and an ambient condition control circuit. The optical illumination source is configured to emit a light in the direction of a target object. The optical receiver is configured to receive a combined optical signal that includes an ambient light component combined with an interrogation component. The correlation determination circuit is configured to compare the combined optical signal with an ambient light signal to identify a correlation factor. The ambient condition control circuit is configured to compare the correlation factor to a low correlation threshold value and a high correlation threshold value, and, based on the correlation factor exceeding the low threshold value and being less than the high correlation threshold value, cancel the ambient light component from the combined optical signal to produce an interrogation signal including the interrogation component.

    Dynamic Programming and Control of Networked Sensors and Microcontrollers
    19.
    发明申请
    Dynamic Programming and Control of Networked Sensors and Microcontrollers 有权
    网络传感器和微控制器的动态编程与控制

    公开(公告)号：US20150067119A1

    公开(公告)日：2015-03-05

    申请号：US14015849

    申请日：2013-08-30

    Applicant: Texas Instruments Incorporated

    Inventor： Leonardo William Estevez ,  Sriram Narayanan

    IPC: H04L29/08

    CPC classification number: H04L67/12 ,  H04L67/34

    Abstract: A network of sensor and controller nodes having the ability to be dynamically programmed and receive updated software from one another, and from a host system. Each network node includes multiple state machines, at least some of which are operable relative to physical pins at the network node; the physical pins correspond to inputs from sensor functions or outputs to control functions. The network nodes include microcontrollers that are operable in an operating mode to execute a state machine and respond to commands from other nodes or the host, and in a read mode to receive and store program instructions transmitted from other nodes or the host. A learn mode is also provided, by way of which a network node can store program code corresponding to instructions and actions at the node when under user control.

    Abstract translation: 传感器和控制器节点的网络具有能够被动态编程的能力，并且从主机系统接收更新的软件。 每个网络节点包括多个状态机，其中至少一些可相对于网络节点处的物理引脚操作; 物理引脚对应于传感器功能或输出到控制功能的输入。 网络节点包括可在操作模式下操作以执行状态机并响应来自其他节点或主机的命令的微控制器，并且在读取模式下接收和存储从其他节点或主机发送的程序指令。 还提供了学习模式，通过该方式，当用户控制时，网络节点可以存储对应于节点处的指令和动作的程序代码。

    METHOD AND SYSTEM FOR AUTOMATICALLY COUNTING PHYSICAL OBJECTS
    20.
    发明申请
    METHOD AND SYSTEM FOR AUTOMATICALLY COUNTING PHYSICAL OBJECTS 有权
    自动计算物理对象的方法和系统

    公开(公告)号：US20140241581A1

    公开(公告)日：2014-08-28

    申请号：US14189151

    申请日：2014-02-25

    Applicant: Texas Instruments Incorporated

    Inventor： Sriram Narayanan ,  Russell Rosenquist ,  Srinath Ramaswamy

    IPC: G06K9/46 ,  G06T7/00 ,  G06T7/20

    CPC classification number: G06T7/20 ,  G06K9/00771 ,  G06T7/73 ,  G06T2207/10048 ,  G06T2207/30242 ,  G08B13/18

    Abstract: A periphery band is around an excluded region. For automatically counting physical objects within the periphery band and the excluded region, an imaging sensor captures: a first image of the periphery band and the excluded region; and a second image of the periphery band and the excluded region. In response to the first image, a first number is counted of physical objects within the periphery band and the excluded region. Relevant motion is automatically detected within the periphery band, while ignoring motion within the excluded region. In response to the second image, a second number is counted of physical objects within the periphery band and the excluded region. In response to determining that a discrepancy exists between the detected relevant motion and the second number, the discrepancy is handled.

    Abstract translation: 周边乐队在排除地区周围。 为了自动计算外围频带和排除区域内的物体，成像传感器捕获周边频带和排除区域的第一图像; 以及周边频带和排除区域的第二图像。 响应于第一图像，对周边带和排除区域内的物理对象进行计数。 相邻运动在周边波段内自动检测，同时忽略排除区域内的运动。 响应于第二图像，第二个数是对外围频带和被排除区域内的物理对象进行计数。 响应于确定检测到的相关运动与第二数目之间存在差异，处理差异。

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