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    Control circuit for an electronic converter, related integrated circuit, electronic converter and method
    21.
    发明授权
    Control circuit for an electronic converter, related integrated circuit, electronic converter and method 有权

    公开(公告)号：US12191869B2

    公开(公告)日：2025-01-07

    申请号：US17982712

    申请日：2022-11-08

    Applicant: STMicroelectronics S.r.l.

    Inventor： Alessandro Bertolini ,  Alberto Cattani ,  Alessandro Gasparini

    IPC: H03L7/099 ,  H02M1/00 ,  H02M3/158 ,  H03L7/07 ,  H03L7/081 ,  H03L7/091 ,  H03L7/10

    Abstract: In a control circuit for a switching stage of an electronic converter, a phase detector generates a drive signal in response to a phase difference between first and second clock signals. The first and second clock signals are generated by first and second current-controlled oscillators, respectively. An operational transconductance amplifier generates first and second control currents in response to a difference between a reference and a feedback of the electronic converter, with the first and second currents applied to control the first and second current-controlled oscillators. In response to a switching clock having a first state, a switching circuit applies first and second bias currents to the control inputs of the first and second current-controlled oscillators, respectively. Conversely, in response to the switching clock having a second state, the switching circuit applies the second and first bias currents to the control inputs of the first and second current-controlled oscillators, respectively.

    Half-bridge driver circuit with a switched capacitor supply voltage for high side drive signal generation
    22.
    发明授权
    Half-bridge driver circuit with a switched capacitor supply voltage for high side drive signal generation 有权

    公开(公告)号：US11323031B2

    公开(公告)日：2022-05-03

    申请号：US16924410

    申请日：2020-07-09

    Applicant: STMicroelectronics S.r.l.

    Inventor： Alberto Cattani ,  Alessandro Gasparini

    IPC: H02M3/158 ,  H02M1/08 ,  H02M1/00

    Abstract: First and second FETs of a half-bridge are series connected between first and second terminals and are gate driven, respectively, by first and second drivers. An inductance is connected to the intermediate node of the half-bridge. Power supply for the second driver circuit is a supply voltage generated by a voltage regulator as a function of the voltage between the first and the second terminal. Power supply for the first driver circuit is a supply voltage generated by a bootstrap capacitor having a first terminal connected via a first switch to receive the supply voltage output from the voltage regulator and a second terminal connected to the intermediate node. The first terminal of the bootstrap capacitor is further connected by a second switch to receive a second supply voltage. A control circuit generates control signals for the first and second driver circuits and the first and second switches.

    Circuit for controlling converters, corresponding converter device and method
    23.
    发明授权
    Circuit for controlling converters, corresponding converter device and method 有权

    公开(公告)号：US10897200B2

    公开(公告)日：2021-01-19

    申请号：US16406834

    申请日：2019-05-08

    Applicant: STMicroelectronics S.r.l.

    Inventor： Alberto Cattani ,  Stefano Ramorini ,  Alessandro Gasparini

    IPC: H02M3/158 ,  H02M3/156

    Abstract: A half-bridge converter is controlled by a circuit including a differential circuit receiving a reference signal and a feedback signal which is a function of an output signal from the converter. The half-bridge converter includes high-side and low-side electronic switches. A comparator generates a PWM-modulated signal for controlling the converter as a function of the duty cycle of the PWM-modulated signal in response to a signal at an intermediate node between the high-side and low-side electronic switches and an output of the differential circuit. A gain circuit block coupled between the intermediate node and the input of the comparator applies a ramp signal to the input of the comparator which is a function of the signal at the intermediate node. A variable gain is applied by the gain circuit block in order to keep a constant value for the duty cycle of said PWM-modulated signal irrespective of converter operation.

    DEVICE AND METHOD FOR CLOSED-LOOP CONTROL OF A POWER CONVERTER
    26.
    发明申请
    DEVICE AND METHOD FOR CLOSED-LOOP CONTROL OF A POWER CONVERTER 有权

    公开(公告)号：US20180034376A1

    公开(公告)日：2018-02-01

    申请号：US15394295

    申请日：2016-12-29

    Applicant: STMICROELECTRONICS S.R.L.

