公开(公告)号：US20140077823A1

公开(公告)日：2014-03-20

申请号：US13717780

申请日：2012-12-18

Applicant: STMICROELECTRONICS S.R.I. ,  STMICROELECTRONICS ASIA PACIFIC PTE. LTD.

Inventor： Paolo Angelini ,  Giovanni Carlo Tripoli ,  Ernesto Lasalandra ,  Tommaso Ungaretti ,  Kien Beng Tan ,  Yannick Guedon ,  Dianbo Guo ,  Sze-Kwang Tan

IPC: G01R27/26

CPC classification number: G01R27/2605 ,  G06F3/0418 ,  G06F3/044

Abstract: Capacitance sensing circuits and methods are provided. The capacitance sensing circuit includes a capacitance-to-voltage converter configured to receive a signal from a capacitance to be sensed and to provide an output signal representative of the capacitance, an output chopper configured to convert the output signal of the capacitance-to-voltage converter to a sensed voltage representative of the capacitance to be sensed, an analog accumulator configured to accumulate sensed voltages during an accumulation period of NA sensing cycles and to provide an accumulated analog value, an amplifier configured to amplify the accumulated analog value, and an analog-to-digital converter configured to convert the amplified accumulated analog value to a digital value representative of the capacitance to be sensed. The analog accumulator may include a low pass filter having a frequency response to filter wideband noise.

Abstract translation: 提供电容感测电路和方法。 电容感测电路包括：电容 - 电压转换器，被配置为从要感测的电容接收信号并提供表示电容的输出信号;输出斩波器，被配置为转换电容 - 电压的输出信号 转换器到感测的电压，代表要感测的电容;模拟累加器，被配置为在NA感测周期的累积周期期间累积感测电压并提供累加的模拟值，被配置为放大所累积的模拟值的放大器和模拟 配置为将放大的累积模拟值转换为表示要感测的电容的数字值。 模拟累加器可以包括具有对滤波器宽带噪声的频率响应的低通滤波器。

公开(公告)号：US20150308829A1

公开(公告)日：2015-10-29

申请号：US14332211

申请日：2014-07-15

Applicant: STMicroelectronics S.r.I.

Inventor： Carlo Caminada ,  Luciano Prandi ,  Ernesto Lasalandra

IPC: G01C19/5712

CPC classification number: G01C19/5712 ,  G01C19/5726 ,  G01C19/5762

Abstract: A microelectromechanical gyroscope that includes a first mass oscillatable according to a first axis; an inertial sensor, including a second mass, drawn along by the first mass and constrained so as to oscillate according to a second axis, in response to a rotation of the gyroscope; a driving device coupled to the first mass so as to form a feedback control loop and configured to maintain the first mass in oscillation at a resonance frequency; and an open-loop reading device coupled to the inertial sensor for detecting displacements of the second mass according to the second axis. The driving device includes a read signal generator for supplying to the inertial sensor at least one read signal having the form of a square-wave signal of amplitude that sinusoidally varies with the resonance frequency.

Abstract translation: 一种微机电陀螺仪，其包括可根据第一轴可振荡的第一质量; 包括第二质量的惯性传感器，其响应于所述陀螺仪的旋转而被所述第一质量拉伸并被约束以便根据第二轴线振荡; 耦合到所述第一质量块的驱动装置，以便形成反馈控制回路并且被配置为将所述第一质量块以共振频率保持在振荡状态; 以及耦合到所述惯性传感器的开环读取装置，用于根据所述第二轴检测所述第二质量块的位移。 驱动装置包括一个读信号发生器，用于向惯性传感器提供至少一个具有振幅方波信号的形式的读信号，正弦波信号随谐振频率正弦变化。

公开(公告)号：US20140078096A1

公开(公告)日：2014-03-20

申请号：US13717766

申请日：2012-12-18

Applicant: STMICROELECTRONICS S.R.I. ,  STMICROELECTRONICS ASIA PACIFIC PTE. LTD.

Inventor： Kien Beng Tan ,  Ernesto Lasalandra ,  Tommaso Ungaretti ,  Yannick Guedon ,  Dianbo Guo ,  Paolo Angelini ,  Giovanni Carlo Tripoli

IPC: G06F3/044

CPC classification number: G01R27/2605 ,  G06F3/0416 ,  G06F3/044 ,  G06F2203/04104

Abstract: Capacitance sensing circuits and methods are provided. A dual mode capacitance sensing circuit includes a capacitance-to-voltage converter having an amplifier and an integration capacitance coupled between an output and an inverting input of the amplifier, and a dual mode switching circuit responsive to mutual mode control signals for a controlling signal supplied from a capacitive touch matrix to the capacitance-to-voltage converter in a mutual capacitance sensing mode and responsive to self mode control signals for controlling signals supplied from the capacitive touch matrix to the capacitance-to-voltage converter in a self capacitance sensing mode, wherein the capacitance sensing circuit is configurable for operation in the mutual capacitance sensing mode or the self capacitance sensing mode.

Abstract translation: 提供电容感测电路和方法。 双模电容感测电路包括具有放大器和耦合在放大器的输出和反相输入端之间的积分电容器的电容 - 电压转换器，以及响应于所提供的控制信号的相互模式控制信号的双模式切换电路 在互电容感测模式中从电容式触摸矩阵到电容 - 电压转换器，并且响应用于在自电容感测模式下控制从电容式触摸矩阵提供给电容 - 电压转换器的信号的自发模式控制信号， 其中电容感测电路可配置为在互电容感测模式或自电容感测模式下操作。