公开(公告)号：US11416096B2

公开(公告)日：2022-08-16

申请号：US15972410

申请日：2018-05-07

Applicant: Texas Instruments Incorporated

Inventor： Kangcheng Xu ,  Jun Zhang

IPC: G06F3/044 ,  G06F3/041

Abstract: A capacitive touch sensing device, with: (i) a logical array of capacitive buttons have a number R of rows and a number C of columns; (ii) a first node coupled to a first column in the number C of columns, the first node for receiving a first transmit voltage; (iii) a second node coupled to a second column in the number C of columns, the second node for receiving a second transmit voltage; (iv) a number of intermediate nodes between the first node and the second node, wherein each intermediate node is coupled to a respective column in the number C of columns; and (v) circuitry for applying a respective different voltage to each of the intermediate nodes in response to the first transmit voltage and the second transmit voltage.

公开(公告)号：US11060889B2

公开(公告)日：2021-07-13

申请号：US15704292

申请日：2017-09-14

Applicant: Texas Instruments Incorporated

Inventor： Rujun Ji ,  Jun Zhang ,  Lichang Cheng ,  Kangcheng Xu

IPC: G01D5/24 ,  H02K11/21 ,  G01D5/241

Abstract: Methods and apparatus to determine a position of a rotatable shaft of a motor are disclosed. An example apparatus to determine a position of a rotatable shaft of a motor includes a sensor printed circuit board (PCB) structured to be mounted to a motor, the sensor PCB including a plurality of capacitive sensors, the plurality of capacitive sensors having respective ones of a plurality of capacitances that independently change as a conductor moves relative to the sensor PCB in conjunction with a rotatable shaft of the motor during an operation of the motor, and a controller electrically coupled to the sensor PCB, the controller configured to determine a position of the rotatable shaft based on the plurality of capacitances.

公开(公告)号：US20250168144A1

公开(公告)日：2025-05-22

申请号：US18511674

申请日：2023-11-16

Applicant: Texas Instruments Incorporated

Inventor： Shuai He ,  Chao Gao ,  Kangcheng Xu

IPC: H04L61/5038 ,  H04L12/40

Abstract: An example apparatus includes a counter, an analog-to-digital converter, communication circuitry, and control circuitry configurable. The example analog-to-digital converter is configurable to sample a first voltage at a first node on a bus. The example communication circuitry is configurable to set a second node on the bus to a second voltage. Additionally, the example control circuitry is configurable to increment the counter when the first voltage does not satisfy a threshold value and, when the first voltage satisfies the threshold value, assign an address for the device based on a value of the counter.

公开(公告)号：US20210302209A1

公开(公告)日：2021-09-30

申请号：US17346472

申请日：2021-06-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rujun Ji ,  Jun Zhang ,  Lichang Cheng ,  Kangcheng Xu

IPC: G01D5/24 ,  H02K11/21 ,  G01D5/241

Abstract: Methods and apparatus to determine a position of a rotatable shaft of a motor are disclosed. An example apparatus to determine a position of a rotatable shaft of a motor includes a sensor printed circuit board (PCB) structured to be mounted to a motor, the sensor PCB including a plurality of capacitive sensors, the plurality of capacitive sensors having respective ones of a plurality of capacitances that independently change as a conductor moves relative to the sensor PCB in conjunction with a rotatable shaft of the motor during an operation of the motor, and a controller electrically coupled to the sensor PCB, the controller configured to determine a position of the rotatable shaft based on the plurality of capacitances.

公开(公告)号：US20240319280A1

公开(公告)日：2024-09-26

申请号：US18307934

申请日：2023-04-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yicheng Zhou ,  Xiaodong Li ,  Kangcheng Xu

IPC: G01R31/374 ,  G01R31/3842 ,  G01R35/00 ,  H03M1/12

CPC classification number: G01R31/374 ,  G01R31/3842 ,  G01R35/005 ,  H03M1/1245 ,  H02J7/0048

Abstract: Various examples disclosed herein relate to current sensing via current sensing circuitry, and more particularly, to calibrating current sensing circuitry to dynamically detect current ranges across a load. In an example embodiment, a microcontroller unit (MCU) is provided herein that includes a processor and current sensing circuitry coupled to the processor. The current sensing circuitry of the MCU is configured to measure voltages associated with a load. The processor of the MCU is configured to obtain the measured voltages from the current sensing circuitry, identify a temperature drift of the current sensing circuitry that exceeds a threshold value, update parameters with which to determine a current associated with the load based on the temperature drift, and determine the current associated with the load based on the updated parameters and the measured voltages.

公开(公告)号：US11933645B2

公开(公告)日：2024-03-19

申请号：US17346472

申请日：2021-06-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rujun Ji ,  Jun Zhang ,  Lichang Cheng ,  Kangcheng Xu

IPC: G01D5/24 ,  G01D5/241 ,  H02K11/21

CPC classification number: G01D5/2403 ,  G01D5/2415 ,  H02K11/21 ,  H02K2211/03

Abstract: Methods and apparatus to determine a position of a rotatable shaft of a motor are disclosed. An example apparatus to determine a position of a rotatable shaft of a motor includes a sensor printed circuit board (PCB) structured to be mounted to a motor, the sensor PCB including a plurality of capacitive sensors, the plurality of capacitive sensors having respective ones of a plurality of capacitances that independently change as a conductor moves relative to the sensor PCB in conjunction with a rotatable shaft of the motor during an operation of the motor, and a controller electrically coupled to the sensor PCB, the controller configured to determine a position of the rotatable shaft based on the plurality of capacitances.