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公开(公告)号：US20240201282A1
公开(公告)日：2024-06-20
申请号：US18228479
申请日：2023-07-31
Applicant: Texas Instruments Incorporated
Abstract: An example apparatus includes: a first switch having a control terminal; a second switch having a first terminal and a control terminal; detection circuitry having a first terminal and a second terminal the detection circuitry configured to detect a parasitic resistance at the first terminal of the second switch; and controller circuitry having a first terminal and a second terminal, the first terminal of the controller circuitry coupled to the control terminal of the first switch and the control terminal of the second switch, the second terminal of the controller circuitry coupled to second terminal of the detection circuitry, the controller circuitry configured to disable the first switch responsive to the detection of the parasitic resistance.
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公开(公告)号：US20180214084A1
公开(公告)日：2018-08-02
申请号：US15936029
申请日：2018-03-26
Applicant: Texas Instruments Incorporated
CPC classification number: A61B5/6898 , A61B5/053 , A61B5/0535 , A61B5/0537 , A61B5/7221 , A61B2560/0468
Abstract: The disclosure provides a circuit for impedance measurement. The circuit includes an excitation source coupled between a first set of input switches. An impedance network is coupled between the first set of input switches and a first set of output switches. The impedance network includes a body impedance and a plurality of electrode impedances. A sense circuit is coupled to the first set of output switches. The sense circuit measures the body impedance and at least one electrode impedance of the plurality of electrode impedances.
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3.发明申请公开(公告)号：US20220416741A1
公开(公告)日：2022-12-29
申请号：US17362443
申请日：2021-06-29
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Oswal , Raja Reddy Patukuri , Aravind Miriyala , Anand Hariraj Udupa , Hari Babu Tippana , Aatish Chandak
Abstract: An ECG signal acquisition system includes a first amplifier which has a non-inverting input adapted to be coupled to a first differential input, an inverting input adapted to be coupled to a second differential input, and an output. The system includes first and second biasing resistors coupled between the non-inverting and inverting inputs of the first amplifier. The system includes an average estimation circuit which has a first input coupled to the non-inverting input of the first amplifier and a second input coupled to the inverting input of the first amplifier. The system includes a driver amplifier which has an inverting input coupled to the output of the average estimation circuit, a non-inverting input coupled to receive a reference common-mode voltage, and an output. The system includes a low-pass filter coupled between the output of the driver amplifier and the biasing resistors.
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公开(公告)号：US10739433B2
公开(公告)日：2020-08-11
申请号：US15465484
申请日：2017-03-21
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anand Hariraj Udupa , Hussam Ahmed , Jagannathan Venkataraman , Sandeep Kesrimal Oswal , Prabin Krishna Yadav , Anand Reghunathan , Kiran Rajmohan
Abstract: A system may comprise: an excitation current source; a first electrode coupled to the excitation current source; and a second electrode coupled to the excitation current source. The first and second electrodes may be configured to pass an excitation current from the excitation current source through a human body. First and second calibration resistors may be coupled to and positioned between the excitation current source and the first electrode. Third and fourth calibration resistors may be coupled to and positioned between the excitation current source and the second electrode. The system may also comprise a sensor configured to measure voltages across each of the first, second, third, and fourth calibration resistors.
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公开(公告)号：US10362994B2
公开(公告)日：2019-07-30
申请号：US15298764
申请日：2016-10-20
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Hussam Ahmed , Jagannathan Venkataraman , Sandeep Kesrimal Oswal , Antoine Lourdes Praveen Aroul , Hari Babu Tippana , Anand Hariraj Udupa
IPC: A61B5/1455 , A61B5/00 , A61B5/0205 , A61B5/024
Abstract: A bio-sensing device (and method) calibrates a time period used to make bio-physical measurements. The device initiates a light source sense phase followed by a first ambient sense phase and a second ambient sense phase. In the light source sense phase, the device is configured to receive a digital value indicative of current through a photodetector while the light source circuit is enabled and in each of the first and second ambient sense phases, the device is configured to receive digital values while the light source circuit is disabled. The device iteratively varies the time period between the phases until the digital value received during the first ambient sense phase is within a threshold of the digital value received during the second ambient sense phase. It then applies the same time separation between the light source sense phase and the ambient phase thereby equalizing the magnitude of the ambient light in the two phases.
