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公开(公告)号：US11644555B2
公开(公告)日：2023-05-09
申请号：US16364691
申请日：2019-03-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Lei Ding , Srinath Mathur Ramaswamy , Vaibhav Garg , Anand Gopalan
CPC classification number: G01S7/536 , G01S15/325
Abstract: In an ultrasonic detection system that uses frequency-modulation coding to distinguish emitted bursts from multiple transducers, a receiver associated with a transducer uses dynamic thresholding to discriminate valid echoes from system and environmental noise in multiple envelope signals produced by multiple correlators. The time-varying dynamic thresholds are generated from the mean of noise in a respective envelope derived from the output of a respective correlator. Multiple thresholds can be combined together such that a single time-varying threshold is applied to all correlators' envelopes. Such thresholding has the benefits of a constant false-alarm rate with regard to detection of echoes (as opposed to false triggering from noise), and, owing to finer-resolution and adaptive thresholds, can detect targets or obstacles as further distances and with greater time responsiveness.
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32.发明授权公开(公告)号：US11175402B2
公开(公告)日：2021-11-16
申请号：US16694506
申请日：2019-11-25
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Lei Ding , Srinath Mathur Ramaswamy , Anand Gopalan
Abstract: Ultrasonic ranging systems and methods that emit coded bursts and correlate transduced acoustical echoes of the bursts with a receive template characterizing a burst code to determine time-of-flight information use receive templates of time-variable length to improve short-range object detection. The template length is based on a time index measured from the start of the burst emission. The detection can account for a dead zone of transducer ringing following a burst. A time-variable gain that is also based on the time index can be applied to the correlated signal. The length and gain can be adjusted with reduced temporal frequency to reduce computation cost.
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33.发明授权公开(公告)号：US10250192B2
公开(公告)日：2019-04-02
申请号：US15708168
申请日：2017-09-19
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Aritra Banerjee , Joonhoi Hur , Baher Haroun , Nathan Richard Schemm , Rahmi Hezar , Lei Ding
Abstract: An outphasing amplifier includes a first class-E power amplifier having an output coupled to a first conductor and an input receiving a first RF drive signal. A first reactive element is coupled between the first conductor and a second conductor. A second reactive element is coupled between the second conductor and a third conductor. A second class-E power amplifier includes an output coupled to a fourth conductor and an input coupled to a second RF drive signal, a third reactive element 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. An efficiency enhancement circuit is coupled between the first and fourth conductors to improve power efficiency at back-off power levels. Power enhancement circuits are coupled to the first and fourth conductors, respectively.
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34.发明授权公开(公告)号：US09806673B2
公开(公告)日：2017-10-31
申请号：US15165339
申请日：2016-05-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Aritra Banerjee , Joonhoi Hur , Baher Haroun , Nathan Richard Schemm , Rahmi Hezar , Lei Ding
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.
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公开(公告)号：US09602325B2
公开(公告)日：2017-03-21
申请号：US15063146
申请日：2016-03-07
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rahmi Hezar , Lei Ding , Baher Haroun
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.
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Patent Agency Ranking
公开(公告)号：US20170005628A1
公开(公告)日：2017-01-05
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
CPC classification number: H03F1/42 , B81B7/02 , B81B2207/99 , H01G5/16 , H01G5/38 , H01G5/40 , H01L23/66 , H01L2223/6655 , H03F1/0205 , H03F1/0294 , H03F1/223 , H03F1/565 , H03F3/19 , H03F3/193 , H03F3/195 , H03F3/21 , H03F3/211 , H03F3/245 , H03F2200/111 , H03F2200/378 , H03F2200/391 , H03F2200/451 , H03F2200/537 , H03F2200/541 , H03F2200/546 , H03F2203/21157
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.
Abstract translation: 电路包括被配置为放大输入信号并产生输出信号的放大器。 电路还包括配置成调节放大器的频率响应的调谐网络。 调谐网络包括至少一个可调谐电容器，其中至少一个可调电容器包括至少一个微机电系统（MEMS）电容器。 放大器可以包括第一管芯，所述至少一个MEMS电容器可以包括第二管芯，并且第一管芯和第二管芯可以集成在单个封装中。 所述至少一个MEMS电容器可以包括设置在控制结构上的MEMS超结构，其中所述控制结构被配置为控制所述MEMS超结构并调谐所述至少一个MEMS电容器的电容。
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公开(公告)号：US09473078B2
公开(公告)日：2016-10-18
申请号：US14452365
申请日：2014-08-05
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
CPC classification number: H03F1/42 , B81B7/02 , B81B2207/99 , H01G5/16 , H01G5/38 , H01G5/40 , H01L23/66 , H01L2223/6655 , H03F1/0205 , H03F1/0294 , H03F1/223 , H03F1/565 , H03F3/19 , H03F3/193 , H03F3/195 , H03F3/21 , H03F3/211 , H03F3/245 , H03F2200/111 , H03F2200/378 , H03F2200/391 , H03F2200/451 , H03F2200/537 , H03F2200/541 , H03F2200/546 , H03F2203/21157
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.
