Patents by Inventor Taichi Ohtaka

Taichi Ohtaka 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: 7760119
    Abstract: The purpose is to provide a waveform generator that generates signals with a frequency lower than the minimum sampling frequency of the DAC. In the waveform generator 10, the clock generator 106 generates a clock signal 140. The frequency divider 112 divides the frequency of the clock signal 140 and generates the frequency-divided clock signal 144. The reader 118 provides an address signal at the period of frequency-divided clock signal 144 for the waveform memory 120 and reads the pattern data from the waveform memory 120 into the DAC 130. The DAC 130 converts the data provided from the waveform generator 120 at the period of clock signal 140 into an analog value and outputs a waveform of arbitrary shape.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: July 20, 2010
    Assignee: Advantest Corporation
    Inventor: Taichi Ohtaka
  • Publication number: 20080246641
    Abstract: The purpose is to provide a waveform generator that generates signals with a frequency lower than the minimum sampling frequency of the DAC. In the waveform generator 10, the clock generator 106 generates a clock signal 140. The frequency divider 112 divides the frequency of the clock signal 140 and generates the frequency-divided clock signal 144. The reader 118 provides an address signal at the period of frequency-divided clock signal 144 for the waveform memory 120 and reads the pattern data from the waveform memory 120 into the DAC 130. The DAC 130 converts the data provided from the waveform generator 120 at the period of clock signal 140 into an analog value and outputs a waveform of arbitrary shape.
    Type: Application
    Filed: March 19, 2008
    Publication date: October 9, 2008
    Inventor: Taichi Ohtaka