Patents by Inventor Ikuroh Ichitsubo

Ikuroh Ichitsubo 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: 10027287
    Abstract: The present disclosure relates to a World Band Radio Frequency Power Amplifier and a World Band Radio Frequency Front End Module. The World Band Power Amplifier can contain at least one broadband power amplifier connected to a switch which can direct an RF input signal to a plurality of transmission paths, each transmission path configured for a different frequency. The World Band RFFE Module is more integrated version of the World Band Power Amplifier that can contain broadband RF PA(s), switches, logic controls, filters, duplexers and other active and passive components. The module may also include a thermal protection system capable of effecting operation of the broadband power amplifier.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: July 17, 2018
    Assignee: MICRO MOBIO CORPORATION
    Inventors: Ikuroh Ichitsubo, Shinsuke Inui, Guan-Wu Wang, Weiping Wang, Zlatko Filipovic
  • Patent number: 9515615
    Abstract: The present disclosure relates to a World Band Radio Frequency Power Amplifier and a World Band Radio Frequency Front End Module. The World Band Power Amplifier can contain at least one broadband power amplifier connected to a switch which can direct an RF input signal to a plurality of transmission paths, each transmission path configured for a different frequency. The World Band RFFE Module is more integrated version of the World Band Power Amplifier that can contain broadband RF PA(s), switches, logic controls, filters, duplexers and other active and passive components.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: December 6, 2016
    Assignee: MICRO MOBIO CORPORATION
    Inventors: Ikuroh Ichitsubo, Shinsuke Inui, Guan-Wu Wang, Weiping Wang, Zlatko Filipovic
  • Patent number: 9405332
    Abstract: A linear amplifier circuit includes a multi-stage power amplifier that can amplify an input signal to produce an output signal, and a gain feedback control circuit coupled with the output and the input of the multi-stage power amplifier. An adjacent-channel leakage feedback control circuit can detect the output signal at the output of the multi-stage power amplifier and reduce adjacent-channel leakage in the output signal over an output power range based on the detected output signal.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: August 2, 2016
    Assignee: MICRO MOBIO CORPORATION
    Inventors: Ikuroh Ichitsubo, Musaya Kuwano, Koshiro Matsumoto
  • Publication number: 20160079934
    Abstract: The present disclosure relates to a World Band Radio Frequency Power Amplifier and a World Band Radio Frequency Front End Module. The World Band Power Amplifier can contain at least one broadband power amplifier connected to a switch which can direct an RF input signal to a plurality of transmission paths, each transmission path configured for a different frequency. The World Band RFFE Module is more integrated version of the World Band Power Amplifier that can contain broadband RF PA(s), switches, logic controls, filters, duplexers and other active and passive components.
    Type: Application
    Filed: November 2, 2015
    Publication date: March 17, 2016
    Inventors: Ikuroh Ichitsubo, Shinsuke lnui, Guan-Wu Wang, Weiping Wang, Zlatko Filipovic
  • Publication number: 20150323964
    Abstract: A linear amplifier circuit includes a multi-stage power amplifier that can amplify an input signal to produce an output signal, and a gain feedback control circuit coupled with the output and the input of the multi-stage power amplifier. An adjacent-channel leakage feedback control circuit can detect the output signal at the output of the multi-stage power amplifier and reduce adjacent-channel leakage in the output signal over an output power range based on the detected output signal.
    Type: Application
    Filed: July 20, 2015
    Publication date: November 12, 2015
    Inventors: Ikuroh Ichitsubo, Musaya Kuwana, Koshiro Matsumoto
  • Patent number: 9178555
    Abstract: The present disclosure relates to a World Band Radio Frequency Power Amplifier and a World Band Radio Frequency Front End Module. The World Band Power Amplifier can contain at least one broadband power amplifier connected to a switch which can direct an RF input signal to a plurality of transmission paths, each transmission path configured for a different frequency. The World Band RFFE Module is more integrated version of the World Band Power Amplifier that can contain broadband RF PA(s), switches, logic controls, filters, duplexers and other active and passive components.
