利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

36 条记录 (耗时 0.021 秒)

    Frequency compensation circuit and corresponding device
    21.
    发明授权
    Frequency compensation circuit and corresponding device 有权

    公开(公告)号：US11150678B2

    公开(公告)日：2021-10-19

    申请号：US16869084

    申请日：2020-05-07

    申请人： STMicroelectronics S.r.l.

    发明人： Germano Nicollini ,  Stefano Polesel

    IPC分类号： G05F3/26 ,  G05F1/59

    摘要： A current mirror includes first and second transistors having current paths coupled to an input current line. The current paths for the first and second transistors are referenced to ground via respective first and second resistors having resistance values twice a first resistance value. The first transistor is diode connected. A third transistor has a current path coupled to an output current line and referenced to ground via a third resistor having a second resistance value equal to the first resistance value divided by a mirror factor. Control terminals of the first and third transistors are coupled together, and further coupled to a control terminal of the second transistor through a coupling resistor. A first capacitor is coupled between ground and the control terminal of the second transistor unit. A second capacitor is coupled between ground and the current path through the third transistor.

    Bandgap reference circuit, corresponding device and method
    22.
    发明授权
    Bandgap reference circuit, corresponding device and method 有权

    公开(公告)号：US11099595B2

    公开(公告)日：2021-08-24

    申请号：US16950267

    申请日：2020-11-17

    申请人： STMicroelectronics S.r.l.

    发明人： Stefano Ramorini ,  Germano Nicollini

    IPC分类号： G05F3/30 ,  G05F3/26

    摘要： A bandgap circuit includes a supply node as well as a first and second bipolar transistors having jointly coupled base terminal at a bandgap node providing a bandgap voltage. First and second current generators are coupled to the supply node and supply mirrored first and second currents, respectively, to first and second circuit nodes. A third circuit node is coupled to the first bipolar transistor via a first resistor and coupled to ground via a second resistor, respectively. The third circuit node is also coupled to the second bipolar transistor so that the second resistor is traversed by a current which is the sum of the currents through the bipolar transistors. A decoupling stage intermediate the current generators and the bipolar transistors includes first and second cascode decoupling transistors having jointly coupled control terminals receiving a bias voltage sensitive to the bandgap voltage.

    Differential amplifier circuit for a capacitive acoustic transducer and corresponding capacitive acoustic transducer
    24.
    发明授权
    Differential amplifier circuit for a capacitive acoustic transducer and corresponding capacitive acoustic transducer 有权

    公开(公告)号：US10182292B2

    公开(公告)日：2019-01-15

    申请号：US15868480

    申请日：2018-01-11

    申请人： STMicroelectronics S.r.l.

    发明人： Germano Nicollini ,  Andrea Barbieri

    IPC分类号： H04R3/00 ,  H03F3/45 ,  H04R19/04 ,  H04R19/00 ,  H03F3/181 ,  H03F3/187 ,  B06B1/02 ,  H04R29/00

    摘要： An amplifier circuit, for a capacitive acoustic transducer defining a sensing capacitor that generates a sensing signal as a function of an acoustic signal, has a first input terminal and a second input terminal, which are coupled to the sensing capacitor and: a dummy capacitor, which has a capacitance corresponding to a capacitance at rest of the sensing capacitor and a first terminal connected to the first input terminal; a first amplifier, which is coupled at input to the second input terminal and defines a first differential output of the circuit; a second amplifier, which is coupled at input to a second terminal of the dummy capacitor and defines a second differential output of the circuit; and a feedback stage, which is coupled between the differential outputs and the first input terminal, for feeding back onto the first input terminal a feedback signal, which has an amplitude that is a function of the sensing signal and is in phase opposition with respect thereto.

    SENSING CIRCUIT AND METHOD OF DETECTING AN ELECTRICAL SIGNAL GENERATED BY A MICROPHONE
    29.
    发明申请
    SENSING CIRCUIT AND METHOD OF DETECTING AN ELECTRICAL SIGNAL GENERATED BY A MICROPHONE 有权
    感应电路及检测由麦克风产生的电子信号的方法

    公开(公告)号：US20160173994A1

    公开(公告)日：2016-06-16

    申请号：US14850714

    申请日：2015-09-10

    申请人： STMicroelectronics S.R.L.

    发明人： Germano Nicollini

    IPC分类号： H04R19/04

    CPC分类号： H04R19/04 ,  H04R1/04 ,  H04R19/005 ,  H04R2201/003

    摘要： A sensing circuit includes: a follower transistor, having a control terminal; a follower terminal for connection to a load; a bias-current generator, coupled to the follower terminal; and a feedback stage, configured to control the bias-current generator as a function of an input signal on the control terminal of the follower transistor.

    摘要翻译： 感测电路包括：跟随器晶体管，具有控制端; 用于连接到负载的从动端子; 耦合到从动端子的偏置电流发生器; 以及反馈级，被配置为根据随动晶体管的控制端上的输入信号来控制偏置电流发生器。