    Inventor： Alberto Cattani ,  Alessandro Gasparini ,  Stefano Ramorini

    IPC: H02M3/335

    CPC classification number: H02M3/33515 ,  H02M1/08 ,  H02M3/335 ,  H02M2001/0025

    Abstract: A control device for a switching power converter having an inductor element, a switch coupled to the inductor element, a storage element coupled to an output on which an output voltage is provided, and a diode element coupled to the storage element. The control device generates a command signal to control the switch and determine storage of energy in the inductor element in a first interval, and transfer of energy onto the storage element through the diode element in a second interval. A voltage shifter module generates a feedback voltage shifted relative to the output voltage. An amplification module has a first input receiving the feedback voltage, a second input receiving the reference voltage, and an output that supplies, as a function of the difference between the feedback and reference voltages, a control signal. A control unit receives the control signal and generates the command signal to control the switch.

    Energy harvesting interface with improved impedance matching, method for operating the energy harvesting interface, and energy harvesting system using the energy harvesting interface
    27.
    发明授权
    Energy harvesting interface with improved impedance matching, method for operating the energy harvesting interface, and energy harvesting system using the energy harvesting interface 有权
    具有改进的阻抗匹配的能量收集界面，用于操作能量收集界面的方法以及使用能量收集界面的能量收集系统

    公开(公告)号：US09541941B2

    公开(公告)日：2017-01-10

    申请号：US14616119

    申请日：2015-02-06

    Applicant: STMicroelectronics S.r.l.

    Inventor： Stefano Ramorini ,  Alessandro Gasparini ,  Alberto Cattani ,  Federica Papotti

    IPC: G05F5/00

    CPC classification number: G05F5/00 ,  H02J50/00 ,  H02J50/10 ,  H02J50/15 ,  H02M7/219

    Abstract: An energy harvesting interface receives an electrical signal from an inductive transducer and supplies a supply signal. The interface includes an input branch with a first switch and a second switch connected together in series between a first input terminal and an output terminal. The interface further includes a third switch and a fourth switch connected together in series between a second input terminal and the output terminal. A first electrical-signal-detecting device, coupled across the second switch, detects a first threshold value of an electric storage current in the inductor of the transducer. A second electrical-signal-detecting device, coupled across the fourth switch, detects whether the electric supply current that flows through the fourth switch reaches a second threshold value lower than the first threshold value. The second threshold is derived from the electric storage current.

    Abstract translation: 能量采集接口从感应传感器接收电信号并提供电源信号。 接口包括具有第一开关和第二开关的输入分支，第一开关和第二开关串联连接在第一输入端子和输出端子之间。 该接口还包括串联连接在第二输入端和输出端之间的第三开关和第四开关。 耦合在第二开关上的第一电信号检测装置检测换能器的电感器中的蓄电电流的第一阈值。 耦合在第四开关上的第二电信号检测装置检测流经第四开关的电源电流是否达到低于第一阈值的第二阈值。 第二阈值来自蓄电流。

    MEMS speaker device with an electronic test circuit
    29.
    发明授权
    MEMS speaker device with an electronic test circuit 有权
    具有电子测试电路的MEMS扬声器装置

    公开(公告)号：US09426563B2

    公开(公告)日：2016-08-23

    申请号：US14030584

    申请日：2013-09-18

    Applicant: STMicroelectronics S.r.l.

    Inventor： Alessandro Gasparini ,  Daniele Depascalis

    IPC: H04R3/00 ,  H04R19/01 ,  H04R29/00

    CPC classification number: H04R3/00 ,  H04R19/013 ,  H04R29/001

    Abstract: A MEMS speaker device including a membrane that forms a first capacitor and a second capacitor, respectively, with a top plate and with a bottom plate. The device includes a driving circuit that operates, during a first operating period, to move the membrane into a first position, in which the membrane is close to the bottom plate, and during a second operating period, to move the membrane into a second position, in which the membrane is close to the top plate. The device includes a testing circuit having a measuring circuit, which generates a first signal, based on a capacitance of one of the first capacitor and the second capacitor and a second signal based on a capacitance of one of the first capacitor and the second capacitor; and a comparator, which compares the first and second signals with at least one first electrical reference quantity.

    Abstract translation: 一种MEMS扬声器装置，包括分别与顶板和底板形成第一电容器和第二电容器的膜。 该装置包括驱动电路，该驱动电路在第一操作期间操作以将膜移动到第一位置，其中膜靠近底板，并且在第二操作期间，将膜移动到第二位置 ，其中膜接近顶板。 该装置包括具有测量电路的测试电路，其基于第一电容器和第二电容器之一的电容产生第一信号，基于第一电容器和第二电容器之一的电容产生第二信号; 以及比较器，其将第一和第二信号与至少一个第一电参考量进行比较。

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