Patents by Inventor Yoshihide Okumura

Yoshihide Okumura 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).

  • Voltage monitoring circuit
    Patent number: 5568074
    Abstract: The positive input terminal (1), the negative input terminal (2) and the differential amplifier (10) are connected to the voltage converting circuit (9a). The differential amplifier (10) is composed of the operational amplifier (6) and the resistors (5a, 5b, 5c and 5d). The voltage converting circuit (9a) includes NPN transistors (91, 92 and 93). The base of the transistor (91) is connected to the positive input terminal (1) and the base of the transistor (92) is connected to the reference potential input end (3) to which the reference potential (V.sub.x) is applied, respectively. The collectors of the transistors (91 and 92) are connected to the potential point (81) in common and the emitters are connected to the other end of the resistor (5a). The base of the transistor (93) is connected to the negative input terminal (2), the collector is connected to the potential point (81) and the emitter is connected to the other end of the resistor (5c).
    Type: Grant
    Filed: September 20, 1994
    Date of Patent: October 22, 1996
    Assignees: Kanebo, Ltd., Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kouichi Kitaguchi, Yoshihide Okumura