Patents by Inventor Riccardo Ursino

Riccardo Ursino 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: 5945819
    Abstract: The invention relates to a voltage regulator connected between first and second voltage references and having an output terminal for delivering a regulated output voltage. The voltage regulator includes at least one voltage divider, connected between the output terminal and the second voltage reference, and a serial output element connected between the output terminal and the first voltage reference. The voltage divider is connected to the serial output element by a first conduction path which includes at least one error amplifier whose output is connected to at least one driver for turning off the serial output element. The voltage regulator includes, between the voltage divider and the serial output element, at least a second conduction path for turning off the serial output element according to a value of the regulated output voltage in advance of the action of the first conduction path.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: August 31, 1999
    Assignees: SGS-Thomson Microelectronics S.r.l., Consorzio per la Ricerca sulla Microelettronica nel Mezzogiorno
    Inventors: Riccardo Ursino, Roberto Gariboldi
  • Patent number: 5668508
    Abstract: An oscillating circuit including a capacitor, a charge circuitry and a control circuitry. The charge circuitry includes first and second current generators having respectively first and second current values that are opposite in direction and a switching circuit designed to couple alternately the generators to the capacitor. The control circuitry has a voltage input coupled to the capacitor and an output coupled to control inputs of the switching circuit and includes a comparator with hysteresis having a lower threshold and an upper threshold. The difference between the upper threshold and the lower threshold is chosen to be substantially proportional to the ratio of the product to the sum of the two current values such that the oscillation frequency and the duty cycle do not depend on the supply voltage, the temperature and the process.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: September 16, 1997
    Assignees: Co.Ri.M.Me - Consorzio per la Ricerca sulla Microelettronica nel Mezzogiorno, SGS-Thomson Microelectronics S.r.l.
    Inventors: Francesco Pulvirenti, Riccardo Ursino, Roberto Gariboldi