Patents by Inventor Sigeo Hayashi

Sigeo Hayashi 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).

  • Light-receiving circuit
    Patent number: 7265333
    Abstract: The present invention is to provide a light-receiving circuit, in particular, the circuit for an avalanche photodiode (APD), in which the current of the APD is dynamically controlled to protect the APD from the over current. The circuit comprises the high voltage source, the current mirror circuit connected to the high voltage source, the APD connected to one of the current output terminal of the current mirror circuit, and the current source connected to the other current output terminal of the current mirror circuit. The current flowing out from the other current output terminal is dynamically controlled by the current source to protect the APD from the over current.
    Type: Grant
    Filed: August 8, 2005
    Date of Patent: September 4, 2007
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Moriyasu Ichino, Sigeo Hayashi
  • Light-receiving circuit
    Publication number: 20060027736
    Abstract: The present invention is to provide a light-receiving circuit, in particular, the circuit for an avalanche photodiode (APD), in which the current of the APD is dynamically controlled to protect the APD from the over current. The circuit comprises the high voltage source, the current mirror circuit connected to the high voltage source, the APD connected to one of the current output terminal of the current mirror circuit, and the current source connected to the other current output terminal of the current mirror circuit. The current flowing out from the other current output terminal is dynamically controlled by the current source to protect the APD from the over current.
    Type: Application
    Filed: August 8, 2005
    Publication date: February 9, 2006
    Inventors: Moriyasu Ichino, Sigeo Hayashi