公开(公告)号：US20210204114A1

公开(公告)日：2021-07-01

申请号：US16730485

申请日：2019-12-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Feng L. MO ,  Jianwei ZHOU ,  Xiaolin LU ,  Il Han KIM ,  Kaichien TSAI

IPC: H04W12/00 ,  H04W12/04 ,  H04W40/24 ,  H04L12/733 ,  H04L12/751 ,  H04L9/08

Abstract: A multi-hop mesh network includes a root network device and a first network device. The first network device is configured to establish a first direct wireless connection with the root network device and negotiate a first shared secret key with the root network device. The multi-hop network further includes a second network device configured to establish a second direct wireless connection with the first network device and negotiate a second shared secret key with the first network device.

公开(公告)号：US20240361238A1

公开(公告)日：2024-10-31

申请号：US18309468

申请日：2023-04-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Pulak SARANGI ,  Kaichien TSAI ,  Boyu SHEN ,  Anand G. DABAK

IPC: G01N21/53

CPC classification number: G01N21/53 ,  G01N2201/0698 ,  G01N2201/1247 ,  G01N2201/129

Abstract: In some examples, a method includes transmitting first light pulses according to a pre-determined pulse pattern in a first measurement period. The method also includes transmitting second light pulses according to the pre-determined pulse pattern in a second measurement period consecutive to the first measurement period, in which at least some of the first and second light pulses being unequally spaced in time across the first and second measurement periods. The method also includes receiving first detection signals representing detection of the first light pulses. The method also includes receiving second detection signals representing detection of the second light pulses. The method also includes providing a first light scattering measurement signal representing the first measurement period responsive to the first detection signals. The method also includes providing a second light scattering measurement signal representing the second measurement period responsive to the second detection signals.

公开(公告)号：US20170269134A1

公开(公告)日：2017-09-21

申请号：US15072926

申请日：2016-03-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Minghua FU ,  Kaichien TSAI ,  Prashanth SAIDU

IPC: G01R21/133 ,  G01R35/00

CPC classification number: G01R21/133 ,  G01R35/005

Abstract: A system such as an electric meter includes a single-ended analog-to-digital converter which is susceptible to crosstalk. Methods and apparatus are disclosed to calibrate and cancel crosstalk effects. The system determines whether voltage-induced cross-talk is in-phase or out-of-phase with respect to voltage. The system determines a first calibration factor based on minimum and maximum measured current values and voltage. If the cross-talk is in-phase, the system sets a second calibration factor to 0. If the cross-talk is out-of-phase, the system computes the second calibration factor based on a measured current when a power factor angle is set to 90 degrees. Calibration factors may be stored in the multi-channel system. In use, the system measures current and voltage and computes the actual current, voltage and power based on the measured current and voltage by employing a crosstalk cancellation technique using the calibration factors.