Detection circuit, corresponding device and method

    公开(公告)号:US11342885B2

    公开(公告)日:2022-05-24

    申请号:US16698060

    申请日:2019-11-27

    Abstract: In one example, a circuit includes a first node to receive an analog signal that is an amplitude modulated radio-frequency signal for a digital signal. An output node is configured to provide an output signal indicative of rising and falling edges of an envelope of the analog signal. The rising and falling edges are indicative of rising and falling edges of the digital signal. A first current path is disposed between a power supply node and the first node. The first current path includes a first transistor coupled between the first node and a first bias source. The first bias source is coupled between the first transistor and the power supply node. The output node is coupled to a first intermediate node in the first current path between the transistor and the first bias source. A control terminal of the first transistor is coupled to the output node via a feedback network.

    MEMS device with piezoelectric actuation, a projective MEMS system including the MEMS device and related driving method

    公开(公告)号:US10197795B2

    公开(公告)日:2019-02-05

    申请号:US15588204

    申请日:2017-05-05

    Abstract: A MEMS device includes a fixed supporting body forming a cavity, a mobile element suspended over the cavity, and an elastic element arranged between the fixed supporting body and the mobile element. First, second, third, and fourth piezoelectric elements are mechanically coupled to the elastic element, which has a shape symmetrical with respect to a direction. The first and second piezoelectric elements are arranged symmetrically with respect to the third and fourth piezoelectric elements, respectively. The first and fourth piezoelectric elements are configured to receive a first control signal, whereas the second and third piezoelectric elements are configured to receive a second control signal, which is in phase opposition with respect to the first control signal so that the first, second, third, and fourth piezoelectric elements deform the elastic element, with consequent rotation of the mobile element about the direction.

    MEMS DEVICE WITH PIEZOELECTRIC ACTUATION, A PROJECTIVE MEMS SYSTEM INCLUDING THE MEMS DEVICE AND RELATED DRIVING METHOD

    公开(公告)号:US20180149859A1

    公开(公告)日:2018-05-31

    申请号:US15588204

    申请日:2017-05-05

    Abstract: A MEMS device includes a fixed supporting body forming a cavity, a mobile element suspended over the cavity, and an elastic element arranged between the fixed supporting body and the mobile element. First, second, third, and fourth piezoelectric elements are mechanically coupled to the elastic element, which has a shape symmetrical with respect to a direction. The first and second piezoelectric elements are arranged symmetrically with respect to the third and fourth piezoelectric elements, respectively. The first and fourth piezoelectric elements are configured to receive a first control signal, whereas the second and third piezoelectric elements are configured to receive a second control signal, which is in phase opposition with respect to the first control signal so that the first, second, third, and fourth piezoelectric elements deform the elastic element, with consequent rotation of the mobile element about the direction.

    Energy harvesting system with selectively activatable harvesting interface, and method of energy harvesting
    4.
    发明授权
    Energy harvesting system with selectively activatable harvesting interface, and method of energy harvesting 有权
    能量收集系统具有选择性活动的收获界面和能量收集方法

    公开(公告)号:US09450434B2

    公开(公告)日:2016-09-20

    申请号:US14181270

    申请日:2014-02-14

    CPC classification number: H02J7/0052 H02J7/32 H02M1/36 H02M2001/0032 Y02B70/16

    Abstract: An energy-harvesting system includes a transducer to convert environmental energy into a harvesting electrical signal. A storage element stores electrical energy derived from conversion of the harvested environmental energy. A harvesting interface supplies an electrical charging signal to the storage element. The harvesting interface is selectively connected to the storage element in response to a control signal. The control signal causes the connection when the harvesting electrical signal exceeds a threshold. Conversely, the control signal causes the disconnection when the harvesting electrical signal is less than the threshold.

    Abstract translation: 能量收集系统包括将环境能量转换成收获电信号的换能器。 存储元件存储从收获的环境能量的转化得到的电能。 收割界面向存储元件提供充电信号。 响应于控制信号,收获界面选择性地连接到存储元件。 当采集电信号超过阈值时,控制信号导致连接。 相反,当采集电信号小于阈值时,控制信号导致断开。

    Magnetic inertial sensor and method for operating the same
    5.
    发明授权
    Magnetic inertial sensor and method for operating the same 有权
    磁惯性传感器及其操作方法

    公开(公告)号:US09322839B2

    公开(公告)日:2016-04-26

    申请号:US13854782

    申请日:2013-04-01

    Abstract: An inertial sensor having a body with an excitation coil and a first sensing coil extending along a first axis. A suspended mass includes a magnetic-field concentrator, in a position corresponding to the excitation coil, and configured for displacing by inertia in a plane along the first axis. A supply and sensing circuit is electrically coupled to the excitation coil and to the first sensing coil, and is configured for generating a time-variable flow of electric current that flows in the excitation coil so as to generate a magnetic field that interacts with the magnetic-field concentrator to induce a voltage/current in the sensing coil. The integrated circuit is configured for measuring a value of the voltage/current induced in the first sensing coil so as to detect a quantity associated to the displacement of the suspended mass along the first axis.

    Abstract translation: 惯性传感器,其具有带有激励线圈的主体和沿着第一轴线延伸的第一感测线圈。 悬挂质量体包括磁场集中器,位于对应于激励线圈的位置,并且构造成用于沿沿着第一轴线的平面中的惯性移位。 供电和感测电路电耦合到激励线圈和第一感测线圈,并且被配置为产生在励磁线圈中流动的时间流的电流,以便产生与磁场相互作用的磁场 感应线圈中的电压/电流。 集成电路被配置为测量在第一感测线圈中感应的电压/电流的值,以便检测与悬挂质量沿着第一轴的位移相关联的量。

    Programmable-gain amplifier, corresponding device and method

    公开(公告)号:US09853617B2

    公开(公告)日:2017-12-26

    申请号:US15168832

    申请日:2016-05-31

    Abstract: A programmable-gain amplifier includes: two complementary cross-coupled transistor pairs mutually coupled with each transistor in one pair having a current flow path cascaded with a current flow path of a respective one of the transistors in the other pair. First and second coupling points are formed between the pairs; with first and second sampling capacitors coupled thereto. First and second input stages have input terminals to input signals for sampling by the first and second sampling capacitors. Switching means couple the first and second input stages to the sampling capacitors so the input signals are sampled as sampled signals on the sampling capacitors. The switching means energizes the complementary cross-coupled transistor pairs so the signals sampled on the sampling capacitors undergo negative resistance regeneration growing exponentially over time to thereby provide an exponential amplifier gain.

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