Patents by Inventor Mikio Hanabusa

Mikio Hanabusa 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: 7437132
    Abstract: A receiving device includes a receiver circuit for outputting a received signal as a reception electric field intensity signal, an operation control circuit for controlling an operation of the receiver circuit, and an intermittent reception control circuit for outputting a periodic signal. A comparator circuit holds a first threshold indicating that the receiving device has entered a communication area and a second threshold indicating a start of a continuous electric field intensity measurement. If the reception electric field intensity signal is lower than the second threshold, the operation control circuit makes the receiver circuit perform intermittent operation. If the reception electric field intensity signal is equal to or higher than the second threshold, the operation control circuit makes the receiver circuit perform a continuous operation.
    Type: Grant
    Filed: August 29, 2005
    Date of Patent: October 14, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mikio Hanabusa, Kazunori Watanabe, Kaoru Ishida
  • Patent number: 7319884
    Abstract: A transmission power control method includes a step (a) of receiving by a receiver a radio wave signal, a step (b) of judging whether a first identification signal is included in the received radio wave signal, a step (c) of detecting a reception electric field intensity of the radio wave signal included in the radio wave signal in the case where the first identification signal is included in the radio wave signal, a step (d) of obtaining a radio wave propagation state between a home station and the station to communicate with by using the reception electric field intensity detected at the step (c) and determining transmission power of the transmission radio wave signal based upon the radio wave propagation state, a step (g) of invalidating the radio wave propagation state obtained upon the previous reception in the case where the interval between an end of communication and a restart of communication is longer than a time determined in advance, a step (e) of superimposing a second identification signal on th
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: January 15, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masaki Suzuka, Mikio Hanabusa
  • Publication number: 20070291825
    Abstract: In a spread spectrum receiver apparatus, frequency converters (201-1) and 201-2) convert two radio signals spread-spectrum modulated according to a spreading code and having carrier frequencies different from each other, into intermediate frequency signals having a substantially identical intermediate frequency, and outputs the intermediate frequency signals. An adder (102) adds up the two intermediate frequency signals outputted from the respective frequency converters (201-1 and 201-2), and outputs an intermediate frequency signal combined as a result of addition to a receiving processor (104) via an analog signal processor (103) and an A/D converter (117). The receiving processor (104) despreads digital signals included in the two respective radio signals using the spreading code based on a digital signal from the A/D converter (117), to demodulate the digital signal to digital data and output the digital data.
    Type: Application
    Filed: December 20, 2005
    Publication date: December 20, 2007
    Inventors: Tokio Endoh, Mikio Hanabusa
  • Publication number: 20060073857
    Abstract: A receiving device includes a receiver circuit for outputting a received signal as a reception electric field intensity signal, an operation control circuit for controlling an operation of the receiver circuit, and an intermittent reception control circuit for outputting a periodic signal. A comparator circuit holds a first threshold indicating that the receiving device has entered a communication area and a second threshold indicating a start of a continuous electric field intensity measurement. If the reception electric field intensity signal is lower than the second threshold, the operation control circuit makes the receiver circuit perform intermittent operation. If the reception electric field intensity signal is equal to or higher than the second threshold, the operation control circuit makes the receiver circuit perform a continuous operation.
    Type: Application
    Filed: August 29, 2005
    Publication date: April 6, 2006
    Inventors: Mikio Hanabusa, Kazunori Watanabe, Kaoru Ishida
  • Publication number: 20050208899
    Abstract: The object of the present invention is to provide a radio communication apparatus including a receiving circuit block including a received signal strength signal circuit, a demodulating circuit block including a noise level determination circuit, an identifying signal determination circuit block including an identifying signal processing circuit and an identifying signal determination circuit, an audio circuit block, a transmitting circuit, an intermittent time control circuit, a timer circuit, and a power supply control circuit. According to a reception state, the power supply control circuit sequentially supplies power only to a required circuit(s) among the receiving circuit block, the demodulating circuit block, and the identifying signal determination circuit block. Meanwhile, an off-time of communication set by a timer circuit according to communication frequency is varied by the intermittent time control circuit.
    Type: Application
    Filed: December 22, 2004
    Publication date: September 22, 2005
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventor: Mikio Hanabusa
  • Publication number: 20050119022
    Abstract: A transmission power control method includes a step (a) of receiving by a receiver a radio wave signal, a step (b) of judging whether a first identification signal is included in the received radio wave signal, a step (c) of detecting a reception electric field intensity of the radio wave signal included in the radio wave signal in the case where the first identification signal is included in the radio wave signal, a step (d) of obtaining a radio wave propagation state between a home station and the station to communicate with by using the reception electric field intensity detected at the step (c) and determining transmission power of the transmission radio wave signal based upon the radio wave propagation state, a step (g) of invalidating the radio wave propagation state obtained upon the previous reception in the case where the interval between an end of communication and a restart of communication is longer than a time determined in advance, a step (e) of superimposing a second identification signal on th
    Type: Application
    Filed: December 1, 2004
    Publication date: June 2, 2005
    Inventors: Masaki Suzuka, Mikio Hanabusa
  • Patent number: 4816782
    Abstract: A modulation sensitivity correction circuit in which a phase-locked loop includes a voltage-controlled oscillator (VCO) and a phase detector. When an audio signal is applied to the VCO through an electronic volume control so as to be modulated, control for the electronic volume control is effected by using a control voltage obtained by applying an output of the phase detector to a conversion circuit having a characteristic which is the reverse of the modulation sensitivity characteristic of the VCO, so that the modulation sensitivity can be kept constant over a wide band.
    Type: Grant
    Filed: September 11, 1987
    Date of Patent: March 28, 1989
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kouichi Kunitomo, Mikio Hanabusa