Patents by Inventor Sebastiano Messina

Sebastiano Messina 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).

  • Patent number: 12132413
    Abstract: A converter circuit converts an input signal applied across a first and a second input node into a converted output signal across a first and a second output node. The converter circuit includes a switching network coupled to the first input node via an inductor having a current flowing therethrough. In a hysteresis current control mode of the switching network, the current flowing through the inductor has a triangular waveform with rising and falling edges between a first current threshold and a second current threshold alternating with a switching frequency. The switching frequency is controlled by varying the distance between the first current threshold and the second current threshold.
    Type: Grant
    Filed: June 13, 2022
    Date of Patent: October 29, 2024
    Assignee: STMicroelectronics S.r.l.
    Inventors: Sebastiano Messina, Marco Torrisi
  • Patent number: 12068682
    Abstract: Uncompensated upper and lower reference-currents are generated for first and second branches of a high-frequency half-bridge within an interleaved-totem-pole PFC.
    Type: Grant
    Filed: July 25, 2022
    Date of Patent: August 20, 2024
    Assignee: STMicroelectronics S.r.l.
    Inventors: Sebastiano Messina, Marco Torrisi
  • Publication number: 20240030807
    Abstract: Uncompensated upper and lower reference-currents are generated for first and second branches of a high-frequency half-bridge within an interleaved-totem-pole PFC.
    Type: Application
    Filed: July 25, 2022
    Publication date: January 25, 2024
    Applicant: STMicroelectronics S.r.l.
    Inventors: Sebastiano MESSINA, Marco TORRISI
  • Patent number: 11677316
    Abstract: A variable duty cycle switching signal at a switching frequency is applied to a switching current regulation circuit arrangement energizing a current storage circuit assembly. Switching of the variable duty cycle switching signal is controlled by an upper and a lower threshold current level. The upper and lower threshold current levels vary with time following an average current value time variation. Additionally, frequency jitter is introduced in the variable duty cycle switching signal by: defining at least a frequency modulation window around a limit frequency identifying a limit value for an acceptable EMI; and applying an amplitude modulation of the upper and/or lower threshold current levels varying with time, wherein the amplitude modulation is applied in a time interval between times when the switching frequency enters and exit the frequency window.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: June 13, 2023
    Assignee: STMicroelectronics S.r.l.
    Inventors: Sebastiano Messina, Marco Torrisi
  • Publication number: 20220399829
    Abstract: A converter circuit converts an input signal applied across a first and a second input node into a converted output signal across a first and a second output node. The converter circuit includes a switching network coupled to the first input node via an inductor having a current flowing therethrough. In a hysteresis current control mode of the switching network, the current flowing through the inductor has a triangular waveform with rising and falling edges between a first current threshold and a second current threshold alternating with a switching frequency. The switching frequency is controlled by varying the distance between the first current threshold and the second current threshold.
    Type: Application
    Filed: June 13, 2022
    Publication date: December 15, 2022
    Applicant: STMicroelectronics S.r.l.
    Inventors: Sebastiano MESSINA, Marco TORRISI
  • Publication number: 20210313875
    Abstract: A variable duty cycle switching signal at a switching frequency is applied to a switching current regulation circuit arrangement energizing a current storage circuit assembly. Switching of the variable duty cycle switching signal is controlled by an upper and a lower threshold current level. The upper and lower threshold current levels vary with time following an average current value time variation. Additionally, frequency jitter is introduced in the variable duty cycle switching signal by: defining at least a frequency modulation window around a limit frequency identifying a limit value for an acceptable EMI; and applying an amplitude modulation of the upper and/or lower threshold current levels varying with time, wherein the amplitude modulation is applied in a time interval between times when the switching frequency enters and exit the frequency window.
    Type: Application
    Filed: March 31, 2021
    Publication date: October 7, 2021
    Applicant: STMicroelectronics S.r.l.
    Inventors: Sebastiano Messina, Marco Torrisi