-
公开(公告)号：US20240049604A1
公开(公告)日：2024-02-08
申请号：US18222180
申请日：2023-07-14
Applicant: STMicroelectronics S.r.l. , Politecnico Di Milano
Inventor： Marco ZAMPROGNO , Raffaele Enrico FURCERI , Matteo GIANOLLO , Giacomo LANGFELDER
CPC classification number: H10N30/802 , H02M3/158 , H02J7/0068 , H02N2/06
Abstract: A differential piezoelectric actuator-system includes an inductor and driver-circuit having switches for transferring energy between first and second actuators and the inductor, and between a voltage-supply node and the inductor. Control circuitry determines whether a next phase in which to operate the driver-circuit is a first charging-phase or a first recovery-phase. The first charging-phase includes operating the switches in: a first sub-phase to transfer energy from the first actuator to the inductor; a second sub-phase to transfer energy from the voltage supply node to the inductor; and a third sub-phase to transfer energy from the inductor to the second actuator. The first recovery-phase includes operating the switches in: a first sub-phase to transfer energy from the first actuator to the inductor; a second sub-phase to transfer energy from the inductor to the voltage supply node; and a third sub-phase to transfer energy from the inductor to the second actuator.
-
公开(公告)号：US20240093995A1
公开(公告)日：2024-03-21
申请号：US17933743
申请日：2022-09-20
Applicant: STMICROELECTRONICS S.r.l. , POLITECNICO DI MILANO
Inventor： Carlo VALZASINA , Giacomo LANGFELDER , Marco BESTETTI , Andrea Giovanni BONFANTI
IPC: G01C19/5712 , H03F3/45
CPC classification number: G01C19/5712 , H03F3/45475
Abstract: The present disclosure is directed to a dual-mode control circuit for a microelectromechanical system (MEMS) gyroscope. A control circuit is coupled to a Lissajous frequency modulated (LFM) gyroscope to control amplitude of oscillation of a mass along two directions. The amplitude of oscillation is controlled by an automatic gain control (AGC) loop which allows the same amplitude of oscillation in both directions. An AGC is implemented with a combination of proportional control (P-type) and integral control (I-type) paths that maintain the correct Lissajous pattern of the oscillation of the mass. The AGC may include a dual-mode stage which is able to switch between a P-type control path and an I-type control path based on the operation of the LFM gyroscope. A fast start-up phase may be controlled by the P-type control path while the I-type path is pre-charged to be ready to use in a steady state condition.
-
公开(公告)号：US20240049603A1
公开(公告)日：2024-02-08
申请号：US17879066
申请日：2022-08-02
Applicant: STMicroelectronics S.r.l. , Politecnico Di Milano
Inventor： Marco ZAMPROGNO , Raffaele Enrico FURCERI , Matteo GIANOLLO , Giacomo LANGFELDER
CPC classification number: H01L41/042 , H02N2/06 , H02M3/158
Abstract: A differential piezoelectric actuator-system includes an inductor and driver-circuit having switches for transferring energy between first and second actuators and the inductor, and between a voltage-supply node and the inductor. Control circuitry determines whether a next phase in which to operate the driver-circuit is a first charging-phase or a first recovery-phase. The first charging-phase includes operating the switches in: a first sub-phase to transfer energy from the first actuator to the inductor; a second sub-phase to transfer energy from the voltage supply node to the inductor; and a third sub-phase to transfer energy from the inductor to the second actuator. The first recovery-phase includes operating the switches in: a first sub-phase to transfer energy from the first actuator to the inductor; a second sub-phase to transfer energy from the inductor to the second actuator; and a third sub-phase to transfer energy from the inductor to the voltage supply node.
-
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
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：US20230400303A1
公开(公告)日：2023-12-14
申请号：US17806611
申请日：2022-06-13
Inventor： Giacomo LANGFELDER , Marco GADOLA
Abstract: The invention relates to an inertial sensor (1) comprising a substrate extending along a drive excitation direction (x) and a detection direction (y) normal to each other, the device plane being perpendicular to a rotation direction (z), a first drive frame (110) and a second drive frame (120), a first sense frame (210), a second sense frame (220), a sense lever (1000) pivotably mounted around a rotation axis (1001), a sensing system comprising a strain gauge (1600) mechanically stressed by the sense lever it is rotating around the rotation axis. The sense lever includes a central portion (1500), a first arm (1100) and a second arm (1200), the central portion having a dimension along the detection direction called central width, the arms having a dimension along the detection direction called arm width, the central width being at least twice greater than the arm width.
