Patents by Inventor Runchan D. Yang

Runchan D. Yang 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).

  • Fault tolerant memory system
    Patent number: 5553231
    Abstract: A fault tolerant clock system is provided by utilizing redundant clocks which are maintained in synchronization, with voting circuit serving to select one of a plurality of matching clock signals for use. A resistor is coupled in series between the crystal and the oscillation circuit in order to establish a desired duty cycle of the clock signal. A series connected diode capacitor network is connected between a node of the oscillator circuit and a power supply in order to ensure initiation of oscillation.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: September 3, 1996
    Assignee: Zitel Corporation
    Inventors: Robert L. Papenberg, Runchan D. Yang, David H. Wotring, Mohammad F. Rydhan, Paul Voloshin, Mohamed M. Talaat
  • Fault tolerant memory system
    Patent number: 5379415
    Abstract: A memory system in which fault tolerance is achieved utilizing redundant clocks. The redundant clocks are synchronized, and a voter is used to deselect nonmatching clocks, thereby avoiding clocking errors. A circuit is provided to ensure a nonoscillating clock provides an output level at a desired state. Another circuit is provided to ensure oscillation upon power up.
    Type: Grant
    Filed: September 29, 1992
    Date of Patent: January 3, 1995
    Assignee: Zitel Corporation
    Inventors: Robert L. Papenberg, Runchan D. Yang, David H. Wotring, Mohammad F. Rydhan, Paul Voloshin, Mohamed M. Talaat