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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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公开(公告)号：US10862449B2
公开(公告)日：2020-12-08
申请号：US16171885
申请日：2018-10-26
Applicant: STMicroelectronics S.r.l.
Inventor： Carlo Valzasina , Gabriele Gattere , Alessandro Tocchio , Giacomo Langfelder
Abstract: A MEMS resonator system has a micromechanical resonant structure and an electronic processing circuit including a first resonant loop that excites a first vibrational mode of the structure and generates a first signal at a first resonance frequency. A compensation module compensates, as a function of a measurement of temperature variation, a first variation of the first resonance frequency caused by the temperature variation to generate a clock signal at a desired frequency that is stable relative to temperature. The electronic processing circuit further includes a second resonant loop, which excites a second vibrational mode of the structure and generates a second signal at a second resonance frequency. A temperature-sensing module receives the first and second signals and generates the measurement of temperature variation as a function of the first variation of the first resonance frequency and a second variation of the second resonance frequency caused by the temperature variation.
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公开(公告)号：US10591505B2
公开(公告)日：2020-03-17
申请号：US15280720
申请日：2016-09-29
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Alessandro Tocchio , Francesco Rizzini , Carlo Valzasina , Giacomo Langfelder
IPC: G01P1/00 , G01P15/125
Abstract: The accelerometric sensor has a suspended region, mobile with respect to a supporting structure, and a sensing assembly coupled to the suspended region and configured to detect a movement of the suspended region with respect to the supporting structure. The suspended region has a geometry variable between at least two configurations associated with respective centroids, different from each other. The suspended region is formed by a first region rotatably anchored to the supporting structure and by a second region coupled to the first region through elastic connection elements configured to allow a relative movement of the second region with respect to the first region. A driving assembly is coupled to the second region so as to control the relative movement of the latter with respect to the first region.
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公开(公告)号：US10812090B2
公开(公告)日：2020-10-20
申请号：US16681469
申请日：2019-11-12
Applicant: STMicroelectronics S.r.l.
Inventor： Giorgio Mussi , Giacomo Langfelder , Carlo Valzasina , Gabriele Gattere
Abstract: In an embodiment, a clock generator has a variable-modulus frequency divider that receives a high-frequency clock signal and outputs a divided clock signal having a frequency controlled by a modulus-control signal generated by a temperature-compensation circuit. A jitter filter is coupled to the output of the variable-modulus frequency divider and to the temperature-compensation circuit and generates a compensated clock signal having switching edges that are delayed, with respect to the divided clock signal, by a time correlated to a quantization-error signal.
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公开(公告)号：US20200169262A1
公开(公告)日：2020-05-28
申请号：US16681469
申请日：2019-11-12
Applicant: STMicroelectronics S.r.l.
Inventor： Giorgio Mussi , Giacomo Langfelder , Carlo Valzasina , Gabriele Gattere
Abstract: In an embodiment, a clock generator has a variable-modulus frequency divider that receives a high-frequency clock signal and outputs a divided clock signal having a frequency controlled by a modulus-control signal generated by a temperature-compensation circuit. A jitter filter is coupled to the output of the variable-modulus frequency divider and to the temperature-compensation circuit and generates a compensated clock signal having switching edges that are delayed, with respect to the divided clock signal, by a time correlated to a quantization-error signal.
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Patent Agency Ranking
公开(公告)号：US10267869B2
公开(公告)日：2019-04-23
申请号：US15638204
申请日：2017-06-29
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Giacomo Laghi , Giacomo Langfelder , Gabriele Gattere , Alessandro Tocchio , Dario Paci
IPC: G01R33/02 , G01R33/028 , G01R33/038
Abstract: A MEMS triaxial magnetic sensor device includes a sensing structure having: a substrate; an outer frame, which internally defines a window and is elastically coupled to first anchorages fixed with respect to the substrate by first elastic elements; a mobile structure arranged in the window, suspended above the substrate, which is elastically coupled to the outer frame by second elastic elements and carries a conductive path for flow of an electric current; and an elastic arrangement operatively coupled to the mobile structure. The mobile structure performs, due to the first and second elastic elements and the arrangement of elastic elements, first, second, and third sensing movements in response to Lorentz forces from first, second, and third magnetic-field components, respectively. The first, second, and third sensing movements are distinct and decoupled from one another.
