Patents by Inventor Kiyomitsu Oncodera

Kiyomitsu Oncodera 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).

  • VECTOR SUM PHASE SHIFTER, OPTICAL TRANSCEIVER, AND CONTROL CIRCUIT
    Publication number: 20110150495
    Abstract: A vector sum phase shifter includes a 90° phase shifter (1) which generates an in-phase signal (VINI) and a quadrature signal (VINQ) from an input signal (VIN), a four-quadrant multiplier (2I) which changes the amplitude of the in-phase signal (VINI) based on a control signal (CI), a four-quadrant multiplier (2Q) which changes the amplitude of the quadrature signal (VINQ) based on a control signal (CQ), a combiner (3) which combines the in-phase signal (VINI) and the quadrature signal (VINQ), and a control circuit (4). The control circuit (4) includes a voltage generator which generates a reference voltage, and a differential amplifier which outputs the difference signal between a control voltage (VC) and the reference voltage as the control signal (CI, CQ). The differential amplifier performs an analog operation of converting the control voltage (VC) into the control signal (CI, CQ) similar to a sine wave or a cosine wave.
    Type: Application
    Filed: August 12, 2009
    Publication date: June 23, 2011
    Inventors: Hideyuki Nosaka, Munehiko Nagatani, Shogo Yamanaka, Kimikazu Sano, Koichi Murata, Kiyomitsu Oncodera, Takatomo Enoki