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公开(公告)号：US11841497B2
公开(公告)日：2023-12-12
申请号：US17109929
申请日：2020-12-02
Applicant: Politecnico Di Milano , STMicroelectronics S.r.l.
Inventor： Paolo Frigerio , Giacomo Langfelder , Luca Molinari , Giuseppe Maiocchi , Andrea Barbieri
CPC classification number: G02B26/0833 , G05B5/01 , G09G3/025 , H03G1/0005 , H04N9/3135
Abstract: Disclosed herein is a control system for a projection system, including a first subtractor receiving an input drive signal and a feedback signal and generating a first difference signal therefrom, the feedback signal being indicative of position of a quasi static micromirror of the projection system. A type-2 compensator receives the first difference signal and generates therefrom a first output signal. A derivative based controller receives the feedback signal and generates therefrom a second output signal. A second subtractor receives the first and second output signals and generates a second difference signal therefrom. The second difference signal serves to control a mirror driver of the projection system. A higher order resonance equalization circuit receives a pre-output signal from an analog front end of the projection system that is indicative of position of the quasi static micromirror, and generates the feedback signal therefrom.
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2.发明申请公开(公告)号：US20180139536A1
公开(公告)日：2018-05-17
申请号：US15868480
申请日：2018-01-11
Applicant: STMicroelectronics S.r.l.
Inventor： Germano Nicollini , Andrea Barbieri
CPC classification number: H04R3/007 , B06B1/0292 , H03F3/181 , H03F3/187 , H03F3/45076 , H03F3/45475 , H03F2200/03 , H03F2203/45112 , H03F2203/45116 , H04R3/00 , H04R19/005 , H04R19/04 , H04R29/004 , H04R2410/03 , H04R2499/11
Abstract: 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.
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公开(公告)号：US09634628B2
公开(公告)日：2017-04-25
申请号：US14960155
申请日：2015-12-04
Applicant: STMicroelectronics S.R.L.
Inventor： Germano Nicollini , Andrea Barbieri
CPC classification number: H04R3/007 , B06B1/0292 , H03F3/181 , H03F3/187 , H03F3/45076 , H03F3/45475 , H03F2200/03 , H03F2203/45112 , H03F2203/45116 , H04R3/00 , H04R19/005 , H04R19/04 , H04R29/004 , H04R2410/03 , H04R2499/11
Abstract: 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 buffer amplifier, which is coupled at input to the second input terminal and defines a first differential output of the circuit; a second buffer 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.
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4.发明申请DIFFERENTIAL AMPLIFIER CIRCUIT FOR A CAPACITIVE ACOUSTIC TRANSDUCER AND CORRESPONDING CAPACITIVE ACOUSTIC TRANSDUCER 有权用于电容式声学传感器和相应的电容式声学传感器的差分放大器电路公开(公告)号：US20160352294A1
公开(公告)日：2016-12-01
申请号：US14960155
申请日：2015-12-04
Applicant: STMicroelectronics S.R.L.
Inventor： Germano Nicollini , Andrea Barbieri
CPC classification number: H04R3/007 , B06B1/0292 , H03F3/181 , H03F3/187 , H03F3/45076 , H03F3/45475 , H03F2200/03 , H03F2203/45112 , H03F2203/45116 , H04R3/00 , H04R19/005 , H04R19/04 , H04R29/004 , H04R2410/03 , H04R2499/11
Abstract: 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 buffer amplifier, which is coupled at input to the second input terminal and defines a first differential output of the circuit; a second buffer 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.
Abstract translation: 一种放大器电路，用于定义感测电容器的电容式声学换能器，其产生作为声学信号的函数的感测信号，具有耦合到感测电容器的第一输入端子和第二输入端子，以及虚拟电容器， 其具有对应于感测电容器静止时的电容的电容器和连接到第一输入端子的第一端子; 第一缓冲放大器，其在输入端耦合到第二输入端子并且限定电路的第一差分输出; 第二缓冲放大器，其在输入端耦合到虚拟电容器的第二端子并且限定电路的第二差分输出; 以及反馈级，其耦合在差分输出和第一输入端之间，用于向第一输入端反馈反馈信号，该反馈信号具有作为感测信号的函数的幅度并且相对于其相位相反 。
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公开(公告)号：US11422044B2
公开(公告)日：2022-08-23
申请号：US16877746
申请日：2020-05-19
Applicant: STMicroelectronics S.r.l.
