Patents by Inventor Alessandro Bertolini

Alessandro Bertolini has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210226531
    Abstract: A switching converter includes a voltage conversion circuit providing an output voltage from an input voltage and a PWM voltage generated in response to first and second oscillating voltages. The input stage of a transconductor circuit provides an input reference current following a difference between a reference voltage and a voltage dependent on the output voltage and according to a transconductance, and an output stage for providing an output reference current from the input reference current. A phase shifter shifts an oscillating reference voltage according to the output reference current to obtain the first and second oscillating voltages. The transconductance is controlled in response to the input voltage resulting in a change of the input reference current. Compensation for that change is provided by subtracting a variable compensation current from the input reference current, where the variable compensation current is generated in response to the input voltage.
    Type: Application
    Filed: January 12, 2021
    Publication date: July 22, 2021
    Applicant: STMicroelectronics S.r.l.
    Inventors: Alessandro BERTOLINI, Alberto CATTANI, Alessandro GASPARINI
  • Patent number: 11057028
    Abstract: A DC-DC converter includes clock generation circuitry generating first and second clock signals that are out of phase, and a control signal generator generating a switching control signal at an edge of the second clock signal based upon a comparison of an error voltage to a summed voltage. Boost circuitry charges an energy storage component during an on-phase and discharges the energy storage component during an off-phase to thereby generate an output voltage. The on-phase and off-phase are set as a function of the switching control signal. Sum voltage generation circuitry generates a ramp voltage in response to an edge of the first clock signal and generates the summed voltage at an edge of the second clock signal. The sum voltage represents a sum of the ramp voltage and a voltage representative of the current flowing in the energy storage component during the on-phase.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: July 6, 2021
    Assignee: STMicroelectronics S.r.l.
    Inventors: Alessandro Bertolini, Alberto Cattani, Stefano Ramorini, Alessandro Gasparini
  • Publication number: 20210067148
    Abstract: A DC-DC converter includes clock generation circuitry generating first and second clock signals that are out of phase, and a control signal generator generating a switching control signal at an edge of the second clock signal based upon a comparison of an error voltage to a summed voltage. Boost circuitry charges an energy storage component during an on-phase and discharges the energy storage component during an off-phase to thereby generate an output voltage. The on-phase and off-phase are set as a function of the switching control signal. Sum voltage generation circuitry generates a ramp voltage in response to an edge of the first clock signal and generates the summed voltage at an edge of the second clock signal. The sum voltage represents a sum of the ramp voltage and a voltage representative of the current flowing in the energy storage component during the on-phase.
    Type: Application
    Filed: September 3, 2019
    Publication date: March 4, 2021
    Applicant: STMicroelectronics S.r.l.
    Inventors: Alessandro BERTOLINI, Alberto CATTANI, Stefano RAMORINI, Alessandro GASPARINI
  • Publication number: 20200369513
    Abstract: A MEMS sensor comprising preloaded suspension springs and a method for mechanically preloading suspension springs of a MEMS sensor are described. The MEMS sensor comprises a MEMS support structure; a plurality of suspension springs connected to said support structure; and, a proof mass flexibly suspended by said suspension springs; wherein at least one of said suspension springs is mechanically preloaded with a compressive force for reducing the natural frequency of said proof mass.
    Type: Application
    Filed: July 14, 2020
    Publication date: November 26, 2020
    Inventors: Eric HENNES, Alessandro BERTOLINI, Johannes Franciscus VAN DEN BRAND
  • Patent number: 10710870
    Abstract: A MEMS sensor comprising preloaded suspension springs and a method for mechanically preloading suspension springs of a MEMS sensor are described. The MEMS sensor comprises a MEMS support structure; a plurality of suspension springs connected to the support structure; and, a proof mass flexibly suspended by the suspension springs; wherein at least one of the suspension springs is mechanically preloaded with a compressive force for reducing the natural frequency of said proof mass.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: July 14, 2020
    Assignees: STICHTING VU-VUMC, FOM-NIKHEF
    Inventors: Eric Hennes, Alessandro Bertolini, Johannes Franciscus Van Den Brand
  • Patent number: 10680521
    Abstract: An inductor and a shunt switch circuit are connected in parallel between an input node and an intermediate node. A first power transistor is connected between the intermediate node and a ground node. A second power transistor is connected between the intermediate node and an output node. The first and second power transistors are driven in response to a pulse width modulation (PWM) drive cycle having an on-time and an off-time. The input node receives a DC input voltage and a DC output voltage is generated at the output node. A control circuit senses the input and output nodes and determines whether the DC input voltage is within a threshold voltage of the DC output voltage. In response to that determination, the shunt switch circuit is turned on only during the off-time of the PWM drive cycle.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: June 9, 2020
    Assignee: STMicroelectronics S.r.l.
