Patents by Inventor Etuo Funada

Etuo Funada 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).

  • Amplitude adjusting equipment in a signal translation line
    Patent number: 4544896
    Abstract: An amplitude-adjusting circuit used for a contrast-adjusting circuit of resistor division type in which a video signal is applied across a pair of series-connected resistors and an output is produced from the junction point of the two resistors. At least one of the resistors is used as a variable resistor. The amplitude-adjusting circuit comprises a current source for supplying a constant current steadily between the terminals of the variable resistor, a high-gain amplifier for controlling the resistance value of the variable resistor, and a filter for separating the video signal component from the change of the value of the variable resistor represented by a voltage change, and introducing the resistance change to the high-gain differential amplifier.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: October 1, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Michitaka Osawa, Etuo Funada, Hiroyuki Miyajima, Hitoshi Maekawa, Kunio Ando