Patents by Inventor Cristian Garbossa

Cristian Garbossa 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: 20200363457
    Abstract: A circuit for detecting failure of a device includes a plurality of monitoring modules. Each respective monitoring module of the plurality of monitoring modules is configured to generate a monitoring value at an output of the respective monitoring module based on a signal received at an input of the respective monitoring module. The circuit further includes a data selector module configured to couple, for each step of a switching cycle, the input of each of the plurality of monitoring modules to one of a plurality of function modules such that each of the plurality of monitoring modules generates the monitoring value for each of the plurality of function modules to generate monitoring information and evaluation logic configured to determine whether a failure has occurred at the plurality of function modules based on the monitoring information.
    Type: Application
    Filed: May 15, 2019
    Publication date: November 19, 2020
    Inventors: Cristian Garbossa, Marco Piselli
  • Patent number: 10784780
    Abstract: A controller circuit for generating a Pulse-Width Modulation (PWM) signal for activating a switching device of a Switched-Mode Power Supply (SMPS) includes gap detection circuitry, Pulse Frequency Modulated (PFM) circuitry, PWM circuitry and logic circuitry. The gap detection circuitry is configured to generate a shift signal based on an indication of a voltage difference between a reference voltage and a feedback voltage corresponding to voltage output by the SMPS. The PFM circuitry is configured to generate a hold signal indicating a target PFM frequency for the PWM signal. The PWM circuitry is configured to shift, based on the shift signal, a pedestal current to generate a shifted pedestal current and to generate, based on the shifted pedestal current, a peak signal indicating a target PWM on time for the PWM signal.
    Type: Grant
    Filed: October 4, 2019
    Date of Patent: September 22, 2020
    Assignee: Infineon Technologies AG
    Inventors: Luca Scandola, Stefano Orlandi, Cristian Garbossa
  • Patent number: 10734798
    Abstract: A circuit includes a first regulation module, second regulation module, first monitoring module, and second monitoring module. The first regulation module is configured to generate, from a supply voltage, a first voltage. The second regulation module is configured to generate, from a first voltage, a second voltage that is less than the first voltage. The first monitoring module is configured to generate a first warning signal when the first voltage exceeds a first threshold and to generate the first warning signal when a first testing voltage exceeds the first threshold. The second monitoring module is configured to generate a second warning signal when the second voltage exceeds a second threshold and to generate the second warning signal when a second testing voltage exceeds the second threshold.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: August 4, 2020
    Assignee: Infineon Technologies AG
    Inventors: Cristian Garbossa, Bernhard Wotruba
  • Publication number: 20200195127
    Abstract: A method of operating a power protection system coupled between a power source and a power converter includes producing, by a controller of the power protection system, a driving signal to a cut-off switch of the power protection system to electrically couple the power source to the power converter; detecting, by the controller of the power protection system, a fault condition of the power converter while the power converter is in operation, where the detecting includes detecting, by the controller of the power protection system, that a current flowing through the cut-off switch is above a pre-determined threshold while a gate control signal from the power converter indicates an OFF state for a first current path of the power converter; and in response to detecting the fault condition, turning off, by the controller of the power protection system, the cut-off switch to isolate the power source from the power converter.
    Type: Application
    Filed: December 14, 2018
    Publication date: June 18, 2020
    Inventors: Cristian Garbossa, Enrico Orietti
  • Patent number: 10666142
    Abstract: In accordance with one embodiment, a switching converter includes a switching circuit configured to receive a switching signal and to alternatingly connect an output node of the switching circuit with a supply node and a reference node in accordance with the switching signal. An input voltage is operably applied between the supply node and the reference node. The switching converter further includes an inductor coupled between the output node of the switching circuit and an output node of the switching converter as well as an oscillator configured to generate a clock signal with an oscillator frequency depending on the input voltage. A switching controller is configured to receive the clock signal and to generate the switching signal using pulse-width modulation (PWM), wherein the frequency of the switching signal is set in accordance with the oscillator frequency and a duty cycle of the switching signal is deter-mined using current-mode control.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: May 26, 2020
    Assignee: Infineon Technologies AG
    Inventors: Marco Vanin, Cristian Garbossa, Stefano Orlandi, Winand Van Sloten
  • Publication number: 20190356126
    Abstract: A circuit includes a first regulation module, second regulation module, first monitoring module, and second monitoring module. The first regulation module is configured to generate, from a supply voltage, a first voltage. The second regulation module is configured to generate, from a first voltage, a second voltage that is less than the first voltage. The first monitoring module is configured to generate a first warning signal when the first voltage exceeds a first threshold and to generate the first warning signal when a first testing voltage exceeds the first threshold. The second monitoring module is configured to generate a second warning signal when the second voltage exceeds a second threshold and to generate the second warning signal when a second testing voltage exceeds the second threshold.
