公开(公告)号：US20240110999A1

公开(公告)日：2024-04-04

申请号：US18326658

申请日：2023-05-31

Applicant: Texas Instruments Incorporated

Inventor： Lei Ding ,  Elie Libbos ,  Srinath Ramaswamy

IPC: G01R33/00 ,  G01R33/09

CPC classification number: G01R33/0035 ,  G01R33/0017 ,  G01R33/09

Abstract: In one example, a calibration method includes receiving, from a sensor proximate a first conductor, a sensor signal representing a measurement of a magnetic field produced based on a first current flowing in the first conductor and a second current flowing in a second conductor, the first current including first and second current components having different frequencies, and the second current including third and fourth current components, the third current component phase shifted from, and having the same frequency as, the first current component and the fourth current component having a different frequency from the third current component, determining reference values of the first and second currents, and based on the sensor signal and the reference values of the first and second currents, determining for the sensor, a plurality of coupling coefficients representing magnetic field coupling between the first and second conductors.

公开(公告)号：US11143751B2

公开(公告)日：2021-10-12

申请号：US16052042

申请日：2018-08-01

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Lei Ding ,  Srinath Mathur Ramaswamy

IPC: G01S7/00 ,  G01S7/527 ,  H03M1/12 ,  H03F3/04 ,  H03G3/30 ,  H03K5/24

Abstract: An ultrasonic sensing system includes: an amplifier including an input and an output; and an n-level comparator, coupled to the output of the amplifier, to compare an adjustable threshold voltage to an output signal from the output of the amplifier. N is greater than or equal to 1. The system also includes a noise power estimator, coupled to an output of the n-level comparator, to generate a noise power signal indicative of noise power of an input signal at the input of the amplifier. The system further includes a time-varying threshold circuit, coupled to the noise power estimator and the n-level comparator, to adjust the adjustable threshold voltage based on the noise power signal.

公开(公告)号：US10809365B2

公开(公告)日：2020-10-20

申请号：US14833916

申请日：2015-08-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sujeet Milind Patole ,  Anand Dabak ,  Lei Ding ,  Murtaza Ali

IPC: G01S13/36 ,  G01S7/35 ,  G01S13/34

Abstract: A frequency modulated continuous wave (FMCW) radar system that includes a transceiver coupled to an analog to digital converter (ADC), and a digital signal processor (DSP) coupled to the ADC. The transceiver is configured to transmit a plurality of FMCW chirps, receive a plurality of reflected FMCW chirps, and mix the plurality of reflected FMCW chirps with at least one of the FMCW chirps to generate a plurality of beat signals. The reflected FMCW chirps are the FMCW chirps after being reflected off of a target object. The ADC is configured to convert the beat signals into a plurality of digital chirps. The DSP is configured to receive the digital chirps and quantify a plurality of vibration parameters for the target object based on a comparison of phase information in a frequency domain between one of the plurality of FMCW chirps and one of the plurality of digital chirps.

公开(公告)号：US10682670B2

公开(公告)日：2020-06-16

申请号：US15675162

申请日：2017-08-11

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Lei Ding ,  Srinath Mathur Ramaswamy ,  Baher Haroun

IPC: B06B1/02 ,  G01S7/524 ,  B05B17/06 ,  G10K11/34 ,  G01S15/10 ,  G01F23/22

Abstract: An ultrasonic detection circuit includes a transmitter circuit that provides excitation signals to an ultrasonic transducer during an excitation interval. A control circuit includes a port to receive a command. The control circuit controls the frequency and the duty cycle of the excitation signals of the transmitter circuit during the excitation interval. The control circuit generates a first excitation signal sequence of the excitation interval followed by a first monitoring period to receive a first echo signal in response to the command. The control circuit generates a second excitation signal sequence of the excitation interval followed by a second monitoring period to receive a second echo signal in response to the command. The control circuit outputs results via the port based on at least one of the first or second echo signals received.