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公开(公告)号：US10254355B2
公开(公告)日：2019-04-09
申请号：US15584672
申请日：2017-05-02
Applicant: STMicroelectronics S.r.l.
Inventor： Giacomo Langfelder , Alessandro Tocchio , Dario Paci
IPC: G01R33/028 , G01R33/02 , G01R33/00 , H01L41/08 , H01L41/113 , G01R33/038
Abstract: A magnetic field sensor includes a die and a current generator in the die. The current generator generates a driving current. A Lorentz force transducer is also formed in the die and coupled to the current generator to obtain measurements of a magnetic field based upon the Lorentz force. The magnetic field has a resonance frequency and the current generator drives the Lorentz force sensor with the driving current having a non-zero frequency different from the resonance frequency.
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8.发明申请公开(公告)号：US20170285061A1
公开(公告)日：2017-10-05
申请号：US15280720
申请日：2016-09-29
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Alessandro Tocchio , Francesco Rizzini , Carlo Valzasina , Giacomo Langfelder
IPC: G01P1/00 , G01P15/125
CPC classification number: G01P1/006 , G01P15/125 , G01P2015/0817 , G01P2015/0834
Abstract: The accelerometric sensor has a suspended region, mobile with respect to a supporting structure, and a sensing assembly coupled to the suspended region and configured to detect a movement of the suspended region with respect to the supporting structure. The suspended region has a geometry variable between at least two configurations associated with respective centroids, different from each other. The suspended region is formed by a first region rotatably anchored to the supporting structure and by a second region coupled to the first region through elastic connection elements configured to allow a relative movement of the second region with respect to the first region. A driving assembly is coupled to the second region so as to control the relative movement of the latter with respect to the first region.
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公开(公告)号：US09671471B2
公开(公告)日：2017-06-06
申请号：US14446248
申请日：2014-07-29
Applicant: STMicroelectronics S.r.l.
Inventor： Giacomo Langfelder , Alessandro Tocchio , Dario Paci
IPC: G01R33/028 , G01R33/038
CPC classification number: G01R33/0283 , G01R33/0064 , G01R33/0213 , G01R33/028 , G01R33/0286 , G01R33/038 , H01L41/08 , H01L41/1132
Abstract: A magnetic-field sensor, including: a die, a current generator in the die. The current generator generating a driving current. A Lorentz force transducer also in the die and being configured to obtain measurements of magnetic field based upon the Lorentz force is coupled to the current generator. The transducer having a resonance frequency. The current generator is such that the driving current has a non-zero frequency different from the resonance frequency.
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公开(公告)号：US10809280B2
公开(公告)日：2020-10-20
申请号：US16116467
申请日：2018-08-29
Applicant: STMicroelectronics S.r.l.
Inventor： Alessandro Tocchio , Francesco Rizzini , Carlo Valzasina , Giacomo Langfelder , Cristiano Rocco Marra
IPC: G01P15/125 , G01C19/5719 , G01P15/08 , G01P15/18 , G01P15/097
Abstract: An inertial sensor for sensing an external acceleration includes: a first and a second proof mass; a first and a second capacitor formed between first and second fixed electrodes and the first proof mass; a third and a fourth capacitor formed between third and fourth fixed electrodes and the second proof mass; a driving assembly configured to cause an antiphase oscillation of the first and second proof masses; a biasing circuit configured to bias the first and third capacitors, thus generating first variation of the oscillation frequency in a first time interval, and to bias the second and fourth capacitors, thus generating first variation of the oscillation frequency in a second time interval; a sensing assembly, configured to generate an differential output signal which is a function of a difference between a value of the oscillating frequency during the first time interval and a value of the oscillating frequency during the second time interval. Such differential output signal can be correlated to the value and direction of the external acceleration.
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