-
公开(公告)号：US10094878B1
公开(公告)日：2018-10-09
申请号：US15631907
申请日：2017-06-23
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rajan Lakshmi Narasimha , David Patrick Magee
Abstract: A controller for driving a motor includes a multiphase driver, an analog-to-digital converter (ADC), impedance estimation circuitry, and fault detection circuitry. The multiphase driver is configured to generate drive signals for energizing each motor phase winding. The ADC is configured to digitize voltage and current from each motor phase winding. The impedance estimation circuitry is configured to determine a phasor value for the digitized voltages and for the digitized currents at a predetermined harmonic frequency, and to determine a sequence impedance value based on the phasor values. The fault detection circuitry is configured to identify a fault in the windings of the motor based on the sequence impedance value.
-
42.发明申请公开(公告)号：US20180085793A1
公开(公告)日：2018-03-29
申请号：US15492286
申请日：2017-04-20
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , David Patrick Magee
Abstract: Methods and apparatus for using two stage ultrasonic lens cleaning for water removal are disclosed. An apparatus can expel fluid from a droplet on an optical surface using an ultrasonic transducer mechanically coupled to the optical surface and having first and second resonant frequency bands. A signal generator can generate a first signal including a first frequency to be coupled with the ultrasonic transducer mechanically coupled to the surface, and can generate a second signal including a second frequency to be coupled with the ultrasonic transducer mechanically coupled to the surface. Switching circuitry can activate the ultrasonic transducer at the first frequency to reduce the droplet from a first size to a second size, and to activate the ultrasonic transducer at the second frequency to reduce the droplet from the second size to a third size.
-
公开(公告)号：US20170367657A1
公开(公告)日：2017-12-28
申请号：US15192456
申请日：2016-06-24
Applicant: Texas Instruments Incorporated
Inventor： Tarkesh Pande , David Patrick Magee
Abstract: A photoplethysmogram system includes a plurality of sensors, each sensor capable of providing a sensor signal, and an adaptive filter capable of receiving a first input signal and computing an output. The photoplethysmogram system is capable of operating the filter in sequential stages, such that at each different stage the first input signal is a different sensor signal.
-
公开(公告)号：US20170272011A1
公开(公告)日：2017-09-21
申请号：US15615951
申请日：2017-06-07
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , Anuj Jain , David Patrick Magee
IPC: H02P6/16
CPC classification number: H02P6/16 , G01R33/072 , G01R33/077 , H02K29/08 , H02P21/06 , H02P25/03
Abstract: A motor control system for a permanent magnet synchronous motor (PMSM) uses two linear Hall devices to produce a first signal indicative of a strength of a first magnetic field component produced by a set of rotor magnets and to simultaneously produce a second signal indicative of a strength of second magnetic field component produced by the rotor magnets that is approximately orthogonal to the first magnetic field component. An angular position and angular velocity of the rotor is calculated based on the first signal and the second signal. A plurality of phase signals is produced based on the calculated angular position and angular velocity. Current in a plurality of field windings of the motor is controlled using the plurality of phase signals.
-
公开(公告)号：US20170164847A1
公开(公告)日：2017-06-15
申请号：US14970434
申请日：2015-12-15
Applicant: Texas Instruments Incorporated
Inventor： Tarkesh Pande , David Patrick Magee
CPC classification number: A61B5/02416 , A61B5/0002 , A61B5/721 , A61B5/7246 , A61B5/725 , A61B5/7257
Abstract: A method for heart rate measurement in a photoplethysmograph (PPG) heart rate monitor device is provided that includes performing motion compensation on a PPG signal wherein a motion compensated PPG signal PPGaccX is generated with reference to an X-axis acceleration signal, a motion compensated PPG signal PPGaccY is generated with reference to a Y-axis acceleration signal, and a motion compensated PPG signal PPGaccZ is generated with reference to a Z-axis acceleration signal, combining PPGaccX, PPGaccY, and PPGaccZ to generate a final motion compensated PPG signal, wherein a first weight is applied PPGaccX, a second weight is applied to PPGaccY, and a third weight is applied to PPGaccZ, performing a single Fourier Transform (FT) on the final motion compensated PPG signal to generate a frequency domain PPG signal; and estimating a heart rate based on the frequency domain PPG signal.
-
Patent Agency Ranking
公开(公告)号：US20170163182A1
公开(公告)日：2017-06-08
申请号：US14960164
申请日：2015-12-04
Applicant: Texas Instruments Incorporated
Inventor： Stephen John Fedigan , Anuj Jain , David Patrick Magee
IPC: H02P6/16
Abstract: A motor control system for a permanent magnet synchronous motor (PMSM) uses two linear Hall devices to produce a first signal indicative of a strength of a first magnetic field component produced by a set of rotor magnets and to simultaneously produce a second signal indicative of a strength of second magnetic field component produced by the rotor magnets that is approximately orthogonal to the first magnetic field component. An angular position and angular velocity of the rotor is calculated based on the first signal and the second signal. A plurality of phase signals is produced based on the calculated angular position and angular velocity. Current in a plurality of field windings of the motor is controlled using the plurality of phase signals.
-
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.
-
公开(公告)号：US11768250B2
公开(公告)日：2023-09-26
申请号：US17463186
申请日：2021-08-31
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Charles Kasimer Sestok, IV , David Patrick Magee
IPC: G01R31/389 , G01R31/3835 , G01R31/396
CPC classification number: G01R31/389 , G01R31/3835 , G01R31/396
Abstract: A method includes determining a droop component of a measured parameter of a device under test (DUT). The measured parameter is responsive to an excitation signal having a frequency component, and the droop component is determined responsive to a first value of the parameter at a first time and a second value of the parameter at a second time. The parameter at the first time has a first phase value, and the parameter at the second time has a second phase value. The first phase value is equal to the second phase value. The method also includes correcting a frequency domain representation of the parameter by applying the droop component at a frequency of the representation of the parameter corresponding to the frequency component of the excitation signal.
-
公开(公告)号：US11693235B2
公开(公告)日：2023-07-04
申请号：US17165895
申请日：2021-02-02
Applicant: Texas Instruments Incorporated
CPC classification number: G02B27/0006 , B08B7/028 , G01H13/00 , G01D5/2405
Abstract: An apparatus includes a mass detection circuit coupled to a surface covered with a plurality of electrodes. The mass detection circuit is configured to detect a mass of a first droplet present on the surface. The apparatus further includes a transducer circuit coupled to a transducer, which is coupled to the surface and form a lens unit. The transducer circuit configured to excite a first vibration of the surface at a resonant frequency to form a high displacement region on the surface. The apparatus also includes a voltage excitation circuit coupled to the plurality of electrodes. In response to the detection of the mass of the first droplet, the voltage excitation circuit is configured to apply a sequence of differential voltages on one or more consecutive electrodes which moves the first droplet to the high displacement region.
-
公开(公告)号：US11607704B2
公开(公告)日：2023-03-21
申请号：US15492395
申请日：2017-04-20
Applicant: TEXAS INSTRUMENTS INCORPORATED
Abstract: Methods and apparatus for electrostatic control of expelled material for lens cleaners are disclosed. In certain described examples, an apparatus can expel fluid by atomization from a central area of the surface using an ultrasonic transducer mechanically coupled to the surface. A first electrode can be arranged relative to the central area of the surface. A second electrode can be located in a peripheral area relative to the central area of the surface, in which a voltage can be applied between the first and second electrodes to attract atomized fluid at the peripheral area.
-
-
-
-
-
-
-
-
-
Search Results
134
records
(took 0.023 seconds)