公开(公告)号：US10585177B2

公开(公告)日：2020-03-10

申请号：US15626964

申请日：2017-06-19

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Lei Ding ,  Srinath Mathur Ramaswamy

IPC: G01S7/52 ,  G01S7/524

Abstract: A circuit includes an ultrasonic transducer having a first terminal and a second terminal. The first terminal receives an electrical drive signal and excites the ultrasonic transducer during an excitation interval to provide an ultrasound signal. The first terminal also provides an electrical receive signal in response to the ultrasonic transducer receiving a reflected ultrasound signal. The circuit includes a capacitor having one terminal connected to the first terminal of the ultrasonic transducer. A resistor is connected to another terminal of the capacitor to form a resistor-capacitor (RC) network. At least one of resistor and the capacitor have a variable resistance or capacitance value that is set to tune the RC network to mitigate ringing of the ultrasonic transducer following the excitation interval.

公开(公告)号：US10205617B2

公开(公告)日：2019-02-12

申请号：US13949345

申请日：2013-07-24

Applicant: Texas Instruments Incorporated

Inventor： Lei Ding ,  Rahmi Hezar ,  Zigang Yang

IPC: H04L27/26

Abstract: For crest factor reduction in a first signal having first and second components, the first component is delayed. A second signal is generated in response to detecting that a peak in the first component exceeds a predetermined threshold. Amplitude of the peak in the first component is reduced in response to detecting that the peak in the first component exceeds the predetermined threshold. Reducing amplitude of the peak in the first component includes adding the second signal to the delayed first component.

公开(公告)号：US10116270B2

公开(公告)日：2018-10-30

申请号：US15265257

申请日：2016-09-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Aritra Banerjee ,  Nathan R. Schemm ,  Rahmi Hezar ,  Lei Ding ,  Baher Haroun

IPC: H03F3/191 ,  H03F1/42 ,  H03F1/02 ,  H03F3/19 ,  H03F3/21 ,  B81B7/02 ,  H03F1/22 ,  H03F3/195 ,  H03F3/24 ,  H03F1/56 ,  H03F3/193

Abstract: A circuit includes an amplifier configured to amplify an input signal and generate an output signal. The circuit also includes a tuning network configured to tune frequency response of the amplifier. The tuning network includes at least one tunable capacitor, where the at least one tunable capacitor includes at least one micro-electro mechanical system (MEMS) capacitor. The amplifier could include a first die, the at least one MEMS capacitor could include a second die, and the first die and the second die could be integrated in a single package. The at least one MEMS capacitor could include a MEMS superstructure disposed over a control structure, where the control structure is configured to control the MEMS superstructure and tune the capacitance of the at least one MEMS capacitor.

公开(公告)号：US09784828B2

公开(公告)日：2017-10-10

申请号：US14836521

申请日：2015-08-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sujeet Milind Patole ,  Anand Dabak ,  Lei Ding

IPC: G01S13/58 ,  G01S7/35 ,  G01S13/34

CPC classification number: G01S13/584 ,  G01S7/352 ,  G01S13/343

Abstract: A frequency modulated continuous wave (FMCW) radar system that includes a transceiver coupled to an analog to digital converter (ADC), and a digital signal processor (DSP) coupled to the ADC. The transceiver is configured to transmit a plurality of FMCW chirps, receive a plurality of reflected FMCW chirps, and mix the reflected FMCW chirps with at least one of the FMCW chirps to generate a plurality of beat signals. The reflected FMCW chirps are the FMCW chirps after being reflected off of a target object. The ADC is configured to convert the beat signals into a plurality of digital chirps. The DSP is configured to receive the digital chirps and quantify a relative velocity of the target object as compared to a velocity of the FMCW radar system by removing an effect of a range to the target object from a two dimensional range Doppler processing signal.

