Patents by Inventor Hisatoshi Shiramizu

Hisatoshi Shiramizu 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).

  • Video synchronization circuit comprising a PLL with a circuit to set the frequency of the output signal when the feedback signal is not present
    Patent number: 5627596
    Abstract: A video system pulse generating circuit has the frequency of the video system pulse being an integral multiple of a video synchronizing signal, and being synchronized with video synchronizing signal. The video system pulse generating circuit includes a phase locked loop circuit, a dividing circuit, and a synchronizing range determining circuit, wherein an asynchronous oscillator such as a quartz oscillator is not required.
    Type: Grant
    Filed: July 7, 1995
    Date of Patent: May 6, 1997
    Assignee: Rohm Co. Ltd.
    Inventor: Hisatoshi Shiramizu