公开(公告)号：US20230208294A1

公开(公告)日：2023-06-29

申请号：US17560977

申请日：2021-12-23

Applicant: STMicroelectronics S.r.l.

Inventor： Aldo VIDONI ,  Andrea BARBIERI ,  Franco CONSIGLIERI

IPC: H02M3/158 ,  G02B26/08

CPC classification number: H02M3/158 ,  G02B26/0833

Abstract: A DC-DC boost converter includes an inductor coupled between an input voltage and an input node, a first path coupled between the input node and a first output node at which a first output voltage is generated, and a second path coupled between the input node and a second output node at which a second output voltage is generated. The DC-DC boost converter operates in a first operating phase where the first path boosts the first output voltage and where the second path is kept from boosting the second output voltage by the second path being coupled to the first path, and operates in a second operating phase where the second path boosts the second output voltage and where the first path is kept from boosting the first output voltage by the second path not being coupled to the first path.

公开(公告)号：US20220171180A1

公开(公告)日：2022-06-02

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

IPC: G02B26/08 ,  B06B1/02

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.

公开(公告)号：US20230216405A1

公开(公告)日：2023-07-06

申请号：US17565674

申请日：2021-12-30

Applicant: STMicroelectronics S.r.l.

Inventor： Andrea BARBIERI ,  Aldo VIDONI ,  Marco ZAMPROGNO

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

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.

公开(公告)号：US20210364375A1

公开(公告)日：2021-11-25

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

IPC: G01L1/22 ,  G01D5/16 ,  G01B7/16

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 a bridge current that flows through the resistive bridge circuit in response to the applied bias voltage. A temperature dependent sensitivity of the resistive bridge circuit is determined by processing the sensed bridge current. 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.

公开(公告)号：US20220334378A1

公开(公告)日：2022-10-20

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

IPC: G02B26/08 ,  H02N2/02 ,  H02N2/06

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.