公开(公告)号：US20220397595A1

公开(公告)日：2022-12-15

申请号：US17820175

申请日：2022-08-16

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jun Zhang ,  Yaohua Pan

IPC: G01R27/26 ,  G05F3/26 ,  G06F3/044 ,  H03K17/96

Abstract: A system operable between a charging mode and a transferring mode for measuring capacitance of a capacitive sensor, includes a switching unit configured to, in a first phase of the charging mode, arrange the capacitive sensor to be charged by a first supply voltage from a first end of the capacitive sensor until a voltage difference between the first end and an opposite second end of the capacitive sensor reaches a first predetermined voltage, and in a second phase of the charging mode, disconnect the first end of the capacitive sensor from the first supply voltage and couple the second end of the capacitive sensor (10) to a second supply voltage to raise a voltage at the first end of the capacitive sensor to a second predetermined voltage.

公开(公告)号：US11301091B2

公开(公告)日：2022-04-12

申请号：US17015210

申请日：2020-09-09

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ge Shen ,  Jun Zhang ,  Songhua Hu ,  Yi Zhou

IPC: G06F3/044 ,  G06F3/041

Abstract: A circuit includes a timer to count edges of a clock from an initial count value to a terminal count value and to output a timer signal responsive to the terminal count value being reached. A random number generator circuit generates a plurality of random number values. Each generated random number value is sequentially loaded into the timer as one of the initial count value or the terminal count value. A capacitive sensor circuit determines, responsive to receipt of a plurality of timer signals from the timer, a touch event of a capacitive touch sensor.

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：US10802656B2

公开(公告)日：2020-10-13

申请号：US16257546

申请日：2019-01-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ge Shen ,  Jun Zhang ,  Songhua Hu ,  Yi Zhou

IPC: G06F3/044 ,  G06F3/041

Abstract: A circuit includes a timer to count edges of a clock from an initial count value to a terminal count value and to output a timer signal responsive to the terminal count value being reached. A random number generator circuit generates a plurality of random number values. Each generated random number value is sequentially loaded into the timer as one of the initial count value or the terminal count value. A capacitive sensor circuit determines, responsive to receipt of a plurality of timer signals from the timer, a touch event of a capacitive touch sensor.

公开(公告)号：US10684143B2

公开(公告)日：2020-06-16

申请号：US15704179

申请日：2017-09-14

Applicant: Texas Instruments Incorporated

Inventor： Lichang Cheng ,  Jun Zhang ,  Rujun Ji

IPC: G01D5/241 ,  G01R27/26 ,  F16C41/00

Abstract: Example capacitive-sensing rotary encoders and methods are disclosed herein. An example apparatus includes a rotary encoder structured to be mounted to a motor, the rotary encoder including a plurality of circumferential capacitive sensor arrays, each of the plurality of capacitive sensor arrays having an output representing a binary bit of a rotary encoder output, the rotary encoder output changing as a conductor rotates responsive to a rotatable shaft of the motor relative to the rotary encoder.

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.

公开(公告)号：US11843390B2

公开(公告)日：2023-12-12

申请号：US18179428

申请日：2023-03-07

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jun Zhang

IPC: H03M1/06 ,  H03M1/68 ,  H03M1/80 ,  H03M1/78 ,  H03M1/76 ,  H03M7/16

CPC classification number: H03M1/0607 ,  H03M1/68 ,  H03M1/765 ,  H03M1/785 ,  H03M1/808 ,  H03M7/16

Abstract: A digital-to-analog converter for generating an analog output voltage in response to a digital value comprising a plurality of bits, the converter including: (i) a first switched resistor network having a first configuration and for converting a first input differential signal into a first analog output in response to a first set of bits in the plurality of bits; and (ii) a second switched resistor network, coupled to the first switched resistor network, having a second configuration, differing from the first configuration, and for converting a second input differential signal into a second analog output in response to a second set of bits in the plurality of bits.

公开(公告)号：US20230275583A1

公开(公告)日：2023-08-31

申请号：US18314217

申请日：2023-05-09

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yaohua Pan ,  Jun Zhang

IPC: H03K17/96 ,  H03K17/945

CPC classification number: H03K17/9622 ,  H03K17/945 ,  H03K2217/960755

Abstract: A system for sensing touch or proximity include: a first number of input terminals configured to couple one or more capacitive sensors, a second number of transferring units configured to transfer charges from the one or more capacitive sensors through the first number of input terminals in transferring phases of cycles of the one or more capacitive sensor, wherein at least one of the first and second numbers is equal to or greater than two, and a first switching unit, coupled between the first number of input terminals and the second number of transferring units, configured to selectively electrically couple any one of the first number of input terminals to any one of the second number of transferring units in the transferring phases.

公开(公告)号：US20230208426A1

公开(公告)日：2023-06-29

申请号：US18179428

申请日：2023-03-07

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jun Zhang

IPC: H03M1/06 ,  H03M1/68 ,  H03M1/80 ,  H03M1/78 ,  H03M1/76

CPC classification number: H03M1/0607 ,  H03M1/68 ,  H03M1/808 ,  H03M1/785 ,  H03M1/765 ,  H03M7/16

Abstract: A digital-to-analog converter for generating an analog output voltage in response to a digital value comprising a plurality of bits, the converter including: (i) a first switched resistor network having a first configuration and for converting a first input differential signal into a first analog output in response to a first set of bits in the plurality of bits; and (ii) a second switched resistor network, coupled to the first switched resistor network, having a second configuration, differing from the first configuration, and for converting a second input differential signal into a second analog output in response to a second set of bits in the plurality of bits.

公开(公告)号：US20230110204A1

公开(公告)日：2023-04-13

申请号：US18061512

申请日：2022-12-05

Applicant: Texas Instruments Incorporated

Inventor： Jun Zhang

IPC: H03M1/18 ,  H03G1/00 ,  H03G3/20 ,  H03F1/38 ,  H03M3/00 ,  H03F3/45 ,  H03G3/00

Abstract: A circuit includes an operational amplifier and a resistor network coupled to an output of the operational amplifier. The resistor network includes a first set of resistors coupled between the output of the operational amplifier and a first node of the resistor network, wherein the resistors of the first set are electrically connected in series with each other, a second set of resistors coupled between the first node and a second node of the resistor network, wherein the resistors of the second set are electrically connected in series with each other and include a first number of resistors, a third set of resistors coupled between the second node and a third node of the resistor network, wherein the third node is coupled to a first voltage, and wherein the resistors of the third set are electrically connected in parallel with each other and include a second number of resistors, and a resistor coupled between the first node and the second node and arranged in parallel with the second set of resistors.