    Type: Application
    Filed: May 18, 2018
    Publication date: November 21, 2019
    Inventors: Cristian Garbossa, Bernhard Wotruba
  • Patent number: 10338620
    Abstract: In some examples, a device includes an amplifier circuit configured to receive a reference voltage signal at a first input, receive a feedback signal at a second input, and generate an output signal based on the reference voltage signal and the feedback signal. In some examples, the device also includes a feedback circuit including a soft-shaper circuit that is electrically connected to the second input of the amplifier circuit. In some examples, the feedback circuit is configured to sense a voltage step in the reference voltage signal, generate a voltage step across the soft-shaper circuit approximately equal to the voltage step in the reference voltage signal in response to sensing the voltage step in the reference voltage signal, and ramp a voltage level across the soft-shaper circuit to zero after generating the voltage step across the soft-shaper circuit.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: July 2, 2019
    Assignee: Infineon Technologies AG
    Inventors: Fabio Ballarin, Cristian Garbossa, Marco Piselli
  • Publication number: 20190157975
    Abstract: In accordance with one embodiment, a switching converter includes a switching circuit configured to receive a switching signal and to alternatingly connect an output node of the switching circuit with a supply node and a reference node in accordance with the switching signal. An input voltage is operably applied between the supply node and the reference node. The switching converter further includes an inductor coupled between the output node of the switching circuit and an output node of the switching converter as well as an oscillator configured to generate a clock signal with an oscillator frequency depending on the input voltage. A switching controller is configured to receive the clock signal and to generate the switching signal using pulse-width modulation (PWM), wherein the frequency of the switching signal is set in accordance with the oscillator frequency and a duty cycle of the switching signal is deter-mined using current-mode control.
    Type: Application
    Filed: November 15, 2018
    Publication date: May 23, 2019
    Inventors: Marco Vanin, Cristian Garbossa, Stefano Orlandi, Winand Van Sloten
  • Publication number: 20190146532
    Abstract: In some examples, a device includes an amplifier circuit configured to receive a reference voltage signal at a first input, receive a feedback signal at a second input, and generate an output signal based on the reference voltage signal and the feedback signal. In some examples, the device also includes a feedback circuit including a soft-shaper circuit that is electrically connected to the second input of the amplifier circuit. In some examples, the feedback circuit is configured to sense a voltage step in the reference voltage signal, generate a voltage step across the soft-shaper circuit approximately equal to the voltage step in the reference voltage signal in response to sensing the voltage step in the reference voltage signal, and ramp a voltage level across the soft-shaper circuit to zero after generating the voltage step across the soft-shaper circuit.
    Type: Application
    Filed: November 15, 2017
    Publication date: May 16, 2019
    Inventors: Fabio Ballarin, Cristian Garbossa, Marco Piselli
  • Patent number: 10277111
    Abstract: According to an example, a step down converter includes switching circuit configured to control a switching output in order to generate an output voltage on a converter output within a specified range of a target voltage. The step down converter includes an inductor includes a first terminal and a second terminal, the first terminal coupled to the switching output, and a protection device coupled in series between the second terminal of the inductor and the converter output and including a control terminal. The protection device limits the output voltage supplied at the converter output based on a control voltage at the control terminal.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: April 30, 2019
    Assignee: INFINEON TECHNOLOGIES AG
    Inventors: Cristina Chiereghin, Cristian Garbossa, Stefano Orlandi
  • Publication number: 20180342944
    Abstract: According to an example, a step down converter includes switching circuit configured to control a switching output in order to generate an output voltage on a converter output within a specified range of a target voltage. The step down converter includes an inductor includes a first terminal and a second terminal, the first terminal coupled to the switching output, and a protection device coupled in series between the second terminal of the inductor and the converter output and including a control terminal. The protection device limits the output voltage supplied at the converter output based on a control voltage at the control terminal.
    Type: Application
    Filed: May 24, 2017
    Publication date: November 29, 2018
    Inventors: Cristina Chiereghin, Cristian Garbossa, Stefano Orlandi
  • Patent number: 9793809
    Abstract: In one example, a circuit includes a first voltage converter and a second voltage converter. The first voltage converter is configured to convert a first voltage to a second voltage, determine whether the first voltage converter is operating in an unsafe state, and output an indication that the first voltage converter is operating in the unsafe state. The second voltage converter is configured to selectively activate a high side switch and a low side switch to convert the second voltage to a third voltage. In response to receiving the indication that the first voltage converter is operating in the unsafe state, the second voltage converter is further configured to activate the high side switch and the low side switch to establish an electrical path between the second voltage and a reference node of the circuit.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: October 17, 2017
    Assignee: Infineon Technologies AG
    Inventors: Michael Lenz, Cristian Garbossa, Marco Piselli
  • Patent number: 9627880
    Abstract: A system is described that includes a first portion including one or more components configured to implement one or more safety functions of an application. The system further includes, a second, different portion comprising one or more different components configured to activate a safety path in response to a detection of a voltage overstress in the first portion. The system further includes a third, different portion comprising one or more different components configured to electrically couple the first portion to the second portion and to prevent the voltage overstress from propagating from the first portion to the second portion.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: April 18, 2017
    Assignee: Infineon Technologies AG
    Inventor: Cristian Garbossa
  • Publication number: 20150124363
    Abstract: A system is described that includes a first portion including one or more components configured to implement one or more safety functions of an application. The system further includes, a second, different portion comprising one or more different components configured to activate a safety path in response to a detection of a voltage overstress in the first portion. The system further includes a third, different portion comprising one or more different components configured to electrically couple the first portion to the second portion and to prevent the voltage overstress from propagating from the first portion to the second portion.
