Patents by Inventor Roberto Rivoir

Roberto Rivoir 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: 20230400536
    Abstract: In a method for measuring a Hall voltage, a Hall sensor element is made available, which includes a plurality of connection pairs for imprinting a supply current or applying a supply voltage and for capturing detection signals.
    Type: Application
    Filed: June 12, 2023
    Publication date: December 14, 2023
    Inventors: Roberto Rivoir, David Muthers
  • Patent number: 11200348
    Abstract: A side-channel attack resistant circuit topology for performing logic functions. This topology includes combinatorial logic to perform the at least one logic function. A logic input selector alternately supplies, in response to a first timing reference signal, an input to the combinatorial logic with noise generating input values and valid input values. A first latch input selector alternately supplies, in response to the first timing reference signal, a first memory element input with noise generating input values and valid logic output values. The valid logic output values are received from the combinatorial logic. A first memory element latches the valid logic output values in response to a second timing reference signal.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: December 14, 2021
    Assignee: Cryptography Research, Inc.
    Inventors: Roberto Rivoir, Elke De Mulder, Jean-Michel Cioranesco
  • Publication number: 20200167505
    Abstract: A side-channel attack resistant circuit topology for performing logic functions. This topology includes combinatorial logic to perform the at least one logic function. A logic input selector alternately supplies, in response to a first timing reference signal, an input to the combinatorial logic with noise generating input values and valid input values. A first latch input selector alternately supplies, in response to the first timing reference signal, a first memory element input with noise generating input values and valid logic output values. The valid logic output values are received from the combinatorial logic. A first memory element latches the valid logic output values in response to a second timing reference signal.
    Type: Application
    Filed: October 24, 2019
    Publication date: May 28, 2020
    Inventors: Roberto RIVOIR, Elke DE MULDER, Jean-Michel CIORANESCO
  • Patent number: 10489611
    Abstract: A side-channel attack resistant circuit topology for performing logic functions. This topology includes combinatorial logic to perform the at least one logic function. A logic input selector alternately supplies, in response to a first timing reference signal, an input to the combinatorial logic with noise generating input values and valid input values. A first latch input selector alternately supplies, in response to the first timing reference signal, a first memory element input with noise generating input values and valid logic output values. The valid logic output values are received from the combinatorial logic. A first memory element latches the valid logic output values in response to a second timing reference signal.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: November 26, 2019
    Assignee: Rambus Inc.
    Inventors: Roberto Rivoir, Elke De Mulder, Jean-Michel Cioranesco
  • Publication number: 20170061121
    Abstract: A side-channel attack resistant circuit topology for performing logic functions. This topology includes combinatorial logic to perform the at least one logic function. A logic input selector alternately supplies, in response to a first timing reference signal, an input to the combinatorial logic with noise generating input values and valid input values. A first latch input selector alternately supplies, in response to the first timing reference signal, a first memory element input with noise generating input values and valid logic output values. The valid logic output values are received from the combinatorial logic. A first memory element latches the valid logic output values in response to a second timing reference signal.
    Type: Application
    Filed: August 24, 2016
    Publication date: March 2, 2017
    Applicant: Cryptography Research, Inc
    Inventors: Roberto Rivoir, Elke De Mulder, Jean-Michel Cioranesco
  • Patent number: 5815012
    Abstract: A fully integrated voltage-to-current converter consisting of a two-stage direct amplifier with an overall feedback network having an active differential current-to-voltage converter. The first stage of the two-stage direct amplifier is a voltage-to-voltage converter receiving an input voltage signal, and the second stage is a transconductance amplifier supplying an output current. In the overall feedback network, a voltage measure of the output current is applied to a differential amplifier which cancels out all DC components and amplifies only the AC components. The amplified AC components are fed back to the input. The feedforward gain of the two-stage direct amplifier and the feedback gain of the overall feedback network may be separately adjusted. The differential amplifier includes a local resistive feedback network such that the local gain of the differential amplifier is determined by resistor values and does not introduce any non-linear elements.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: September 29, 1998
    Assignee: Atmel Corporation
    Inventors: Roberto Rivoir, Franco Maloberti
  • Patent number: 5703588
    Abstract: In a dual resistor string digital-to-analog converter, current biasing is used to isolate a first resistor string from a second resistor string. The first resistor string consist of multiple first resistors, and a first switch network responsive to the MSBs selectively couples the second resistor string in parallel to any one first resistor within the first resistor string. To prevent the second resistor string from drawing current from the first resistor string, a current source feeds a bias current into the second resistor string and a current drain draws the bias current from the second resistor string. The bias current is adjusted such that the voltage drop across the whole of the second resistor string is equal to the voltage drop across any one first resistor within the first resistor string.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: December 30, 1997
    Assignee: Atmel Corporation
    Inventors: Roberto Rivoir, Franco Maloberti, Guido P. Torelli