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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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22.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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23.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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24.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：US20230052689A1
公开(公告)日：2023-02-16
申请号：US17875840
申请日：2022-07-28
Applicant: Texas Instruments Incorporated
Inventor： Lei Ding , Srinath Mathur Ramaswamy , Dok Won Lee , Steven Howard
Abstract: Current sensing techniques. In an example, a current sensing method includes: generating a first magnetic field measurement; generating a second magnetic field measurement; generating a frequency estimate of a current; calculating a root-mean-square (RMS) value of an estimated amplitude of the current; and generating a temperature estimate of an integrated circuit (IC) configured to perform the method. The method also includes generating a first weighting factor and a second weighting factor based on the frequency estimate, the RMS value, and the temperature estimate, the first weighting factor to control amplification of the first magnetic field measurement and the second weighting factor to control amplification of the second magnetic field measurement.
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公开(公告)号：US11378686B2
公开(公告)日：2022-07-05
申请号：US16232308
申请日：2018-12-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Lei Ding , Srinath Mathur Ramaswamy , Anand Dabak
IPC: G01S17/58 , G01S17/93 , G01S7/53 , G01S15/58 , G01S15/931
Abstract: An ultrasound detect circuit includes a decimator that decimates a transmit signal to be transmitted through an ultrasonic transducer. The transmit signal is decimated to generate first and second template signals. The decimator uses a different decimation ratio to generate the first template signal than the second template signal. The circuit also includes a first correlator to correlate a signal derived from the ultrasonic transducer with the first template signal, aa second correlator to correlate the signal derived from the ultrasonic transducer with the second template signal, and a Doppler shift determination circuit to determine a Doppler frequency shift based on an output from the first correlator and an output from the second correlator.
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公开(公告)号：US11346941B2
公开(公告)日：2022-05-31
申请号：US16364613
申请日：2019-03-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Lei Ding , Srinath Mathur Ramaswamy , Anand Gopalan , Michael John Zroka
Abstract: Ultrasonic sensing systems and associated methods provide side-lobe reduction to improve the acoustic detection of small objects, the signature envelope peaks of which can otherwise be obscured by subsidiary envelope peaks in side lobes that result from residual correlation between a signal received by an ultrasonic transducer and a template signal corresponding to a burst signal emitted by the ultrasonic transducer. A shaping signal by which the amplitude of the burst signal can be varied with respect to time is taken into account in the template signal, and correlator circuitry correlates a signal derived from the ultrasonic transducer with the template signal to produce a correlated output exhibiting the desired side-lobe reduction. The distance from the transducer to the detected object can thereby be determined with enhanced accuracy and responsiveness.
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