公开(公告)号：US11226211B2

公开(公告)日：2022-01-18

申请号：US14801810

申请日：2015-07-16

Applicant: Texas Instruments Incorporated

Inventor： Joyce Mullenix ,  George Reitsma

IPC: G01D5/22 ,  G06F3/00 ,  G01D5/20

Abstract: A position detecting system detects and responds to the movement of a target through a sensing domain area of a plane. The movement causes the amount of the target that lies within a first sensing domain area of a first sensor to change. A second sensor detects a height from the plane to a sensor for enhancing accuracy of measurements from the first sensor.

公开(公告)号：US20170059735A1

公开(公告)日：2017-03-02

申请号：US15255145

申请日：2016-09-02

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： George Reitsma

IPC: G01V3/10 ,  G01D5/22

CPC classification number: G01V3/101 ,  G01D5/22 ,  G01D5/2208 ,  G01D5/243

Abstract: For inductive sensing (such as for proximity switching), differential inductance readout is based on Sense/Reference resonators implemented as LC-ring oscillators, with LS/LR inductor coils and a shared (time-multiplexed) resonator capacitor. The ring oscillators include matched Lsense/Lref drivers time-multiplexed (by out enable signals), to provide Lsense/Lref resonator excitation signals to the Lsense/Lref resonators, based on resulting Lsense/Lref resonance measurements (such as of resonance state) acquired by the ring oscillators from the Lsense/Lref resonators. Differential readout data is based on the time-multiplexed Lsense/Lref resonance measurements, corresponding respectively to LS/LR coil inductances (such as based on Lsense/Lref resonator oscillation frequency). The ring oscillators can be implemented with a Schmitt trigger, converting analog resonance measurements into digital input to the Lsense/Lref drivers. Driver matching and layout matching can be used to improve accuracy. Effects of parasitic capacitance at the driver outputs can be suppressed by shorting or bootstrapping across the inactive LS/LR coil inductances.

Abstract translation: 对于感性感应（例如接近开关），差分电感读数基于实现为LC环形振荡器的感应/参考谐振器，LS / LR电感线圈和共享（时间复用）谐振电容器。 基于获得的Lsense / Lref共振测量（例如共振状态），环形振荡器包括经时间复用（通过输出使能信号）的匹配Lsense / Lref驱动器，以向Lsense / Lref谐振器提供Lsense / Lref谐振器激励信号 来自Lsense / Lref谐振器的环形振荡器。 差分读出数据基于时间复用的Lsense / Lref共振测量，分别对应于LS / LR线圈电感（例如基于Lsense / Lref谐振器振荡频率）。 环形振荡器可以用施密特触发器实现，将模拟谐振测量转换为数字输入到Lsense / Lref驱动器。 驾驶员匹配和布局匹配可用于提高精度。 驱动器输出端的寄生电容的影响可以通过短路或自举穿过无源LS / LR线圈电感来抑制。

公开(公告)号：US10295694B2

公开(公告)日：2019-05-21

申请号：US15255145

申请日：2016-09-02

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： George Reitsma

IPC: G01V3/10 ,  G01D5/22 ,  G01D5/243

Abstract: For inductive sensing (such as for proximity switching), differential inductance readout is based on Sense/Reference resonators implemented as LC-ring oscillators, with LS/LR inductor coils and a shared (time-multiplexed) resonator capacitor. The ring oscillators include matched Lsense/Lref drivers time-multiplexed (by out enable signals), to provide Lsense/Lref resonator excitation signals to the Lsense/Lref resonators, based on resulting Lsense/Lref resonance measurements (such as of resonance state) acquired by the ring oscillators from the Lsense/Lref resonators. Differential readout data is based on the time-multiplexed Lsense/Lref resonance measurements, corresponding respectively to LS/LR coil inductances (such as based on Lsense/Lref resonator oscillation frequency). The ring oscillators can be implemented with a Schmitt trigger, converting analog resonance measurements into digital input to the Lsense/Lref drivers. Driver matching and layout matching can be used to improve accuracy. Effects of parasitic capacitance at the driver outputs can be suppressed by shorting or bootstrapping across the inactive LS/LR coil inductances.

公开(公告)号：US20160069662A1

公开(公告)日：2016-03-10

申请号：US14801810

申请日：2015-07-16

Applicant: Texas Instruments Incorporated

Inventor： Joyce Mullenix ,  George Reitsma

IPC: G01B7/14 ,  G01D5/22 ,  H01F27/28

CPC classification number: G01D5/22 ,  G01D5/202 ,  G01D5/2225

Abstract: A position detecting system detects and responds to the movement of a target through a sensing domain area of a plane. The movement causes the amount of the target that lies within a first sensing domain area of a first sensor to change. A second sensor detects a height from the plane to a sensor for enhancing accuracy of measurements from the first sensor.