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Patent Agency Ranking
公开(公告)号：US10145736B2
公开(公告)日：2018-12-04
申请号：US15491729
申请日：2017-04-19
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Hussam Ahmed , Jagannathan Venkataraman , Sandeep Kesrimal Oswal , Hari Babu Tippana , Anand Hariraj Udupa
IPC: G01J1/44 , H01L31/101 , H01L31/107
Abstract: At least some embodiments are directed to a light detection system comprising a photodiode, a transimpedance amplifier (TIA) having a differential output and a differential input coupled across the photodiode, a first bias current source coupled to an anode of the photodiode, and a second bias current source coupled to a cathode of the photodiode. The system also comprises a dynamic control logic coupled to the first and second bias current sources and configured to vary bias currents provided by the first and second bias current sources based on the differential output such that the photodiode is reverse-biased.
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7.发明授权公开(公告)号：US08963607B1
公开(公告)日：2015-02-24
申请号：US14468009
申请日：2014-08-25
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Kesrimal Oswal , Eeshan Miglani , H. Mohammed Shuaeb Fazeel , Pradeep Nair , Anand Hariraj Udupa
CPC classification number: H03K5/003
Abstract: DC offset correction is provided with low frequency support. A first input terminal for receiving an input signal is selectively coupled to a resistance and a capacitor that are series coupled between the first input terminal and a corresponding output terminal. In a calibration phase, the series resistance is coupled between the input terminal and the capacitor and an average voltage level of the input is stored on capacitor. In a signal processing phase, the charged capacitor is coupled in series between the input terminal and the output terminal while the resistance is bypassed. The output signal obtained contains the high and low frequency components of the input signal, while the DC offset in the input signal is removed from the output signal. A differential circuit and methods are disclosed. Additional embodiments are disclosed.
Abstract translation: DC偏移校正提供低频支持。 用于接收输入信号的第一输入端选择性地耦合到串联耦合在第一输入端和相应输出端之间的电阻和电容。 在校准阶段，串联电阻耦合在输入端和电容之间，输入的平均电压电平存储在电容上。 在信号处理阶段，当电阻被旁路时，充电的电容器串联在输入端子和输出端子之间。 获得的输出信号包含输入信号的高频和低频分量，输入信号中的直流偏移从输出信号中去除。 公开了一种差分电路和方法。 公开了另外的实施例。
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公开(公告)号：US20240206034A1
公开(公告)日：2024-06-20
申请号：US18228454
申请日：2023-07-31
Applicant: Texas Instruments Incorporated
Inventor： Raja Reddy Patukuri , Anand Hariraj Udupa , Aravind Miriyala , Sandeep Oswal , Rajat Agarwal
IPC: H05B45/347 , H05B45/3725 , H05B45/44
CPC classification number: H05B45/347 , H05B45/3725 , H05B45/44 , A61B5/0059
Abstract: An example apparatus includes: driver circuitry having a first terminal and a second terminal; and voltage control circuitry having a first terminal and a second terminal, the first terminal of the voltage control circuitry coupled to the first terminal of the driver circuitry, the second terminal of the voltage control circuitry coupled to the second terminal of the driver circuitry, the voltage control circuitry configured to supply an LED supply voltage.
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公开(公告)号：US20240057923A1
公开(公告)日：2024-02-22
申请号：US18204143
申请日：2023-05-31
Applicant: Texas Instruments Incorporated
Inventor： Nithin Jose , Anand Hariraj Udupa , Sachin Aithal , Raja Reddy Patukuri , Ashin Antony
CPC classification number: A61B5/347 , A61B5/256 , A61B5/7203
Abstract: Systems, apparatus, articles of manufacture, and methods are disclosed to detect a pace pulse in an electrocardiogram (ECG) signal. An example apparatus includes programmable circuitry configured to execute instructions to: identify a leading edge of a pulse in an input signal based on an amplitude change; identify a transition time of the leading edge of the pulse; validate the leading edge of the pulse based on the amplitude change and transition time; identify a trailing edge of the pulse; determine a width of the pulse between the leading edge and the trailing edge; and validate the pulse based on the width.
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公开(公告)号：US10006950B2
公开(公告)日：2018-06-26
申请号：US14694500
申请日：2015-04-23
Applicant: Texas Instruments Incorporated
Abstract: The disclosure provides a circuit for impedance measurement. The circuit includes an excitation source that generates an excitation signal. A switched resistor network is coupled to the excitation source, and generates an output signal in response to the excitation signal. A sense circuit is coupled to the switched resistor network, and generates a sense signal in response to the output signal. A comparator is coupled to the sense circuit, and generates a clock signal in response to the sense signal. A mixer is coupled to the sense circuit, and multiplies the sense signal and the clock signal to generate a rectified signal. A low pass filter is coupled to the mixer and filters the rectified signal to generate an averaged signal. A processor is coupled to the low pass filter and measures a body impedance from the averaged signal.
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