Patents by Inventor Yoichi Sakaue

Yoichi Sakaue 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: 10788660
    Abstract: An optical scanning device includes an optical scanner including a mirror that includes a light reflection surface, a driving source that causes the mirror to rotate around a rotation axis passing through the center of the light reflection surface in response to a driving signal, and a piezoelectric sensor that outputs a sensor signal corresponding to a rotational angle of the mirror around the rotation axis; and an impedance conversion circuit that receives the sensor signal from the piezoelectric sensor, performs impedance conversion on the received sensor signal, and outputs the impedance-converted sensor signal.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: September 29, 2020
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yoichi Sakaue, Takahiko Nishiyama
  • Publication number: 20190072757
    Abstract: An optical scanning device includes an optical scanner including a mirror that includes a light reflection surface, a driving source that causes the mirror to rotate around a rotation axis passing through the center of the light reflection surface in response to a driving signal, and a piezoelectric sensor that outputs a sensor signal corresponding to a rotational angle of the mirror around the rotation axis; and an impedance conversion circuit that receives the sensor signal from the piezoelectric sensor, performs impedance conversion on the received sensor signal, and outputs the impedance-converted sensor signal.
    Type: Application
    Filed: August 29, 2018
    Publication date: March 7, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yoichi SAKAUE, Takahiko NISHIYAMA
  • Patent number: 5825833
    Abstract: A digital and analog reception apparatus includes a first mixer (MIX1) which converts up a reception signal having an input frequency fa inputted into an input terminal IN and a second mixer (MIX2) which converts down a first intermediate frequency fc of a signal outputted from the first mixer (MIX1) by using a second local frequency fd and a second intermediate frequency fe. The apparatus is also provided with a phase-locked loop (PLL), an automatic frequency controller (AFC) which comprises a second local oscillator and a low frequency band pass filter unit LPF adjusts a second local frequency fd, and a microcomputer discriminates an analog/digital distinction of the reception signal having the input frequency fa. Upon receiving an analog signal, the digital and analog reception apparatus deactivates a low-pass filter unit LPF, thereby having an AFC signal control a second local oscillator.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: October 20, 1998
    Assignee: Mitsumi Electric Co., Ltd.
    Inventor: Yoichi Sakaue