Patents by Inventor Gianmarco Marchesi

Gianmarco Marchesi 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).

  • Low switching noise output buffer
    Patent number: 5420525
    Abstract: The switching noise generated by a data output buffer is greatly reduced by "precharging" the output node to an intermediate voltage during a system's "dead" time. This is done with a precharging output current pulse having a constant time derivative during a first time interval and a constant time derivative of opposite sign during a second time interval, before performing the actual switching with an output current having a constant time derivative, during a third time interval. The partial precharging with a controlled, triangular-shaped, output current pulse, avoids any abrupt change of output current and thus limits switching noise. The buffer of the invention is particularly useful in high-speed memory devices.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: May 30, 1995
    Assignee: SGS-Thomson Microelectronics, S.r.l.
    Inventors: Franco Maloberti, Gianmarco Marchesi, Guido Torelli
  • Signals generator having non-overlapping phases and high frequency
    Patent number: 5357217
    Abstract: A signal generator which includes two matched ring oscillators, and feedback gates which cross-couple each ring oscillator to the other. That is, in each oscillator, a first node gates a coupling transistor which connects a second node (complementary to the first node) across to drive the first node of the other oscillator.
    Type: Grant
    Filed: May 13, 1993
    Date of Patent: October 18, 1994
    Assignee: SGS-Thomson Microelectronics, S.r.l.
    Inventors: Gianmarco Marchesi, Guido Torelli