Inventor： Marco Zamprogno , Andrea Barbieri , Pasquale Flora , Raffaele Enrico Furceri
Abstract: A bridge driver circuit applies a bias voltage across first and second input nodes of a resistive bridge circuit configured to measure a physical property such as pressure or movement. A sensing circuit senses drive current, bias current and common mode current for the bridge driver and sums the sensed currents to generate a source current. The source current is processed to determine a normalized resistance and temperature of the resistive bridge circuit and from which a temperature dependent sensitivity of the resistive bridge circuit is determined. A voltage output at first and second output nodes of the resistive bridge circuit is processed to determine a value of the physical property. This processing further involves applying a temperature correction in response to the determined temperature dependent sensitivity.
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Patent Agency Ranking
公开(公告)号：US20180062588A1
公开(公告)日：2018-03-01
申请号：US15790518
申请日：2017-10-23
Applicant: STMicroelectronics S.r.l.
Inventor： Andrea Barbieri , Sergio Pernici
CPC classification number: H03F1/3211 , H03F3/45197 , H03F3/45273 , H03F3/45708 , H03F2200/261 , H03F2203/45044 , H03F2203/45101 , H03F2203/45116 , H03F2203/45136 , H03F2203/45151 , H03F2203/45156 , H03F2203/45361 , H03F2203/45492 , H03F2203/45506 , H04R3/00 , H04R19/005 , H04R19/04 , H04R2201/003
Abstract: A fully balanced differential difference amplifier includes a first differential input stage that receives an input voltage and a second differential input stage that receives a common-mode voltage. A first resistive-degeneration group is coupled to the first differential input and a second resistive-degeneration group is coupled to the second differential input. A differential output stage generates an output voltage. A first switch is coupled in parallel to the first resistive-degeneration group and a second switch is coupled in parallel with the second resistive-degeneration group. The first and second switches are driven into the closed state when the voltage input assumes a first value such that said first input stage operates in the linear region, and are driven into the open state when the voltage input assumes a second value, higher than the first value, such that the first input stage operates in a non-linear region.
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公开(公告)号：US20160156319A1
公开(公告)日：2016-06-02
申请号：US14863184
申请日：2015-09-23
Applicant: STMicroelectronics S.r.l.
Inventor： Andrea Barbieri , Sergio Pernici
CPC classification number: H03F1/3211 , H03F3/45197 , H03F3/45273 , H03F3/45708 , H03F2200/261 , H03F2203/45044 , H03F2203/45101 , H03F2203/45116 , H03F2203/45136 , H03F2203/45151 , H03F2203/45156 , H03F2203/45361 , H03F2203/45492 , H03F2203/45506 , H04R3/00 , H04R19/005 , H04R19/04 , H04R2201/003
Abstract: A FBDDA amplifier comprising: a first differential input stage, which receives an input voltage; a second differential input stage, which receives a common-mode voltage; a first resistive-degeneration group coupled to the first differential input; a second resistive-degeneration group coupled to the second differential input; a differential output stage, generating an output voltage; a first switch coupled in parallel to the first resistive-degeneration group; and a second switch coupled in parallel to the second resistive-degeneration group. The first and second switches are driven into the closed state when the voltage input assumes a first value such that said first input stage operates in the linear region, and are driven into the open state when the voltage input assumes a second value, higher than the first value, such that the first input stage operates in a non-linear region.
Abstract translation: 一种FBDDA放大器，包括：第一差分输入级，其接收输入电压; 第二差分输入级，其接收共模电压; 耦合到所述第一差分输入的第一电阻变性组; 耦合到所述第二差分输入的第二电阻变性组; 差分输出级，产生输出电压; 与第一电阻变性组并联耦合的第一开关; 以及与第二电阻变性组并联耦合的第二开关。 当电压输入为第一值时，第一和第二开关被驱动到关闭状态，使得所述第一输入级在线性区域中工作，并且当电压输入为第二值时被驱动到打开状态，高于 第一值，使得第一输入级在非线性区域中操作。
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公开(公告)号：US12015346B2
公开(公告)日：2024-06-18
申请号：US17565674
申请日：2021-12-30
Applicant: STMicroelectronics S.r.l.
