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公开(公告)号：US20230073537A1
公开(公告)日：2023-03-09
申请号：US17691987
申请日：2022-03-10
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Patrick MAGEE , Hailong CHEN , James Kelly GRIFFIN
Abstract: In an example, a system includes an ultrasonic transducer and a bracket coupled to the ultrasonic transducer. The system also includes a lens coupled to the bracket. The system includes a control circuit coupled to the ultrasonic transducer and configured to excite the ultrasonic transducer with a signal to clean the lens.
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公开(公告)号：US20220080458A1
公开(公告)日：2022-03-17
申请号：US17475886
申请日：2021-09-15
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Supriyo PALIT , James Kelly GRIFFIN , David Patrick MAGEE
Abstract: In an example, a method includes providing a pulse-width modulation (PWM) excitation signal to a piezo transducer via a transmit path. The method also includes collecting a block of samples of a current and a voltage at the piezo transducer, where the block of samples is collected in sub-blocks of samples between interrupts in a receive path. The method includes processing each sub-block of samples separately from other sub-blocks of samples. The method also includes, responsive to the sub-blocks of the block of samples being processed, analyzing the block of samples. The method includes, responsive to the analysis, modifying the PWM excitation signal.
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公开(公告)号：US20220260642A1
公开(公告)日：2022-08-18
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 , G01R31/396 , G01R31/3835
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.
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公开(公告)号：US20210201936A1
公开(公告)日：2021-07-01
申请号：US16730546
申请日：2019-12-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
Abstract: A method includes selecting a frame of an audio signal. The method further includes determining a first power spectral density (PSD) distribution of the frame. The method further includes generating a first reference PSD distribution indicating an estimate of background noise in the frame based on a non-linear weight, a second reference PSD distribution of a previous frame of the audio signal, and a second PSD distribution of the previous frame. The method further includes determining whether voice activity is detected in the frame based on the first PSD distribution of the frame and the first reference PSD distribution.
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公开(公告)号：US20190041462A1
公开(公告)日：2019-02-07
申请号：US16154451
申请日：2018-10-08
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rajan Lakshmi NARASIMHA , David Patrick MAGEE
CPC classification number: G01R31/346 , G01R31/343 , H02K11/20
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.
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Patent Agency Ranking
公开(公告)号：US20210201937A1
公开(公告)日：2021-07-01
申请号：US16895827
申请日：2020-06-08
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Charles Kasimer SESTOK, IV , David Patrick MAGEE , Tarkesh PANDE
IPC: G10L25/84
Abstract: Techniques for target input detection, including receiving input data, dividing the input data into data blocks, determining a detection feature value for a first data block, determining a detection threshold based on a set of detection feature statistics determined for a background sampling time period, and determining a target signal has been received based on a comparison between the detection feature value for the first data block to the detection threshold.
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公开(公告)号：US20200021214A1
公开(公告)日：2020-01-16
申请号：US16457064
申请日：2019-06-28
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rajan LAKSHMI NARASIMHA , David Patrick MAGEE
Abstract: A motor controller includes current measurement circuitry and estimation circuitry. The current measurement circuitry is adapted to be coupled to a motor, and configured to measure current in the motor. The estimation circuitry is coupled to the current measurement circuitry, and includes a memory, current computation circuitry, and summation circuitry. The memory stores coefficients of a function for estimating current related to variation of inductance of the motor. The current computation circuitry is coupled to the memory, and is configured to compute a compensation current value based on the coefficients. The summation circuitry is coupled to the current compensation circuitry, and is configured to generate a position error signal by subtracting the compensation current value from a measured current value generated by the current measurement circuitry.
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公开(公告)号：US20190043478A1
公开(公告)日：2019-02-07
申请号：US16051607
申请日：2018-08-01
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Tarkesh PANDE , Lorin Paul NETSCH , David Patrick MAGEE
Abstract: An example method includes: receiving a test phrase; comparing feature vectors of the test phrase to contents of a first database to generate a first score; comparing the feature vectors of the test phrase to contents of a second database to generate a second score; comparing feature vectors of the contents of the second database to the contents of the first database to generate a third score; comparing the feature vectors of the contents of the second database to a model of the test phrase to generate a fourth score; determining a first difference score based on a difference between the first and second scores; determining a second difference score based on a difference between the third and fourth scores; and generating a difference confidence score based on a lesser of the first and second difference scores.
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公开(公告)号：US20180326462A1
公开(公告)日：2018-11-15
申请号：US15591311
申请日：2017-05-10
Applicant: TEXAS INSTRUMENTS INCORPORATED
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.
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公开(公告)号：US20240310440A1
公开(公告)日：2024-09-19
申请号：US18676787
申请日：2024-05-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Charles Kasimer SESTOK, IV , David Patrick MAGEE
IPC: G01R31/319 , G01R31/3167 , H03M1/06 , H03M1/10
CPC classification number: G01R31/31922 , G01R31/3167 , G01R31/31924 , H03M1/0629 , H03M1/1071
Abstract: A circuit comprises a driver circuit, a processing circuit, and a control circuit. The driver circuit has a first frequency control input and a driver output. The processing circuit has a sense input, a second frequency control input, and a parameter output. And the control circuit has a first frequency control output and a second frequency control output, the first frequency control output coupled to the first frequency control input, and the second frequency control output coupled to the second frequency control input.
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