公开(公告)号：US20250007463A1

公开(公告)日：2025-01-02

申请号：US18751595

申请日：2024-06-24

Applicant: STMicroelectronics International N.V.

Inventor： Raffaele Enrico FURCERI ,  Marco ZAMPROGNO

IPC: H03D3/00 ,  H03D7/16

Abstract: Faults in a periodically oscillating MEMS mass are detected by processing a position signal, having an amplitude and oscillation frequency, generated as a function of mass position. First and second reference signals formed by samples of quadrature sinusoids at the oscillation frequency are generated. First and second multipliers generate a first product signal and a second product signal, respectively, via multiplication of the position signal by the first and second reference signals. The first and second product signals are low pass filtered to generate first and second filtered signals, respectively. An estimator circuit determines estimates of the amplitude as a function of the first and second filtered signals. A decision circuit detects the presence of faults on the basis of a comparison of the estimates with a range of values.

公开(公告)号：US20250167682A1

公开(公告)日：2025-05-22

申请号：US18944560

申请日：2024-11-12

Applicant: STMicroelectronics International N.V.

Inventor： Andrea BARBIERI ,  Raffaele Enrico FURCERI ,  Aldo VIDONI ,  Mattia BONINI

IPC: H02M3/158 ,  H02M1/00

Abstract: A DC-DC switching converter includes an electrical network with an inductor, switches and first and second capacitors subject to first and second voltages. A control module generates first and second control signals to control the switches with a sequence of switching periods implementing, for each switching period, a phase succession including: an inductor charge phase having a first duration as a function of the first control signal; a first inductor discharge phase towards the first capacitor having a second duration as a function of the second control signal; and a second inductor discharge phase towards the second capacitor. The control module couples to the electrical network to form a signal vector including signals indicative of the first and second voltages and the current. A gain stage generates the first and second control signals by multiplying the signal vector by a gain matrix for the control module forming a linear-quadratic regulator.