    Inventors: Alessandro Bertolini, Alberto Cattani
  • Patent number: 10498316
    Abstract: An auto-tuned ramp generator and a method for generating a sawtooth signal are provided. In the method and apparatus, a sawtooth signal is compared to a first reference voltage and a second reference voltage. In response to determining that the sawtooth signal does not exceed the first reference voltage, the voltage level of the sawtooth signal is increased. In response to determining that the sawtooth signal exceeds the second reference voltage, the voltage level of the sawtooth signal is decreased. The voltage level the sawtooth signal is retained if the sawtooth signal remains between the first and second reference voltages.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: December 3, 2019
    Assignee: STMicroelectronics S.R.L.
    Inventors: Alberto Cattani, Alessandro Gasparini, Alessandro Bertolini
  • Publication number: 20190222204
    Abstract: An auto-tuned ramp generator and a method for generating a sawtooth signal are provided. In the method and apparatus, a sawtooth signal is compared to a first reference voltage and a second reference voltage. In response to determining that the sawtooth signal does not exceed the first reference voltage, the voltage level of the sawtooth signal is increased. In response to determining that the sawtooth signal exceeds the second reference voltage, the voltage level of the sawtooth signal is decreased. The voltage level the sawtooth signal is retained if the sawtooth signal remains between the first and second reference voltages.
    Type: Application
    Filed: January 17, 2018
    Publication date: July 18, 2019
    Inventors: Alberto CATTANI, Alessandro GASPARINI, Alessandro BERTOLINI
  • Publication number: 20170152135
    Abstract: A MEMS sensor comprising preloaded suspension springs and a method for mechanically preloading suspension springs of a MEMS sensor are described. The MEMS sensor comprises a MEMS support structure; a plurality of suspension springs connected to said support structure; and, a proof mass flexibly suspended by said suspension springs; wherein at least one of said suspension springs is mechanically preloaded with a compressive force for reducing the natural frequency of said proof mass.
    Type: Application
    Filed: December 6, 2016
    Publication date: June 1, 2017
    Inventors: Eric Hennes, Alessandro BERTOLINI, Johannes Franciscus VAN DEN BRAND
  • Patent number: 8661894
    Abstract: An apparatus and a method for measuring the gravitational acceleration on the ground, for example adapted to geophysical explorations applied to mining, including a base frame, a resonator having a first disc of sapphire integral to the base frame, and a second disc of sapphire arranged at a minimum distance from the first mass and aligned vertically with respect to the first mass such that the first and the second disc form a resonator for electromagnetic signals; a cantilever arm connected to the base frame and holding resiliently the second disc in order to provide a steady elastic modulus; a magnetic probe for applying an electromagnetic signal to the resonator arranged according to a plane existing between the two discs; a linear electric probe, arranged under the fixed disc aligned vertically with respect to its side edge, for measuring a resonance frequency of the resonator responsive to the electromagnetic signal, device for correlating the variation of the resonance frequency to a variation of distan
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: March 4, 2014
    Assignee: ENI S.p.A.
    Inventors: Nicolo Beverini, Francesco Fidecaro, Andrea De Michele, Francesco Mango, Alessandro Bertolini
  • Publication number: 20100071461
    Abstract: An apparatus and a method for measuring the gravitational acceleration on the ground, for example adapted to geophysical explorations applied to mining, comprising a base frame (31), a resonator (10) having a first disc of sapphire (2) integral to said base frame (31), an a second disc of sapphire (1) arranged at a minimum distance from said first mass (2) and aligned vertically with respect to said first mass (2) such that said first and said second disc (1 and 2) form a resonator for electromagnetic signals (10); a cantilever arm (41) connected to said base frame (31) and holding resiliently the second disc (1) in order to provide a steady elastic modulus; a magnetic probe (11) for applying an electromagnetic signal to said resonator (10) arranged according to a plane existing between the two discs (1 and 2); a linear electric probe (12), arranged under the fixed disc (2) aligned vertically with respect to its side edge, for measuring a resonance frequency of said resonator responsive to said electromagneti
    Type: Application
    Filed: March 28, 2008
    Publication date: March 25, 2010
    Applicant: ENI S.P.A.
    Inventors: Nicolo Beverini, Francesco Fidecaro, Andrea De Michele, Francesco Mango, Alessandro Bertolini