Abstract translation: 电路包括被配置为放大输入信号并产生输出信号的放大器。 电路还包括配置成调节放大器的频率响应的调谐网络。 调谐网络包括至少一个可调谐电容器，其中至少一个可调电容器包括至少一个微机电系统（MEMS）电容器。 放大器可以包括第一管芯，所述至少一个MEMS电容器可以包括第二管芯，并且第一管芯和第二管芯可以集成在单个封装中。 所述至少一个MEMS电容器可以包括设置在控制结构上的MEMS超结构，其中所述控制结构被配置为控制所述MEMS超结构并调谐所述至少一个MEMS电容器的电容。
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公开(公告)号：US11971476B2
公开(公告)日：2024-04-30
申请号：US17364011
申请日：2021-06-30
Applicant: Texas Instruments Incorporated
Inventor： Lei Ding , Srinath Mathur Ramaswamy , Brian Burk , Baher Haroun
CPC classification number: G01S15/04
Abstract: Ultrasonic audio processing circuitry and a method useful in ultrasonic presence detection. An ultrasonic burst generator produces an ultrasonic burst signal at one or more ultrasonic frequencies, and an equalizer equalizes that ultrasonic burst signal according to frequency response characteristics of the speaker and microphone at those ultrasonic frequencies. Driver circuitry drives a speaker with the ultrasonic burst signal, which may be combined with an audible audio signal. An ultrasonic separation filter separates an ultrasonic portion from a signal received at a microphone, and processing circuitry is provided to determine a delay time of an echo corresponding to the ultrasonic burst signal in that separated ultrasonic portion of the received signal. In another aspect, the equalizer equalizes an ultrasonic portion of the signal received at a microphone, according to frequency response characteristics of the speaker and microphone at the ultrasonic frequencies of the burst.
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公开(公告)号：US11885834B2
公开(公告)日：2024-01-30
申请号：US17463112
申请日：2021-08-31
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Lei Ding , Srinath Mathur Ramaswamy , Dok Won Lee , Baher Haroun , Wai Lee , Steven John Loveless
CPC classification number: G01R15/202 , G01R19/10
Abstract: In a described example, a circuit includes a sensor circuit including multiple magnetic field sensors having respective sensor outputs. The magnetic field sensors are configured to provide magnetic field sensor signals at the respective sensor outputs representative of a measure of current flow through a conductive structure. A combiner interface has combiner inputs and a combiner output. The combiner inputs are coupled to the respective sensor outputs. The combiner interface is configured to provide an aggregate sensor measurement at the combiner output responsive to the magnetic field sensor signals, in which the aggregate sensor measurement is decoupled from magnetic fields generated responsive to the current flow through the conductive structure.
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公开(公告)号：US20230003880A1
公开(公告)日：2023-01-05
申请号：US17364011
申请日：2021-06-30
Applicant: Texas Instruments Incorporated
Inventor： Lei Ding , Srinath Mathur Ramaswamy , Brian Burk , Baher Haroun
IPC: G01S15/04
Abstract: Ultrasonic audio processing circuitry and a method useful in ultrasonic presence detection. An ultrasonic burst generator produces an ultrasonic burst signal at one or more ultrasonic frequencies, and an equalizer equalizes that ultrasonic burst signal according to frequency response characteristics of the speaker and microphone at those ultrasonic frequencies. Driver circuitry drives a speaker with the ultrasonic burst signal, which may be combined with an audible audio signal. An ultrasonic separation filter separates an ultrasonic portion from a signal received at a microphone, and processing circuitry is provided to determine a delay time of an echo corresponding to the ultrasonic burst signal in that separated ultrasonic portion of the received signal. In another aspect, the equalizer equalizes an ultrasonic portion of the signal received at a microphone, according to frequency response characteristics of the speaker and microphone at the ultrasonic frequencies of the burst.
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