Patents by Inventor Hiroaki Nagano

Hiroaki Nagano 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: 6324385
    Abstract: A reception carrier wave, of which a frequency fL0 agrees with a frequency fRX of a reception wave, is generated, a first transmission carrier wave, of which a frequency fL1 is equivalent to twice of a difference value between the reception frequency and a frequency fTX of a transmission wave, is generated, and a second transmission carrier wave of which a frequency fL2 is equivalent to a difference value between the frequency fL0 and the frequency fL1, is generated. The reception carrier wave is mixed with the reception wave to produce a reception signal. The frequency of the first transmission carrier wave is halved, and the first transmission carrier wave is mixed with a transmission signal to produce a modulated wave. The second transmission carrier wave is mixed with the modulated wave to produce a transmission wave.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: November 27, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroaki Nagano, Kazuhiro Mori, Kenji Itoh
  • Publication number: 20010029406
    Abstract: The present invention provides contact sensors capable of determining the pressure distribution over the whole surface of each of joint units having a cylindrical shape, both end portions of which are cut at an offset angle, and constituting robot arms. In order to provide a technology enabling real-time drive control of the robot arms by using detected values from these sensors, the points of intersection of the electrodes are distributed across the whole surface of each joint by forming a pressure-sensitive sheet sensor in which column electrodes arranged in parallel, and row electrodes arranged in a wound-string shape, are combined, these joints having a cylindrical shape, both end portions of which are cut at an offset angle. In addition, by making an electrode structure that covers a prescribed width in both rows and columns, the number of signal output terminals is reduced and the operation processing load is lightened.
    Type: Application
    Filed: April 10, 2001
    Publication date: October 11, 2001
    Applicant: NATIONAL AEROSPACE LABORATORY OF JAPAN,
    Inventors: Osamu Okamoto, Teruomi Nakaya, Heihachiro Kaminura, Isao Yamaguchi, Seizo Suzuki, Kazuyoshi Yabuuchi, Jyunichi Ueno, Yasuoki Usui, Hiroaki Nagano, Katsuhiko Renbutsu, Mitsuharu Izaki
  • Patent number: 6260975
    Abstract: A power control apparatus is described that includes a power level adjusting circuit (11) for adjusting an input signal to a desired power level in accordance with a control voltage to output a obtained result; a control voltage generating circuit (12 to 18) for comparing a current output power of the power level adjusting circuit (11) with a target power level to generate the control voltage based on a result of comparison; a low-pass filter (19a) operating in accordance with either a first time constant or a second time constant which is smaller than the first time constant, for filtering the control voltage generated by the control voltage generating circuit (12 to 18) to be supplied to the power level adjusting circuit (11); and filter controlling means (19b) for causing the low-pass filter (19a) to operate in accordance with the second time constant at a first transition of the output power of the power level adjusting circuit (11) and for causing the low-pass filter (19a) to operate in accordance with t
    Type: Grant
    Filed: February 2, 2000
    Date of Patent: July 17, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Hiroaki Nagano
  • Patent number: 5416441
    Abstract: Deformed rises and overshoots in the waveform of an RF output signal in the burst transmission mode are prevented by short-circuiting both ends of the capacitor of a low-pass filter with a switch having a control terminal, before the start of transmission.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: May 16, 1995
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Hiroaki Nagano