    Type: Grant
    Filed: June 16, 2013
    Date of Patent: November 3, 2015
    Assignee: Micro Mobio Corporation
    Inventors: Ikuroh Ichitsubo, Shinsuke Inui, Guan-Wu Wang, Weiping Wang, Zlatko Aurelio Filipovic
  • Patent number: 9088258
    Abstract: A linear amplifier circuit includes a multi-stage power amplifier that can amplify an input signal to produce an output signal, and a gain feedback control circuit coupled with the output and the input of the multi-stage power amplifier. An adjacent-channel leakage feedback control circuit can detect the output signal at the output of the multi-stage power amplifier and reduce adjacent-channel leakage in the output signal over an output power range based on the detected output signal.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: July 21, 2015
    Assignee: Micro Mobio Corporation
    Inventors: Ikuroh Ichitsubo, Masaya Kuwano, Koshiro Matsumoto
  • Publication number: 20140235184
    Abstract: The present disclosure relates to a World Band Radio Frequency Power Amplifier and a World Band Radio Frequency Front End Module. The World Band Power Amplifier can contain at least one broadband power amplifier connected to a switch which can direct an RF input signal to a plurality of transmission paths, each transmission path configured for a different frequency. The World Band RFFE Module is more integrated version of the World Band Power Amplifier that can contain broadband RF PA(s), switches, logic controls, filters, duplexers and other active and passive components.
    Type: Application
    Filed: June 16, 2013
    Publication date: August 21, 2014
    Applicant: Micro Mobio Corporation
    Inventors: Ikuroh Ichitsubo, Shinsuke Inui, Guan-Wu Wang, Weiping Wang, ZLatko Aurelio Filipovic
  • Patent number: 8253496
    Abstract: A radio frequency (RF) amplifier circuit includes a first impedance matching circuit configured to receive an input RF signal, a control circuit configured to produce a band control signal according to the frequency of the input RF signal, an RF amplifier having its input connected to the first impedance matching circuit. The RF amplifier can produce an amplified RF signal in response to the input RF signal. A second impedance matching circuit can receive the amplified RF signal from the RF amplifier. At least one of the first impedance matching circuit and the second impedance matching circuit has an impedance that is adjustable by the band control signal. A multi-band filter can switch the amplified RF signal from the second impedance matching circuit to one of selectable narrow-band filters in response to the band control signal.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: August 28, 2012
    Assignee: Micro Mobio Corporation
    Inventors: Ikuroh Ichitsubo, Kanya Kubota, Shigeru Watanabe, Brian Michael Wang
  • Patent number: 8189713
    Abstract: A wireless communication device includes an RF transceiver configured to up convert a base band signal to a transmitting RF signal, a configurable matrix power amplifier circuit configured to amplify the transmitting RF signal to produce an amplified RF signal, and an antenna configured to transmit a wireless signal in response to the amplified RF signal.
    Type: Grant
    Filed: January 18, 2010
    Date of Patent: May 29, 2012
    Assignee: Micro Mobio Corporation
    Inventors: Inui Shinsuke, Ikuroh Ichitsubo, Shigeru Watanabe
  • Publication number: 20110176623
    Abstract: A wireless communication device includes an RF transceiver configured to up convert a base band signal to a transmitting RF signal, a configurable matrix power amplifier circuit configured to amplify the transmitting RF signal to produce an amplified RF signal, and an antenna configured to transmit a wireless signal in response to the amplified RF signal.
    Type: Application
    Filed: January 18, 2010
    Publication date: July 21, 2011
    Inventors: Inui Shinsuke, Ikuroh Ichitsubo, Shigeru Watanabe
  • Patent number: 7925227
    Abstract: An amplifier circuit includes a first power amplifier that can produce a first amplified signal in response to a first input signal in a first frequency band, and a second power amplifier that can produce a second amplified signal in response to a second input signal in a second frequency band. A center frequency of the second frequency band is higher than the a center frequency of frequency band A control circuit can turn on or turn off the first power amplifier and configured to turn on or turn off the second power amplifier. A shunting circuit is coupled to an output of the second power amplifier. The shunting circuit can attenuate harmonic signals from the first frequency band under the control of the control circuit.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: April 12, 2011
    Assignee: Micro Mobio Corporation
    Inventor: Ikuroh Ichitsubo
  • Publication number: 20100321110
    Abstract: A radio frequency (RF) amplifier circuit includes a first impedance matching circuit configured to receive an input RF signal, a control circuit configured to produce a band control signal according to the frequency of the input RF signal, an RF amplifier having its input connected to the first impedance matching circuit. The RF amplifier can produce an amplified RF signal in response to the input RF signal. A second impedance matching circuit can receive the amplified RF signal from the RF amplifier. At least one of the first impedance matching circuit and the second impedance matching circuit has an impedance that is adjustable by the band control signal. A multi-band filter can switch the amplified RF signal from the second impedance matching circuit to one of selectable narrow-band filters in response to the band control signal.
