Patents by Inventor Jiro Aiba

Jiro Aiba 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).

  • Semiconductor amplifier
    Patent number: 4309666
    Abstract: The present amplifier has a pair of semiconductor amplifiers, and the input signal is divided to said amplifiers, the outputs of which are combined together by the power combiner. At least one of the power divider and the power combiner has a plurality of circulators which have three terminals. The characteristic impedance of one terminal is 2Z.sub.O and that of another terminals is Z.sub.O. Thus, by connecting the terminals of the characteristic impedance 2Z.sub.O of two circulators, the resultant characteristic impedance Z.sub.O is obtained and can be connected to an external circuit directly.The present amplifier can be utilized in particular in VHF or higher frequency band.
    Type: Grant
    Filed: August 17, 1978
    Date of Patent: January 5, 1982
    Assignee: TDK Electronics Co., Ltd.
    Inventors: Toshimasa Ito, Jiro Aiba