-
Patent Agency Ranking
6.发明公开公开(公告)号：US20240191994A1
公开(公告)日：2024-06-13
申请号：US18530792
申请日：2023-12-06
Inventor： Andrea BUFFOLI , Giacomo LANGFELDER , Valentina ZEGA , Thierry VERDOT
IPC: G01C19/574
CPC classification number: G01C19/574
Abstract: An inertial sensor including a substrate, sense frames, drive frames configured to put into motion the sense frames, and a sense lever pivotably mounted around a rotation axis. The sense frames, drive frames and sense lever are connected to each other in such a way that when the inertial sensor is subjected to a rotational movement around the rotation axis, the first sense frame, the second sense frame and the sense lever respectively feature a first tilt θ1 a second tilt θ2 and a lever tilt θs relatively to the device plane, and both θ1/θs and θ2/θs are lower than 0.1. The inertial sensor features strain gauges that get stressed when the lever rotates due to the motion of the sense frames.
-
7.发明申请公开(公告)号：US20170059420A1
公开(公告)日：2017-03-02
申请号：US15248756
申请日：2016-08-26
Inventor： Patrice REY , Guillaume JOURDAN , Philippe ROBERT , Giacomo LANGFELDER , Antonio F. LONGONI , Stefano DELLEA
IPC: G01L1/18 , G01C19/5607 , G01P15/12
CPC classification number: G01L1/183 , G01C19/5607 , G01C19/5755 , G01P15/123 , G01P2015/0814 , G01P2015/0817 , G01P2015/0857
Abstract: Piezoresistive detection resonant device comprising a substrate, a mobile par configured to move with respect the substrate, suspension elements suspending the mobile part to the substrate, a piezoresistive detection device to detect the motions of the mobile part, said piezoresistive detection device comprising at least one strain gauge, wherein the piezoresistive detection resonant device also comprises a folded spring with at least two spring arms, connected to the mobile part and configured to be deformed by the motion of the mobile part, the at least one gauge being suspended between the substrate and the folded spring in such manner that the deformation of the gauge is reduced compared to the motion of the mobile part.
Abstract translation: 压阻检测共振装置，包括基板，被配置为相对于基板移动的移动配件，将移动部件悬置于基板的悬架元件，压阻检测装置，用于检测移动部件的运动，所述压阻检测装置包括至少一个 应变计，其中所述压阻检测谐振装置还包括具有至少两个弹簧臂的折叠弹簧，所述弹簧臂连接到所述可移动部件并且被配置为通过所述可移动部件的运动而变形，所述至少一个量规悬挂在所述基板和 折叠的弹簧以与移动部件的运动相比减小量规的变形的方式。
-
8.发明公开公开(公告)号：US20240154582A1
公开(公告)日：2024-05-09
申请号：US18388168
申请日：2023-11-08
Inventor： Giacomo LANGFELDER , Andrea BUFFOLI , Marco GADOLA
IPC: H03F3/16 , G01C19/5712
CPC classification number: H03F3/16 , G01C19/5712 , H03F2200/261
Abstract: A monolithically-integrated current-feedback instrumentation amplifier includes two differential pairs of transistors. A drain terminal of transistor is directly connected to a drain terminal of transistor and to a differential voltage amplifier, and is connected to a ground terminal by means of a first sink resistor. A drain terminal of transistor is directly connected to a drain terminal of transistor and to the differential voltage amplifier, and is connected to a ground terminal by means of a second sink resistor. An output terminal of the differential voltage amplifier is connected to a resistive voltage divider. Source terminals of the transistors are directly connected together and to a first bias current source without a degeneration resistor, and source terminals of the transistors are directly connected together and to a second bias current source without a degeneration resistor. A sensing system comprising a piezoresistive N&MEMS sensor and a monolithically-integrated differential readout circuit comprising the amplifier are also provided.
-
公开(公告)号：US20230236013A1
公开(公告)日：2023-07-27
申请号：US18156639
申请日：2023-01-19
Inventor： Giacomo LANGFELDER , Marco GADOLA
IPC: G01C19/5705
CPC classification number: G01C19/5705
Abstract: An inertial sensor including a substrate, a first pair of proof masses sensitive to rotation movements occurring around a first direction and a third direction, a second pair of proof masses sensitive to rotation movements occurring around a second direction and the third direction, an excitation device, four frames, a rotatable frame and a sensing system connected to the rotatable frame. This inertial sensor is characterized in that the excitation device is configured to force the first pair of proof masses and the second pair of proof masses into a motion going towards and away from the sensing system, and wherein the readout of the rotation movements occurring in each of the three directions is achieved with piezoelectric gauges.
-
公开(公告)号：US20190195964A1
公开(公告)日：2019-06-27
申请号：US16290778
申请日：2019-03-01
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Giacomo LAGHI , Giacomo LANGFELDER , Gabriele GATTERE , Alessandro TOCCHIO , Dario PACI
IPC: G01R33/02 , G01R33/00 , 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.
-
-
-
-
-
-
-
-
-
Search Results
11
records
(took 0.017 seconds)