    Type: Application
    Filed: August 31, 2010
    Publication date: December 23, 2010
    Inventors: Ikuroh Ichitsubo, Kanya Kubota, Shigeru Watanabe, Brian Michael Wang
  • Publication number: 20100253435
    Abstract: A radio frequency amplifier module includes a first transmitting RF amplifier configured to produce a first amplified RF signal in response to an input RF signal, a second transmitting RF amplifier configured to produce a second amplified RF signal in response to the first amplified RF signal, and an inter-stage impedance matching circuit that is in part formed by a bond wire.
    Type: Application
    Filed: June 18, 2010
    Publication date: October 7, 2010
    Inventors: Ikuroh Ichitsubo, Guan-wu Wang, Weiping Wang
  • Patent number: 7808312
    Abstract: A broad-band linear amplifier circuit includes a driver amplifier to produce a first amplified radio frequency (RF) signal in a first single RF band in response to a first input RF signal and to produce a second amplified RF signal in a second single RF band in response to a second input RF signal. The first single RF band and the second single RF band reside in a broad band that has a bandwidth more than two times a bandwidth of the first single RF band or the second single RF band. A sensing circuit can sense a power, a gain, or a phase of the first output RF signal and the second output RF signal, and to produce a sensing signal. A gain control circuit controls gain variation of the driver amplifier in response to the sensing signal.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: October 5, 2010
    Assignee: Micro Mobio Corporation
    Inventors: Ikuroh Ichitsubo, Brian Michael Wang
  • Publication number: 20100219887
    Abstract: A linear amplifier circuit includes a multi-stage power amplifier that can amplify an input signal to produce an output signal, and a gain feedback control circuit coupled with the output and the input of the multi-stage power amplifier. An adjacent-channel leakage feedback control circuit can detect the output signal at the output of the multi-stage power amplifier and reduce adjacent-channel leakage in the output signal over an output power range based on the detected output signal.
    Type: Application
    Filed: May 7, 2010
    Publication date: September 2, 2010
    Inventors: Ikuroh Ichitsubo, Masaya Kuwano, Koshiro Matsumoto
  • Patent number: 7769355
    Abstract: A substantially rectangular shaped power amplifier module includes a power amplifier for amplifying radio frequency signals, a bias control terminal and a power sensing terminal disposed on the same side of the power amplifier module, an input terminal and a ground terminal disposed on the same side of the power amplifier module, and an output terminal and one or more power supply terminals disposed on the same side of the power amplifier module.
    Type: Grant
    Filed: June 14, 2005
    Date of Patent: August 3, 2010
    Assignee: Micro Mobio Corporation
    Inventors: Ikuroh Ichitsubo, Kanya Kubota, Wen Chung Liu
  • Patent number: 7741710
    Abstract: Systems and methods are disclosed for a device having one or more power amplifier and/or LNA circuits positioned on the amplifier module.
    Type: Grant
    Filed: July 2, 2005
    Date of Patent: June 22, 2010
    Assignee: Micro Mobio Corporation
    Inventors: Ikuroh Ichitsubo, Guan-Wu Wang, Weiping Wang
  • Patent number: 7741904
    Abstract: A linear amplifier circuit includes a first matching circuit that receives a first signal and to produce a first impedance matched signal, a first power amplifier that produces a first amplified signal in response to the first impedance matched signal under the control of a first bias signal, a second power amplifier that produces a second amplified signal in response to the first impedance matched signal under the control of a second bias signal, a biasing circuit that produces the first bias signal and the second bias signal. The first power amplifier can be activated by the first biasing signal when the power of the output signal is to exceed a first threshold value. The second power amplifier can be activated by the second biasing signal when the power of the output signal is below a second threshold value. A second matching circuit configured to receive the first amplified signal and the second amplified signal, and to produce an output signal.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: June 22, 2010
    Assignee: Micro Mobio Corporation
    Inventors: Ikuroh Ichitsubo, Masaya Kuwano, Koshiro Matsumoto
  • Publication number: 20100109778
    Abstract: A broad-band linear amplifier circuit includes a driver amplifier to produce a first amplified radio frequency (RF) signal in a first single RF band in response to a first input RF signal and to produce a second amplified RF signal in a second single RF band in response to a second input RF signal. The first single RF band and the second single RF band reside in a broad band that has a bandwidth more than two times a bandwidth of the first single RF band or the second single RF band. A sensing circuit can sense a power, a gain, or a phase of the first output RF signal and the second output RF signal, and to produce a sensing signal. A gain control circuit controls gain variation of the driver amplifier in response to the sensing signal.
    Type: Application
    Filed: October 31, 2008
    Publication date: May 6, 2010
    Inventors: Ikuroh Ichitsubo, Brian Michael Wang