Patents by Inventor Hidetaro Watanabe

Hidetaro Watanabe 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).

  • Patent number: 4258311
    Abstract: A constant voltage generator capable of generating a constant voltage having a fixed temperature coefficient regardless of manufacturing errors is disclosed. The constant voltage generator comprises a transistor construction having a forwardly biased PN-junction, a Zener diode connected in series to an electrical path between the emitter and a collector of the transistor construction, a first resistor connected between a base and the emitter of the transistor construction, and a second resistor connected between the base and the collector of the transistor construction. The transistor construction, the Zener diode and the first and second resistors are all formed in a common semiconductor substrate, the first resistor being composed of a region of one conductivity type and the second resistor being composed of a pinch resistor formed in the substrate.
    Type: Grant
    Filed: December 19, 1978
    Date of Patent: March 24, 1981
    Assignee: Nippon Electric Co., Ltd.
    Inventors: Kazuo Tokuda, Hidetaro Watanabe, Yoshikazu Shimizu