Inventor： Andrea Barbieri , Aldo Vidoni , Marco Zamprogno
CPC classification number: H02M3/158 , H02M1/0025 , H02M1/08
Abstract: A DC-DC boost converter includes an inductor coupled between an input voltage and an input node, a diode coupled between the input node and an output node, and an output capacitor coupled between the output node and ground such that an output voltage is formed across the output capacitor. A switch selectively couples the input node to ground in response to a drive signal. Control loop circuitry includes an error amplifier to generate an analog error voltage based upon a comparison of a feedback voltage to a reference voltage, the feedback voltage being indicative of the output voltage, a quantizer to quantize the analog error voltage to produce a digital error signal, and a drive voltage generation circuit to generate the drive signal as having a duty cycle based upon the digital error signal.
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公开(公告)号：US20160173992A1
公开(公告)日：2016-06-16
申请号：US14858997
申请日：2015-09-18
Applicant: STMicroelectronics S.r.l.
Inventor： Germano Nicollini , Silvia Adorno , Andrea Barbieri , Federica Barbieri , Sebastiano Conti , Edoardo Marino , Sergio Pernici
CPC classification number: H04R19/005 , H04R19/02 , H04R19/04 , H04R2201/003 , H04R2499/11 , H04R2499/15
Abstract: A MEMS acoustic transducer has: a detection structure, which generates an electrical detection quantity as a function of a detected acoustic signal; and an electronic interface circuit, which is operatively coupled to the detection structure and generates an electrical output quantity as a function of the electrical detection quantity. The detection structure has a first micromechanical structure of a capacitive type and a second micromechanical structure of a capacitive type, each including a membrane that faces and is capacitively coupled to a rigid electrode and defines a respective first detection capacitor and second detection capacitor; the electronic interface circuit defines an electrical connection in series of the first detection capacitor and second detection capacitor between a biasing line and a reference line, and further has a first single-output amplifier and a second single-output amplifier, which are coupled to a respective one of the first detection capacitor and the second detection capacitor and have a respective first output terminal and second output terminal, between which the electrical output quantity is present.
Abstract translation: MEMS声换能器具有：检测结构，其产生作为检测到的声信号的函数的电检测量; 以及电子接口电路，其可操作地耦合到所述检测结构并且产生作为所述电检测量的函数的电输出量。 该检测结构具有电容型的第一微机械结构和电容式的第二微机械结构，每个微机械结构均包括面对电容耦合到刚性电极并且限定相应的第一检测电容器和第二检测电容器的膜; 电子接口电路在偏置线和参考线之间限定了第一检测电容器和第二检测电容器串联的电连接，并且还具有第一单输出放大器和第二单输出放大器，其耦合到 第一检测电容器和第二检测电容器中的一个，并且具有各自的第一输出端子和第二输出端子，其间存在电输出量。
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公开(公告)号：US12066621B2
公开(公告)日：2024-08-20
申请号：US17720506
申请日：2022-04-14
Applicant: STMicroelectronics S.r.l.
Inventor： Roberto Carminati , Nicolo' Boni , Andrea Barbieri , Marco Zamprogno , Luca Molinari
CPC classification number: G02B26/0858 , H02N2/028 , H02N2/062
Abstract: A MEMS device includes a semiconductor body with a cavity and forming an anchor portion, a tiltable structure elastically suspended over the cavity, first and second support arms to support the tiltable structure, and first and second piezoelectric actuation structures biasable to deform mechanically, generating a rotation of the tiltable structure around a rotation axis. The piezoelectric actuation structures carry first and second piezoelectric displacement sensors. When the tiltable structure rotates around the rotation axis, the displacement sensors are subject to respective mechanical deformations and generate respective sensing signals in phase opposition to each other, indicative of the rotation of the tiltable structure. The sensing signals are configured to be acquired in a differential manner.
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