Patents by Inventor Yasunobu Kamikubo

Yasunobu Kamikubo 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).

  • PLL synthesizer apparatus
    Patent number: 6094100
    Abstract: Disclosed herein is a fractional N-type PLL frequency synthesizer apparatus. A fractional N-type control circuit employed therein for varying N values for each reference cycle is constructed of a combination of a frequency divider (comprising D flip-flops) and a logic circuit (comprising an exclusive OR circuit, AND circuits and an OR circuit), taking the timing provided to output a carry signal into consideration in advance. Owing to such a construction, the fractional N-type PLL frequency synthesizer apparatus can be activated with low noise and can provide a short lockup time.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: July 25, 2000
    Assignee: Sony Corporation
    Inventors: Yasunobu Kamikubo, Masanobu Onizuka
  • Receiving apparatus and decoder
    Patent number: 5905763
    Abstract: In an FSK receiving apparatus, a quadrature FSK-modulated signal is received at an I/F unit and demodulated, the state of the frequency eccentricity is detected at a comparator, and the signal as the result thereof is input to a decoder.
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: May 18, 1999
    Assignee: Sony Corporation
    Inventor: Yasunobu Kamikubo
  • PLL synthesizer apparatus
    Patent number: 5892405
    Abstract: Disclosed herein is a fractional N-type PLL frequency synthesizer apparatus. A fractional N-type control circuit employed therein for varying N values for each reference cycle is constructed of a combination of a frequency divider (comprising D flip-flops) and a logic circuit (comprising an exclusive OR circuit, AND circuits and an OR circuit), taking the timing provided to output a carry signal into consideration in advance. Owing to such a construction, the fractional N-type PLL frequency synthesizer apparatus can be activated with low noise and can provide a short lockup time.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: April 6, 1999
    Assignee: Sony Corporation
    Inventors: Yasunobu Kamikubo, Masanobu Onizuka