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公开(公告)号：US20190199338A1
公开(公告)日：2019-06-27
申请号：US16221855
申请日：2018-12-17
Applicant: STMicroelectronics S.r.l.
Inventor： Marco ZAMPROGNO , Alireza TAJFAR
IPC: H03K17/041 , H03K17/687 , H03M1/06
CPC classification number: H03K17/04106 , G03B21/2033 , H03K17/08122 , H03K17/6871 , H03K19/08 , H03M1/06 , H03M1/66
Abstract: A circuit includes a first transistor and a second transistor having respective control terminals coupled to receive first and second bias voltages. A first electronic switch is coupled in series with, and between current paths of the first and second transistors to provide an output current line between a circuit output node and ground. A second electronic switch is selectively activated to a conductive state in order to provide a charge transfer current path between a bias node and a charge transfer node in the output current line. A third electronic switch is selectively activated to a conductive state in order to provide a charge transfer current path between the charge transfer node and the control terminal of the second transistor.
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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.
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公开(公告)号：US20210006034A1
公开(公告)日：2021-01-07
申请号：US17026495
申请日：2020-09-21
Applicant: STMicroelectronics S.r.l. , Politecnico Di Milano
Inventor： Marco ZAMPROGNO , Alireza TAJFAR
Abstract: A level-shifter includes an input node coupled to a laser driver input receiving a trigger signal, the input node receiving a signal indicating generation of a laser drive-pulse. A p-channel transistor has a source coupled to a supply node, a drain coupled to an output node, and a gate coupled to the input node. An n-channel transistor has a drain coupled to the drain of the p-channel transistor, a source coupled to ground, and a gate coupled to the input node. A first switch couples the input node to the output node. Another p-channel transistor has a source coupled to the supply node, a drain coupled to the output node by a second switch, and a gate coupled to the input node. The first switch closes and second switch opens when the signal is low, and the first switch opens and second switch closes when the signal is high.
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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.
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公开(公告)号：US20220302676A1
公开(公告)日：2022-09-22
申请号：US17833604
申请日：2022-06-06
Applicant: STMicroelectronics S.r.l.
Inventor： Marco ZAMPROGNO , Alireza TAJFAR
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.
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Patent Agency Ranking
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
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.
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公开(公告)号：US20220329042A1
公开(公告)日：2022-10-13
申请号：US17852100
申请日：2022-06-28
Applicant: STMicroelectronics S.r.l. , POLITECNICO DI MILANO
Inventor： Marco ZAMPROGNO , Alireza TAJFAR
Abstract: An input is coupled to a cathode of a laser diode having its anode coupled to a high-voltage-supply, with a cascoded current mirror having an input and output branches. The input branch is coupled between the high-voltage-supply and a sense resistor coupled to the input. The output branch is coupled between the high-voltage-supply and an output. A sense resistance is coupled between the output and ground, and includes a diode-coupled transistor coupled to the output and a resistor coupled between the diode-coupled transistor and ground. The input branch generates a current proportional to a voltage across the laser diode, and the output branch generates a mirrored current proportional to the current proportional to the voltage across the laser diode. A voltage proportional to the voltage across the laser diode is generated by the mirrored current flowing through the sense resistance. A comparison circuit compares this voltage to a threshold.
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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
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.
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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
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.
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公开(公告)号：US20200083877A1
公开(公告)日：2020-03-12
申请号：US16680831
申请日：2019-11-12
Applicant: STMicroelectronics S.r.l.
Inventor： Marco ZAMPROGNO , Alireza TAJFAR
IPC: H03K17/041 , H03M1/06 , H03K17/687 , H03K19/08 , H03K17/0812
Abstract: A circuit includes a first transistor and a second transistor having respective control terminals coupled to receive first and second bias voltages. A first electronic switch is coupled in series with, and between current paths of the first and second transistors to provide an output current line between a circuit output node and ground. A second electronic switch is selectively activated to a conductive state in order to provide a charge transfer current path between a bias node and a charge transfer node in the output current line. A third electronic switch is selectively activated to a conductive state in order to provide a charge transfer current path between the charge transfer node and the control terminal of the second transistor.
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