    Type: Application
    Filed: February 28, 2014
    Publication date: May 7, 2015
    Applicant: Infineon Technologies AG
    Inventor: Cristian Garbossa
  • Patent number: 8810227
    Abstract: In an embodiment, a method of operating a switched-mode power supply includes producing an error signal based on a difference between a power supply output voltage and a reference voltage. A clock frequency is produced that is proportional to the error signal up to maximum frequency, and a sensed current signal is produced that is proportional to a current in switched-mode power supply. The error signal is summed with the sensed current signal to produce a first signal, and the first signal is compared to a first threshold. The method also includes producing a first edge of a drive signal at a first edge of the clock signal, and producing a second edge of the drive signal when the first signal crosses the first threshold in a first direction based on the comparing, where the second edge opposite the first edge.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: August 19, 2014
    Assignee: Infineon Technologies Austria AG
    Inventors: Marco Flaibani, Cristian Garbossa, Enrico Orietti, Andrea Vecchiato
  • Patent number: 8497714
    Abstract: In an embodiment, a method of driving a switch transistor includes activating the switch transistor by charging a control node of the switch transistor at a first charging rate for a first time duration. After charging the control node of the switch transistor at the first charging rate, the control node of the switch transistor is further charged at a second charging rate until the control node of the switch transistor reaches a target signal level, where the second charging rate is less than the first charging rate.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: July 30, 2013
    Assignee: Infineon Technologies Austria AG
    Inventors: Cristian Garbossa, Andrea Vecchiato, Marco Flaibani, Enrico Orietti
  • Publication number: 20120182003
    Abstract: In an embodiment, a method of operating a switched-mode power supply includes producing an error signal based on a difference between a power supply output voltage and a reference voltage. A clock frequency is produced that is proportional to the error signal up to maximum frequency, and a sensed current signal is produced that is proportional to a current in switched-mode power supply. The error signal is summed with the sensed current signal to produce a first signal, and the first signal is compared to a first threshold. The method also includes producing a first edge of a drive signal at a first edge of the clock signal, and producing a second edge of the drive signal when the first signal crosses the first threshold in a first direction based on the comparing, where the second edge opposite the first edge.
    Type: Application
    Filed: January 14, 2011
    Publication date: July 19, 2012
    Inventors: Marco Flaibani, Cristian Garbossa, Enrico Orietti, Andrea Vecchiato
  • Publication number: 20120182049
    Abstract: In an embodiment, a method of driving a switch transistor includes activating the switch transistor by charging a control node of the switch transistor at a first charging rate for a first time duration. After charging the control node of the switch transistor at the first charging rate, the control node of the switch transistor is further charged at a second charging rate until the control node of the switch transistor reaches a target signal level, where the second charging rate is less than the first charging rate.
    Type: Application
    Filed: January 14, 2011
    Publication date: July 19, 2012
    Inventors: Cristian Garbossa, Andrea Vecchiato, Marco Flaibani, Enrico Orietti
  • Publication number: 20120153919
    Abstract: A method for controlling a switching converter is disclosed whereby the switching converter is configured to convert an input voltage into an output voltage supplied to a load in accordance with a switching signal, The switching converter is configured to operate in a pulse width modulation mode or, alternatively, in a pulse frequency modulation mode. When operating in the pulse width modulation mode, generating, as the switching signal, a pulse width modulated (PWM) signal of a pre-defined constant switching frequency. The PWM signal has a duty cycle that is regulated such that the output voltage of the switching converter matches, at least approximately, a desired output voltage under the condition that the duty cycle being regulated such that it does not fall below a predefined minimum duty cycle. The output voltage is monitored and switched over to the pulse frequency modulation mode when the output voltage exceeds a predefined first threshold.
    Type: Application
    Filed: December 17, 2010
    Publication date: June 21, 2012
    Inventors: Cristian Garbossa, Marco Flaibani, Andrea Vecchiato, Enrico Orietti
  • Patent number: 8188723
    Abstract: Preferred embodiments of the present invention are a switching converter, an integrated circuit package, and method for controlling a switching converter. An embodiment of the invention is a switching converter comprising a first compensation network having a first node coupled to an error voltage and a second node coupled to electrical ground and a second compensation network having an input coupled to the error voltage. A frequency domain transfer function of the first compensation network comprises a first zero and a plurality of first poles, and a frequency domain transfer function of the second compensation network comprises a second zero and a second pole.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: May 29, 2012
    Assignee: Infineon Technologies AG
    Inventors: Marco Piselli, Cristian Garbossa, Andrea Vecchiato, Emanuele Bodano, Andrea Morra, Simone Massaro, Maurizio Inversi