Patents by Inventor Joseph A. Ruggieri

Joseph A. Ruggieri 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).

  • Time-to-voltage converter
    Patent number: 4504155
    Abstract: A constant current source is provided to charge a reference capacitor. The current is switched to the capacitor by a first high-speed analog switch when a first event occurs and the current is turned off by a second high-speed analog switch when a second event occurs. The voltage produced by the charge on the capacitor is proportional to the time between events. A sample and hold circuit maintains the maximum voltage on the capacitor when the events are periodic.
    Type: Grant
    Filed: March 1, 1984
    Date of Patent: March 12, 1985
    Assignee: Chip Supply
    Inventor: Joseph A. Ruggieri