公开(公告)号：US12149047B2

公开(公告)日：2024-11-19

申请号：US17833604

申请日：2022-06-06

Applicant: STMicroelectronics S.r.l.

Inventor： Marco Zamprogno ,  Alireza Tajfar

IPC: H01S5/042 ,  G02B26/08 ,  G02B26/10 ,  H01S5/062 ,  H03K5/26 ,  H05B45/30 ,  H05B45/325

Abstract: A pulsed signal generator generates a pulsed signal having a pulse width configured to be equal to a given fraction of a pulse width of a reference clock. A reference current source outputs current having a reference magnitude, and a comparison current source outputs current having a magnitude that is a function of the reference magnitude and the given fraction. A comparison circuit compares a total current output by one of the reference current source and the comparison current source during pulses of the reference clock to a total current output by the other of the reference current source and the comparison current source during pulses of the pulsed signal equal in number to the pulses of the reference clock in order to determine whether the pulse width of the pulse signal is less than or equal to the given fraction of the pulse width of the reference clock.

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

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

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.

公开(公告)号：US20200233009A1

公开(公告)日：2020-07-23

申请号：US16738459

申请日：2020-01-09

Applicant: STMicroelectronics S.r.l.

Inventor： Marco Zamprogno

IPC: G01P15/12 ,  H03M1/00

Abstract: A circuit configured to sense an input analog signal generated by a sensor at a first frequency and to generate an output digital signal indicative of the sensed input analog signal. The circuit includes a conditioning circuit, an ADC, a feedback circuit, and a low-pass filter. The conditioning circuit is configured to receive the input analog signal and to generate a conditioned analog signal. The ADC is configured to provide a converted digital signal based on the conditioned analog signal. The feedback circuit includes a band-pass filter configured to selectively detect a periodic signal at a second frequency higher than the first frequency and to act on the conditioning circuit to counter variations of the periodic signal at the second frequency. The low-pass filter is configured to filter out the periodic signal from the converted digital signal to generate the output digital signal.