公开(公告)号：US09281976B2

公开(公告)日：2016-03-08

申请号：US14172714

申请日：2014-02-04

Applicant: Texas Instruments Incorporated

Inventor： Rahmi Hezar ,  Lei Ding ,  Baher Haroun

IPC: H04L5/00 ,  H04L27/20 ,  H03F3/19 ,  H03F3/24 ,  H03F1/02

CPC classification number: H04L27/3411 ,  H03F1/02 ,  H03F1/0294 ,  H03F3/19 ,  H03F3/2175 ,  H03F3/245 ,  H03F2200/331 ,  H03F2200/336 ,  H03F2200/451 ,  H04B1/02 ,  H04B14/062 ,  H04L27/2053

Abstract: At least one tone is generated. An output signal is generated in response to an input signal and the at least one tone. The output signal is modulated. The input signal and the at least one tone are represented in the modulated output signal. The at least one tone is outside a bandwidth of the input signal as represented in the modulated output signal. The modulated output signal is amplified. The at least one tone in the amplified signal is attenuated after the amplifying.

Abstract translation: 至少产生一个音调。 响应于输入信号和至少一个音调产生输出信号。 输出信号被调制。 在调制输出信号中表示输入信号和至少一个音调。 至少一个音调在调制输出信号所表示的输入信号的带宽之外。 调制输出信号被放大。 放大信号中的至少一个音调在放大后衰减。

公开(公告)号：US20150372645A1

公开(公告)日：2015-12-24

申请号：US14312239

申请日：2014-06-23

Applicant: Texas Instruments Incorporated

Inventor： Aritra Banerjee ,  Joonhoi Hur ,  Baher Haroun ,  Nathan Richard Schemm ,  Rahmi Hezar ,  Lei Ding

IPC: H03F1/02 ,  H03F3/217 ,  H03F3/21 ,  H03F3/193

CPC classification number: H03F1/0205 ,  H03F1/0294 ,  H03F3/193 ,  H03F3/211 ,  H03F3/217 ,  H03F3/2171 ,  H03F3/2173 ,  H03F3/2176 ,  H03F3/45179 ,  H03F2200/391 ,  H03F2200/451 ,  H03F2203/21139 ,  H03F2203/21142

Abstract: An outphasing amplifier includes a first class-E power amplifier (16-1) having an output coupled to a first conductor (31-1) and an input receiving a first RF drive signal (S1(t)). A first reactive element (CA-1) is coupled between the first conductor and a second conductor (30-1). A second reactive element (LA-1) is coupled between the second conductor and a third conductor (32-1). A second class-E power amplifier (17-1) includes an output coupled to a fourth conductor (31-2) and an input coupled to a second RF drive signal (S2(t)), a third reactive element (CA-3) coupled between the second and fourth conductors. Outputs of the first and second power amplifiers are combined by the first, second and third reactive elements to produce an output current in a load (R). An efficiency enhancement circuit (LEEC-1) is coupled between the first and fourth conductors to improve power efficiency at back-off power levels. Power enhancement circuits (20-1,2) are coupled to the first and fourth conductors, respectively.

Abstract translation: 外相放大器包括具有耦合到第一导体（31-1）的输出的第一E类功率放大器（16-1）和接收第一RF驱动信号（S1（t））的输入。 第一电抗元件（CA-1）耦合在第一导体和第二导体（30-1）之间。 第二电抗元件（LA-1）耦合在第二导体和第三导体（32-1）之间。 第二类E功率放大器（17-1）包括耦合到第四导体（31-2）的输出和耦合到第二RF驱动信号（S2（t））的输入，第三反应元件（CA-3 ）耦合在第二和第四导体之间。 第一和第二功率放大器的输出由第一，第二和第三无功元件组合以在负载（R）中产生输出电流。 效率增强电路（LEEC-1）耦合在第一和第四导体之间，以提高退避功率电平的功率效率。 功率增强电路（20-1,2）分别耦合到第一和第四导体。