Patents by Inventor Yukio Morishita

Yukio Morishita 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).

  • Noise canceling device, weighing device, method of canceling a noise, and method of designing a digital filter
    Patent number: 8392493
    Abstract: It is an object of the present invention to provide techniques which allow for easier change in filter characteristics of a digital filter. Then, in order to attain this object, in a weighing device according to the present invention, a filter coefficient calculator (6) calculates a filter coefficient using a predetermined mathematical expression and outputs the result to a signal processor (5). The signal processor (5) carries out a filtering process on a weight signal (DS) of a digital signal using the filter coefficient. The mathematical expression includes a first parameter which specifies an amount of attenuation in at least one attenuation band where attenuation should be locally intensified in a stopband of amplitude characteristics of the filtering process, a second parameter which specifies the band position of the at least one attenuation band, and a third parameter which specifies a starting frequency of the stopband.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: March 5, 2013
    Assignee: Ishida Co., Ltd.
    Inventors: Naoyuki Aikawa, Yukio Morishita
  • NOISE CANCELING DEVICE, WEIGHING DEVICE, METHOD OF CANCELING A NOISE, AND METHOD OF DESIGNING A DIGITAL FILTER
    Publication number: 20090125575
    Abstract: It is an object of the present invention to provide techniques which allow for easier change in filter characteristics of a digital filter. Then, in order to attain this object, in a weighing device according to the present invention, a filter coefficient calculator (6) calculates a filter coefficient using a predetermined mathematical expression and outputs the result to a signal processor (5). The signal processor (5) carries out a filtering process on a weight signal (DS) of a digital signal using the filter coefficient. The mathematical expression includes a first parameter which specifies an amount of attenuation in at least one attenuation band where attenuation should be locally intensified in a stopband of amplitude characteristics of the filtering process, a second parameter which specifies the band position of the at least one attenuation band, and a third parameter which specifies a starting frequency of the stopband.
    Type: Application
    Filed: January 18, 2008
    Publication date: May 14, 2009
    Inventors: Naoyuki Aikawa, Yukio Morishita