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公开(公告)号：US08791753B2
公开(公告)日：2014-07-29
申请号：US13591136
申请日：2012-08-21
CPC分类号： H03F3/3022 , H03F3/45192 , H03F3/45475 , H03F2203/45514 , H03F2203/45536
摘要： Embodiments of a capacitance sensing system including an integrating amplifier and methods for operating the same to provide a higher slew rate and bandwidth are described. In one embodiment, the integrating amplifier comprises an input stage including an inverting input coupled to an electrode of a capacitor to sense a capacitance and a non-inverting input coupled to a reference potential, and an output stage including a compensating capacitor coupled to an output. The compensating capacitor comprises two smaller capacitors coupled in parallel and a switching element configured to open when the integrating amplifier is operated in a RESET mode decoupling one of the two smaller capacitors from the output to decrease capacitance of the compensating capacitor.
摘要翻译： 描述了包括积分放大器的电容感测系统及其操作以提供更高转换速率和带宽的方法的实施例。 在一个实施例中，积分放大器包括输入级，该输入级包括耦合到电容器的电极的反相输入，用于感测耦合到参考电位的电容和非反相输入;以及输出级，包括耦合到输出的补偿电容 。 补偿电容器包括并联耦合的两个较小的电容器，以及开关元件，其被配置为当积分放大器在RESET模式下操作时断开，以从输出中去耦两个较小的电容器中的一个，以减小补偿电容器的电容。
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公开(公告)号：US20090267824A1
公开(公告)日：2009-10-29
申请号：US12304711
申请日：2007-05-18
申请人： Timothy S. Cooper , Gerard Baldwin , Ronan Farrell
发明人： Timothy S. Cooper , Gerard Baldwin , Ronan Farrell
IPC分类号： H01Q3/26
摘要： An antenna array comprises a surface comprising a replicated pattern of conductive tracks, the tracks defining a plurality of ports. A plurality of antennae are located at ports distributed about the surface. A plurality of radiative transceivers are electrically connected to a respective antenna. A plurality of reference transceivers are electrically connected to a non-radiative impedance located at a respective port so that each reference transceiver is surrounded by a group of antennae and electrically coupled to the group of antennae by the tracks. At least one antenna from at least one group of antennae belongs to one other group of antennae. Calibration circuitry includes a controller associated with each reference transceiver, each controller being arranged to transmit a calibration signal through an associated reference transceiver and to receive and store a received calibration signal from a selected transceiver for the group of antennae coupled to the reference transceiver. Each controller is further arranged to receive and store a calibration signal from the selected transceiver for the group of antennae coupled to the reference transceiver. The calibration circuitry further includes for each other transceiver for the group of antenna, circuitry for adjusting the phase and amplitude of signals transmitted and received by the radiative transceivers relative to the stored calibration signals for the selected radiative transceiver.
摘要翻译： 天线阵列包括包括导电轨道的复制图案的表面，轨道限定多个端口。 多个天线位于围绕表面分布的端口处。 多个辐射收发器电连接到相应的天线。 多个参考收发器电连接到位于相应端口处的非辐射阻抗，使得每个参考收发器被一组天线包围并由轨道电耦合到该组天线。 来自至少一组天线的至少一个天线属于另一组天线。 校准电路包括与每个参考收发器相关联的控制器，每个控制器被布置成通过相关联的参考收发器发送校准信号，并且从与所述参考收发器耦合的所述天线组的所选收发器接收和存储所接收的校准信号。 每个控制器还被布置成从所选择的收发器接收并存储耦合到参考收发器的天线组的校准信号。 校准电路还包括用于天线组的每个其他收发器，用于调整辐射收发器相对于所选择的辐射收发器所存储的校准信号发送和接收的信号的相位和幅度的电路。
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公开(公告)号：US20130278334A1
公开(公告)日：2013-10-24
申请号：US13591136
申请日：2012-08-21
IPC分类号： H03F1/56
CPC分类号： H03F3/3022 , H03F3/45192 , H03F3/45475 , H03F2203/45514 , H03F2203/45536
摘要： Embodiments of a capacitance sensing system including an integrating amplifier and methods for operating the same to provide a higher slew rate and bandwidth are described. In one embodiment, the integrating amplifier comprises an input stage including an inverting input coupled to an electrode of a capacitor to sense a capacitance and a non-inverting input coupled to a reference potential, and an output stage including a compensating capacitor coupled to an output. The compensating capacitor comprises two smaller capacitors coupled in parallel and a switching element configured to open when the integrating amplifier is operated in a RESET mode decoupling one of the two smaller capacitors from the output to decrease capacitance of the compensating capacitor.
摘要翻译： 描述了包括积分放大器的电容感测系统及其操作以提供更高转换速率和带宽的方法的实施例。 在一个实施例中，积分放大器包括输入级，该输入级包括耦合到电容器的电极的反相输入，用于感测耦合到参考电位的电容和非反相输入;以及输出级，包括耦合到输出的补偿电容 。 补偿电容器包括并联耦合的两个较小的电容器，以及开关元件，其被配置为当积分放大器在RESET模式下操作时断开，以从输出中去耦两个较小的电容器中的一个，以减小补偿电容器的电容。
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公开(公告)号：US07714776B2
公开(公告)日：2010-05-11
申请号：US12304711
申请日：2007-05-18
申请人： Timothy S. Cooper , Gerard Baldwin , Ronan Farrell
发明人： Timothy S. Cooper , Gerard Baldwin , Ronan Farrell
IPC分类号： G01S7/40
摘要： An antenna array comprises a surface comprising a replicated pattern of conductive tracks, the tracks defining a plurality of ports. A plurality of antennae are located at ports distributed about the surface. A plurality of radiative transceivers are electrically connected to a respective antenna. A plurality of reference transceivers are electrically connected to a non-radiative impedance located at a respective port so that each reference transceiver is surrounded by a group of antennae and electrically coupled to the group of antennae by the tracks. At least one antenna from at least one group of antennae belongs to one other group of antennae. Calibration circuitry includes a controller associated with each reference transceiver, each controller being arranged to transmit a calibration signal through an associated reference transceiver and to receive and store a received calibration signal from a selected transceiver for the group of antennae coupled to the reference transceiver. Each controller is further arranged to receive and store a calibration signal from the selected transceiver for the group of antennae coupled to the reference transceiver. The calibration circuitry further includes for each other transceiver for the group of antenna, circuitry for adjusting the phase and amplitude of signals transmitted and received by the radiative transceivers relative to the stored calibration signals for the selected radiative transceiver.
摘要翻译： 天线阵列包括包括导电轨道的复制图案的表面，轨道限定多个端口。 多个天线位于围绕表面分布的端口处。 多个辐射收发器电连接到相应的天线。 多个参考收发器电连接到位于相应端口处的非辐射阻抗，使得每个参考收发器被一组天线包围并由轨道电耦合到该组天线。 来自至少一组天线的至少一个天线属于另一组天线。 校准电路包括与每个参考收发器相关联的控制器，每个控制器被布置成通过相关联的参考收发器发送校准信号，并且从与所述参考收发器耦合的所述天线组的所选收发器接收和存储所接收的校准信号。 每个控制器还被布置成从所选择的收发器接收并存储耦合到参考收发器的天线组的校准信号。 校准电路还包括用于天线组的每个其他收发器，用于调整辐射收发器相对于所选择的辐射收发器所存储的校准信号发送和接收的信号的相位和幅度的电路。
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