Patents by Inventor Roman Riederer
Roman Riederer 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: 9461536Abstract: In one example, a method includes receiving a voltage value and comparing the voltage value to a reference voltage value to determine a delta voltage value. The method may also include determining a reference current value based on the delta voltage value. The method may also include receiving a current value and comparing the current value to the reference current value to determine a delta current value. The method may also include determining a threshold value based on the delta current value, where the threshold value is used to define a control signal that controls a power converter.Type: GrantFiled: November 27, 2013Date of Patent: October 4, 2016Assignee: Infineon Technologies Austria AGInventors: Luca Bizjak, Stefano Marsili, Roman Riederer, Stylianos Perissakis
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Patent number: 9444332Abstract: In accordance with an embodiment, a controller for a switched mode power supply includes an average current comparator that determines whether an average current within the switched mode power supply is below a current threshold, and a switch signal generation circuit coupled to the average current comparator having switch signal outputs configured to be coupled to a switching circuit of the switched mode power supply. The switch signal generation circuit produces a first switching pattern in a first mode of operation and produces a second switching pattern a second mode of operation. When the average current comparator determines that the average current is below the current threshold, the switch signal generation circuit is operated in a first mode, and when the average current comparator determines that the average current is not below the current threshold, the switch signal generation circuit is operated in a second mode.Type: GrantFiled: October 7, 2013Date of Patent: September 13, 2016Assignee: Infineon Technologies Austria AGInventors: Luca Bizjak, Gerhard Maderbacher, Roman Riederer, Stylianos Perissakis
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Patent number: 9312760Abstract: A power converter is described that includes components arranged within a first die and a second die of a single package. The first die includes one or more first switches coupled to a switching node of a power stage. The second die includes one or more second switches coupled to the switching node of the power stage, a feedback control unit configured to detect a current level at the one or more second switches of the power stage, and a controller unit configured to control the one or more first switches and the one or more second switches of the power stage based at least in part on the current level detected by the feedback control unit.Type: GrantFiled: December 16, 2013Date of Patent: April 12, 2016Assignee: Infineon Technologies Austria AGInventors: Christoph Sandner, Roman Riederer, Josef Höglauer, Stephan Auer
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Publication number: 20150171748Abstract: A power converter is described that includes components arranged within a first die and a second die of a single package. The first die includes one or more first switches coupled to a switching node of a power stage. The second die includes one or more second switches coupled to the switching node of the power stage, a feedback control unit configured to detect a current level at the one or more second switches of the power stage, and a controller unit configured to control the one or more first switches and the one or more second switches of the power stage based at least in part on the current level detected by the feedback control unit.Type: ApplicationFiled: December 16, 2013Publication date: June 18, 2015Applicant: Infineon Technologies Austria AGInventors: Christoph Sandner, Roman Riederer, Josef Höglauer, Stephan Auer
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Publication number: 20150145486Abstract: In one example, a method includes receiving a voltage value and comparing the voltage value to a reference voltage value to determine a delta voltage value. The method may also include determining a reference current value based on the delta voltage value. The method may also include receiving a current value and comparing the current value to the reference current value to determine a delta current value. The method may also include determining a threshold value based on the delta current value, where the threshold value is used to define a control signal that controls a power converter.Type: ApplicationFiled: November 27, 2013Publication date: May 28, 2015Applicant: Infineon Technologies Austria AGInventors: Luca Bizjak, Stefano Marsili, Roman Riederer, Stylianos Perissakis
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Publication number: 20150097544Abstract: In accordance with an embodiment, a controller for a switched mode power supply includes an average current comparator that determines whether an average current within the switched mode power supply is below a current threshold, and a switch signal generation circuit coupled to the average current comparator having switch signal outputs configured to be coupled to a switching circuit of the switched mode power supply. The switch signal generation circuit produces a first switching pattern in a first mode of operation and produces a second switching pattern a second mode of operation. When the average current comparator determines that the average current is below the current threshold, the switch signal generation circuit is operated in a first mode, and when the average current comparator determines that the average current is not below the current threshold, the switch signal generation circuit is operated in a second mode.Type: ApplicationFiled: October 7, 2013Publication date: April 9, 2015Applicant: INFINEON TECHNOLOGIES AUSTRIA AGInventors: Luca Bizjak, Gerhard Maderbacher, Roman Riederer, Stylianos Perissakis
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Patent number: 8866341Abstract: A voltage regulator circuit for providing a regulated output voltage is provided. The voltage regulator circuit includes an error amplifier configured to provide a control signal based on at least a portion of a fed-back output voltage and a reference voltage. A first output stage is configured to operate at a first supply voltage and provide the regulated output voltage based on the control signal. At least one second output stage configured to operate at a second supply voltage different from the first supply voltage and provide the regulated output voltage based on the control signal. A switch-over unit is configured to switch over the control signal between the first output stage and the second output stage.Type: GrantFiled: January 10, 2011Date of Patent: October 21, 2014Assignee: Infineon Technologies AGInventor: Roman Riederer
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Publication number: 20120176109Abstract: A voltage regulator circuit for providing a regulated output voltage is provided. The voltage regulator circuit includes an error amplifier configured to provide a control signal based on at least a portion of a fed-back output voltage and a reference voltage. A first output stage is configured to operate at a first supply voltage and provide the regulated output voltage based on the control signal. At least one second output stage configured to operate at a second supply voltage different from the first supply voltage and provide the regulated output voltage based on the control signal. A switch-over unit is configured to switch over the control signal between the first output stage and the second output stage.Type: ApplicationFiled: January 10, 2011Publication date: July 12, 2012Applicant: Infineon Technologies AGInventor: Roman Riederer
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Patent number: 7342760Abstract: A circuit arrangement for protection against electrostatic discharge for a field-effect transistor is disclosed. The arrangement includes a first and a second controllable path each having a control terminal. The control terminals of the controllable paths are coupled to a source terminal of the field-effect transistor. A first terminal of the first controllable path is connected to a control terminal of the transistor, and a first terminal of the second controllable path is connected to a bulk terminal of the unipolar transistor. Second terminals of the controllable paths are connected to the drain terminal. A voltage regulating device includes the circuit arrangement and a comparator configured to generate a control signal in a manner dependent on a difference between two signals applied thereto. A control output of the comparator is coupled to the control terminal of the transistor.Type: GrantFiled: August 31, 2004Date of Patent: March 11, 2008Assignee: Infineon Technologies AGInventors: Markus Müllauer, Roman Riederer
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Publication number: 20050083622Abstract: A circuit arrangement for protection against electrostatic discharge for a field-effect transistor is disclosed. The arrangement includes a first and a second controllable path each having a control terminal. The control terminals of the controllable paths are coupled to a source terminal of the field-effect transistor. A first terminal of the first controllable path is connected to a control terminal of the transistor, and a first terminal of the second controllable path is connected to a bulk terminal of the unipolar transistor. Second terminals of the controllable paths are connected to the drain terminal. A voltage regulating device includes the circuit arrangement and a comparator configured to generate a control signal in a manner dependent on a difference between two signals applied thereto. A control output of the comparator is coupled to the control terminal of the transistor.Type: ApplicationFiled: August 31, 2004Publication date: April 21, 2005Inventors: Markus Mullauer, Roman Riederer