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1.发明申请公开(公告)号：US20190020338A1
公开(公告)日：2019-01-17
申请号：US15647825
申请日：2017-07-12
Applicant: Texas Instruments Incorporated
Inventor： Shanmuganand Chellamuthu , Kemal Safak Demirci , Anand Gopalan
CPC classification number: H03K17/145 , G05F1/56
Abstract: A voltage regulator and a gate control circuit for an aid transistor coupled to assist a pass element for the voltage regulator during line transients having a given slope are disclosed. The gate control circuit includes a first circuit coupled to receive an output voltage of the voltage regulator on a first node and to provide a gate control voltage that mirrors the output voltage on a second node. A low pass filter is coupled to receive the gate control voltage and to provide a filtered gate control voltage to the gate of the aid transistor.
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公开(公告)号：US20240411017A1
公开(公告)日：2024-12-12
申请号：US18393905
申请日：2023-12-22
Applicant: Texas Instruments Incorporated
Inventor： LEI DING , Srinath Mathur Ramaswamy , Anand Gopalan , Vaibhav Garg , Anand Ganesh Dabak
IPC: G01S15/10 , G01S7/526 , G01S15/931
Abstract: In one example, a method comprises using a first transducer, emitting a first acoustic signal representing a first code. The method further comprises using the first transducer, receiving a second acoustic signal, and converting the second acoustic signal to a sensor signal. The method further comprises computing a time-of-flight for the second acoustic signal based on a time difference between when the first transducer emits the first acoustic signal and when the first transducer receives the second acoustic signal. The method further comprises responsive to the correlation result indicating that the third acoustic signal is a reflection of a third acoustic signal emitted by a second transducer: determining a delay time between when the first transducer emits the first acoustic signal and when the second transducer emits the third acoustic signal; adjusting the time-of-flight based on the delay time; and providing a distance measurement based on the adjusted time-of-flight.
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3.发明授权公开(公告)号：US11716072B1
公开(公告)日：2023-08-01
申请号：US17682619
申请日：2022-02-28
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ashish Ojha , Priyank Anand , Anand Gopalan , Krishnamurthy Shankar
IPC: H03K3/00 , H03K3/011 , H03K17/687
CPC classification number: H03K3/011 , H03K17/6874 , H03K2217/0063 , H03K2217/0072
Abstract: Examples of contactor controllers, systems and methods time-modulate levels of high-side (HS) and low-side (LS) clamp voltages in a contactor controller to switch a path through which current flows during quick-turn-off (QTO) of the contactor controller. One of the clamp voltages is at a high level and the other is at a low level. The output voltage of the contactor controller is held at the low level. The path switching may be a function of one or more parameters. In a configuration, the level of a supply voltage of the contactor controller is monitored and used to control the path switching. In a configuration, temperatures of HS and LS transistors of the contactor controller are monitored and used to control the path switching. Control of the path switching may be performed to dissipate power in a larger area to increase thermal performance of the contactor controller. Both clamps may remain active throughout the QTO process, providing redundancy and safety.
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公开(公告)号：US20230268153A1
公开(公告)日：2023-08-24
申请号：US17680119
申请日：2022-02-24
Applicant: Texas Instruments Incorporated
Inventor： Anand Gopalan , Nicholas Oborny , Milos Acanski
CPC classification number: H01H47/002 , H01H47/32 , H01H85/30 , H01H2047/003
Abstract: A method of detecting welded contacts in a relay. The method includes performing, at a first point in time, the applying of a drive to the activation coil to conduct a coil current through the activation coil, the coil current increasing to a first current level, the first current level being less than a pull-in current of the relay; responsive to the coil current reaching the first current level, turning off the drive to the activation coil to discharge the coil current at a first clamping voltage; and measuring a first discharge time corresponding to a first inductance from the turning off of the drive to the activation coil to the coil current reaching a second current level, the second current level being less than the first current level. These operations are repeated at a second point in time to obtain a second inductance. Comparison of the first inductance and second inductance determines whether a difference between the first and second inductances exceeds a comparison criterion.
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公开(公告)号：US11733377B2
公开(公告)日：2023-08-22
申请号：US16364652
申请日：2019-03-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Lei Ding , Srinath Mathur Ramaswamy , Anand Gopalan , Vaibhav Garg , Anand Ganesh Dabak , Baher S. Haroun
IPC: G01S15/10 , G01S15/931 , G01S15/32 , G01S15/58
CPC classification number: G01S15/104 , G01S15/325 , G01S15/582 , G01S15/931 , G01S2015/938
Abstract: In an ultrasonic detection system that uses frequency-modulation or phase-modulation coding to distinguish emitted bursts from multiple transducers, a receiver associated with a transducer uses peak search, peak buffer, and peak rank stages in one or more receiver signal processing paths to identify valid received ultrasonic signal envelope peaks in correlator outputs. The peak rank stage can support different modes respectively designed to handle one code, two or more codes, or two or more codes with support for Doppler frequency shift detection. Valid peak information (e.g., amplitude and time) can be reported to a central controller and/or stored locally in a fusion stage to generate more intelligent information for targets or obstacles using peaks from multiple bursts.
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Patent Agency Ranking
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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7.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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公开(公告)号：US10382030B2
公开(公告)日：2019-08-13
申请号：US15647825
申请日：2017-07-12
Applicant: Texas Instruments Incorporated
Inventor： Shanmuganand Chellamuthu , Kemal Safak Demirci , Anand Gopalan
Abstract: A voltage regulator and a gate control circuit for an aid transistor coupled to assist a pass element for the voltage regulator during line transients having a given slope are disclosed. The gate control circuit includes a first circuit coupled to receive an output voltage of the voltage regulator on a first node and to provide a gate control voltage that mirrors the output voltage on a second node. A low pass filter is coupled to receive the gate control voltage and to provide a filtered gate control voltage to the gate of the aid transistor.
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公开(公告)号：US11817281B2
公开(公告)日：2023-11-14
申请号：US17680119
申请日：2022-02-24
Applicant: Texas Instruments Incorporated
Inventor： Anand Gopalan , Nicholas Oborny , Milos Acanski
CPC classification number: H01H47/002 , H01H47/32 , H01H85/30 , H01H2047/003
Abstract: A method of detecting welded contacts in a relay. The method includes performing, at a first point in time, the applying of a drive to the activation coil to conduct a coil current through the activation coil, the coil current increasing to a first current level, the first current level being less than a pull-in current of the relay; responsive to the coil current reaching the first current level, turning off the drive to the activation coil to discharge the coil current at a first clamping voltage; and measuring a first discharge time corresponding to a first inductance from the turning off of the drive to the activation coil to the coil current reaching a second current level, the second current level being less than the first current level. These operations are repeated at a second point in time to obtain a second inductance. Comparison of the first inductance and second inductance determines whether a difference between the first and second inductances exceeds a comparison criterion.
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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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