Patents by Inventor Tomoaki Nonaka

Tomoaki Nonaka 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).

  • Frequency spectrum analyzer having time domain analysis function
    Patent number: 6233529
    Abstract: A spectrum analyzer is provided with a continuous period measurement function which continuously measures time periods of each and every cycle of an IF signal to analyze changes in frequency and time period of an input signal in a time domain. The frequency spectrum analyzer having a sweep local oscillator includes a continuous period measurement block for continuously measuring each time period of an IF signal produced by mixing the input signal and the local oscillator signal, and a processor and display for processing the data representing the continuous time period produced by the continuous period measurement block to analyze the input signal in the time domain.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: May 15, 2001
    Assignee: Advantest Corp.
    Inventor: Tomoaki Nonaka