Patents by Inventor Kietsu Saito

Kietsu Saito 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 controlled oscillator
    Patent number: 8547183
    Abstract: There is provided a voltage controlled oscillator that is compact and can be manufactured at low cost. The voltage controlled oscillator is structured to include: a resonance part including a variable capacitance element and an inductance element, the variable capacitance element having a capacitance that varies according to a control voltage for frequency control input from an external part, and a series resonant frequency of the resonance part being adjusted according to the capacitance; an amplifying part amplifying a frequency signal from the resonance part; and a feedback part including a capacitance element for feedback and feeding the frequency signal amplified by the amplifying part back to the resonance part to form an oscillation loop together with the amplifying part and the resonance part, wherein the amplifying part is provided in an integrated circuit chip, and the resonance part and the capacitance element for feedback are formed as circuit components separate from the integrated circuit chip.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: October 1, 2013
    Assignee: Nihon Dempa Kogyo Co., Ltd.
    Inventors: Junichiro Yamakawa, Kazuo Akaike, Mikio Takano, Hiroshi Hoshigami, Kenji Kawahata, Kietsu Saito, Yasushi Yamamoto, Tatsunori Onzuka, Toshimasa Tsuda, Susumu Yoshimoto
  • Voltage controlled oscillator
    Publication number: 20110080223
    Abstract: There is provided a voltage controlled oscillator that is compact and can be manufactured at low cost. The voltage controlled oscillator is structured to include: a resonance part including a variable capacitance element and an inductance element, the variable capacitance element having a capacitance that varies according to a control voltage for frequency control input from an external part, and a series resonant frequency of the resonance part being adjusted according to the capacitance; an amplifying part amplifying a frequency signal from the resonance part; and a feedback part including a capacitance element for feedback and feeding the frequency signal amplified by the amplifying part back to the resonance part to form an oscillation loop together with the amplifying part and the resonance part, wherein the amplifying part is provided in an integrated circuit chip, and the resonance part and the capacitance element for feedback are formed as circuit components separate from the integrated circuit chip.
    Type: Application
    Filed: September 29, 2010
    Publication date: April 7, 2011
    Applicant: NIHON DEMPA KOGYO CO., LTD.
    Inventors: Junichiro Yamakawa, Kazuo Akaike, Mikio Takano, Hiroshi Hoshigami, Kenji Kawahata, Kietsu Saito, Yasushi Yamamoto, Tatsunori Onzuka, Toshimasa Tsuda, Susumu Yoshimoto
  • Crystal resonator for a bio-sensor
    Patent number: D526583
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: August 15, 2006
    Assignee: Nihon Dempa Kogyo Co., Ltd.
    Inventors: Shunichi Wakamatsu, Mitsuaki Koyama, Kietsu Saito
  • Ultrasonic probe
    Patent number: D544606
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: June 12, 2007
    Assignee: Nihon Dempa Kogyo Co., Ltd.
    Inventors: Yasunobu Hasegawa, Kietsu Saito
  • Temperature controlled oven for bio-sensor
    Patent number: D574280
    Type: Grant
    Filed: June 20, 2007
    Date of Patent: August 5, 2008
    Assignee: Nihon Dempa Kogyo Co., Ltd.
    Inventors: Shunichi Wakamatsu, Hiroyuki Kukita, Kietsu Saito