Abstract translation: 位置检测系统通过平面的感测域区域来检测和响应目标的移动。 移动导致位于第一传感器的第一感测区域内的目标的量改变。 第二传感器检测从平面到传感器的高度，以增强来自第一传感器的测量精度。

公开(公告)号：US10727797B2

公开(公告)日：2020-07-28

申请号：US16454104

申请日：2019-06-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： George Reitsma

IPC: H03F1/02 ,  H03F3/45 ,  H03D7/16 ,  H03D7/14 ,  H03L7/197 ,  H03L7/087 ,  H03L7/089 ,  H03F1/08 ,  H03F3/217 ,  H03F3/345

Abstract: A circuit includes a first signal swapper including a first terminal coupled to a first current source, a second terminal coupled to a second current source, a third terminal coupled to a first current terminal of a first transistor, and a fourth terminal coupled to a third current terminal of a second transistor. The first signal swapper couples the first and second terminals to the third and fourth terminals responsive to a first control signal. First and second switches couple to a gate of the first transistor. The first switch receives the input oscillation signal and the second switch receives a first reference voltage. Third and fourth switches couple to a gate of the second transistor. The third switch receives the input oscillation signal and the fourth switch receives the first reference voltage. A second signal swapper couples to the first signal swapper and to the first and second transistors.

公开(公告)号：US10381992B1

公开(公告)日：2019-08-13

申请号：US15899598

申请日：2018-02-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： George Reitsma

IPC: H03F3/45 ,  H03D7/16 ,  H03D7/14 ,  H03L7/197 ,  H03L7/087 ,  H03L7/089 ,  H03F1/08

CPC classification number: H03F3/45475 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/165 ,  H03F1/086 ,  H03L7/087 ,  H03L7/0898 ,  H03L7/1976

Abstract: A circuit includes a first signal swapper including a first terminal coupled to a first current source, a second terminal coupled to a second current source, a third terminal coupled to a first current terminal of a first transistor, and a fourth terminal coupled to a third current terminal of a second transistor. The first signal swapper couples the first and second terminals to the third and fourth terminals responsive to a first control signal. First and second switches couple to a gate of the first transistor. The first switch receives the input oscillation signal and the second switch receives a first reference voltage. Third and fourth switches couple to a gate of the second transistor. The third switch receives the input oscillation signal and the fourth switch receives the first reference voltage. A second signal swapper couples to the first signal swapper and to the first and second transistors.

公开(公告)号：US10483953B2

公开(公告)日：2019-11-19

申请号：US15891032

申请日：2018-02-07

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： George Reitsma

IPC: H03K5/135 ,  H03L7/099 ,  H03L7/18 ,  H03L7/23 ,  H03K3/03

Abstract: A circuit includes a ring oscillator and a state capture register to receive a multi-bit state of the ring oscillator captured upon occurrence of an edge of input periodic signal. The circuit also includes an edge-phase detector to assert an edge detect high signal in response to a first reference clock derived from the ring oscillator being high upon occurrence of the edge of the input periodic signal and to assert an edge detect low signal in response to the first reference clock derived from the ring oscillator being low upon occurrence of the edge of the input periodic signal. A first register receives data from the state capture register upon occurrence of one of a rising or falling edge of a second clock derived from the ring oscillator.

公开(公告)号：US20160003663A1

公开(公告)日：2016-01-07

申请号：US14790355

申请日：2015-07-02

Applicant: Texas Instruments Incorporated

Inventor： Daniele Miatton ,  Athos Canclini ,  Dongtai Liu ,  Evgeny Fomin ,  George Reitsma ,  Riccardo Tarelli

IPC: G01F23/26

CPC classification number: G01F23/263 ,  G01F23/266 ,  G01F23/268

Abstract: Capacitive liquid level measurement uses differential out-of-phase (OoP) channel drive to counteract human body capacitance. In an example embodiment, a container assembly includes a capacitive sensor with symmetrical CHx and CHy capacitor electrodes, corresponding in height to a liquid level measurement range. A CHx driver provides a CHx excitation/drive to the CHx electrode, and a CHy driver provides OoP CHy excitation/drive to the CHy electrode that is substantially 180 degrees out-of-phase with the CHx drive. Capacitance associated with the liquid level is measured by acquiring capacitance measurements through the CHx channel (such as based on capacitive charge transfer), and converting the capacitance measurements to an analog voltage corresponding to liquid-level capacitance (which can then be converted to digital data). The capacitive sensor can be configured with SHLDx/SHLDy shields disposed behind, and driven in phase with, respective CHx/CHy electrodes.

Abstract translation: 电容液位测量使用差分异相（OoP）通道驱动来抵消人体电容。 在示例性实施例中，容器组件包括具有对称CHx和CHy电容器电极的电容传感器，其高度对应于液位测量范围。 CHx驱动器为CHx电极提供CHx激励/驱动，CHy驱动器向CHy驱动器提供OoP CHy激励/驱动，与CHx驱动器基本上为180度异相。 通过采用CHx通道（例如基于电容电荷转移）获取电容测量值，并将电容测量值转换为与液位电容相对应的模拟电压（然后将其转换为数字数据）来测量与液位相关的电容 ）。 电容传感器可以配置有SHLDx / SHLDy屏蔽，其布置在相应的CHx / CHy电极的后面并与其相驱动。