公开(公告)号：US20180109186A1

公开(公告)日：2018-04-19

申请号：US15296839

申请日：2016-10-18

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： GANGQIANG ZHANG ,  VAIBHAV GARG ,  XIAOCHUN ZHAO ,  ANGELO W.D. PEREIRA ,  VIJAYALAKSHMI DEVARAJAN

IPC分类号： H02M3/158 ,  H02M1/08

CPC分类号： H02M3/158 ,  H02M1/08 ,  H02M2001/0009 ,  H02M2001/0032 ,  H02M2003/1566

摘要： One example includes a switching power supply. The switching power supply includes a power stage, a feedback loop, and a simulated feedback error generator. The power stage provides an output signal in response to a switching signal. The feedback loop monitors the output signal and provides a feedback error signal to adjust the switching signal to regulate the output signal. The simulated feedback error generator temporarily provides a simulated feedback error signal during a transition period from the low power mode to a high power mode of the switching power supply until the feedback loop has enough time to provide the feedback error signal.

公开(公告)号：US20190339386A1

公开(公告)日：2019-11-07

申请号：US16364652

申请日：2019-03-26

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： LEI DING ,  SRINATH MATHUR RAMASWAMY ,  ANAND GOPALAN ,  VAIBHAV GARG ,  ANAND GANESH DABAK ,  BAHER S. HAROUN

IPC分类号： G01S15/10 ,  G01S15/93 ,  G01S15/58 ,  G01S15/32

摘要： 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.

公开(公告)号：US20200033462A1

公开(公告)日：2020-01-30

申请号：US16364691

申请日：2019-03-26

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： LEI DING ,  SRINATH MATHUR RAMASWAMY ,  VAIBHAV GARG ,  ANAND GOPALAN

IPC分类号： G01S7/536 ,  G01S15/32

摘要： 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.