Patents by Inventor Gianluca Ragonesi
Gianluca Ragonesi 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).
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Patent number: 8134388Abstract: A method controls a power MOS transistor having a control terminal and a load path, the load path connected in series with a load between voltage supply terminals, wherein a power supply voltage between the voltage supply terminals imposes a load voltage across the load and a load path voltage across the load path of the power MOS transistor. The method includes generating a control current for the control terminal during a switching process when the power MOS transistor changes switching states. The control current is dependent on the power supply voltage and on at least one of the group consisting of the load path voltage and the load voltage.Type: GrantFiled: August 17, 2006Date of Patent: March 13, 2012Assignee: Infineon Technologies AGInventors: Fabrizio Cortigiani, Franco Mignoli, Gianluca Ragonesi, Silvia Solda
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Patent number: 7944269Abstract: Embodiments of the invention are related to a power transistor and a method for controlling a power transistor. In one embodiment a power transistor comprises a power semiconductor body with a plurality of power transistor cells each having a control electrode and a current path. The power transistor furthermore comprises a temperature sensor formed by at least one transistor cell in the power semiconductor body whose control electrode is coupled to one electrode of the current path forming a reversed biased pn-junction.Type: GrantFiled: September 26, 2008Date of Patent: May 17, 2011Assignee: Infineon Technologies AGInventors: Fabrizio Cortigiani, Franco Mignoli, Gianluca Ragonesi, Silvia Solda
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Publication number: 20100148684Abstract: A device includes at least two circuit branches, each of said at least two circuit branches comprising at least one LED diode. The device comprises a supply circuit that provides an electric supply of said at least two circuit branches and includes a variable resistance. The device comprises a controller coupled to said at least two circuit branches and suitable for varying said resistance in reply to a variation of the current that flows in one of said at least two circuit branches to vary the electric supply of said at least two circuit branches.Type: ApplicationFiled: January 20, 2010Publication date: June 17, 2010Applicant: STMICROELECTRONICS S.R.L.Inventors: Gianluca Ragonesi, Patrizia Milazzo, Salvatore Musumeci, Giuseppe Platania
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Patent number: 7705543Abstract: A device includes at least two circuit branches, each of said at least two circuit branches comprising at least one LED diode. The device comprises a supply circuit that provides an electric supply of said at least two circuit branches and includes a variable resistance. The device comprises a controller coupled to said at least two circuit branches and suitable for varying said resistance in reply to a variation of the current that flows in one of said at least two circuit branches to vary the electric supply of said at least two circuit branches.Type: GrantFiled: February 9, 2006Date of Patent: April 27, 2010Assignee: STMicroelectronics S.r.l.Inventors: Gianluca Ragonesi, Patrizia Milazzo, Salvatore Musumeci, Giuseppe Platania
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Publication number: 20100079190Abstract: Embodiments of the invention are related to a power transistor and a method for controlling a power transistor. In one embodiment a power transistor comprises a power semiconductor body with a plurality of power transistor cells each having a control electrode and a current path. The power transistor furthermore comprises a temperature sensor formed by at least one transistor cell in the power semiconductor body whose control electrode is coupled to one electrode of the current path forming a reversed biased pn-junction.Type: ApplicationFiled: September 26, 2008Publication date: April 1, 2010Inventors: Fabrizio Cortigiani, Franco Mignoli, Gianluca Ragonesi, Silvia Solda
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Patent number: 7649364Abstract: A circuit includes a MOS transistor having a control electrode and a control capacitance, and including a control circuit for the MOS transistor. The control circuit includes an input to supply a control signal and an output to supply a drive signal, the output being connected to the control electrode of the MOS transistor. A calibration circuit is connected to the control electrode of the MOS transistor, and generates a calibration signal dependent on the capacitance value of the control capacitance. A drive circuit generates the drive signal with an amplitude dependent on the calibration signal as determined by the control signal.Type: GrantFiled: July 5, 2007Date of Patent: January 19, 2010Assignee: Infineon Technologies AGInventors: Fabrizio Cortigiani, Gianluca Ragonesi, Silvia Solda, Franco Mignoli
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Patent number: 7609237Abstract: A circuit apparatus with LED diodes includes a plurality of circuit branches in which each circuit branch comprises at least one LED diode. The apparatus comprises a device for the supply of said plurality of circuit branches and each circuit branch is connected singularly to the supply device. The supply device comprises a controller suitable for commanding the supply of each circuit branch of the plurality of circuit branches independently from the other circuit branches of the plurality.Type: GrantFiled: February 9, 2006Date of Patent: October 27, 2009Assignee: STMicroelectronics S.r.l.Inventors: Gianluca Ragonesi, Patrizia Milazzo, Salvatore Musumeci, Giuseppe Platania
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Publication number: 20080068059Abstract: A circuit includes a MOS transistor having a control electrode and a control capacitance, and including a control circuit for the MOS transistor. The control circuit includes an input to supply a control signal and an output to supply a drive signal, the output being connected to the control electrode of the MOS transistor. A calibration circuit is connected to the control electrode of the MOS transistor, and generates a calibration signal dependent on the capacitance value of the control capacitance. A drive circuit generates the drive signal with an amplitude dependent on the calibration signal as determined by the control signal.Type: ApplicationFiled: July 5, 2007Publication date: March 20, 2008Applicant: Infineon TechnologiesInventors: Fabrizio Cortigiani, Gianluca Ragonesi, Silvia Solda, Franco Mignoli
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Publication number: 20070040542Abstract: A method controls a power MOS transistor having a control terminal and a load path, the load path connected in series with a load between voltage supply terminals, wherein a power supply voltage between the voltage supply terminals imposes a load voltage across the load and a load path voltage across the load path of the power MOS transistor. The method includes generating a control current for the control terminal during a switching process when the power MOS transistor changes switching states. The control current is dependent on the power supply voltage and on at least one of the group consisting of the load path voltage and the load voltage.Type: ApplicationFiled: August 17, 2006Publication date: February 22, 2007Applicant: Infineon Technologies AGInventors: Fabrizio Cortigiani, Franco Mignoli, Gianluca Ragonesi, Silvia Solda
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Publication number: 20060192498Abstract: A circuit apparatus with LED diodes includes a plurality of circuit branches in which each circuit branch comprises at least one LED diode. The apparatus comprises a device for the supply of said plurality of circuit branches and each circuit branch is connected singularly to the supply device. The supply device comprises a controller suitable for commanding the supply of each circuit branch of the plurality of circuit branches independently from the other circuit branches of the plurality.Type: ApplicationFiled: February 9, 2006Publication date: August 31, 2006Applicant: STMicroelectronics S.r.l.Inventors: Gianluca Ragonesi, Patrizia Milazzo, Salvatore Musumeci, Giuseppe Platania
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Publication number: 20060186827Abstract: A device includes at least two circuit branches, each of said at least two circuit branches comprising at least one LED diode. The device comprises a supply circuit that provides an electric supply of said at least two circuit branches and includes a variable resistance. The device comprises a controller coupled to said at least two circuit branches and suitable for varying said resistance in reply to a variation of the current that flows in one of said at least two circuit branches to vary the electric supply of said at least two circuit branches.Type: ApplicationFiled: February 9, 2006Publication date: August 24, 2006Applicant: STMicroelectronics S.r.l.Inventors: Gianluca Ragonesi, Patrizia Milazzo, Salvatore Musumeci, Giuseppe Platania