Patents by Inventor Kohji Fukuhara

Kohji Fukuhara 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).

  • Plural delta-sigma converters operating in parallel with independent dither generators
    Patent number: 5073777
    Abstract: The invention is structured to add each output signal of a plurality of signal converters connected in parallel, after a common signal is inputted to and quantized in the above plurality of signal converters, having a noise generators which input noise generated utilizing random variables unrelated to each other to respective quantizers within the above plurality of signal converters, so that quantization noise, Q, or the like can be effectively averaged, and a highly reliable signal conversion device, which can ensure an enough dynamic range across a wide frequency region, can be provided.Also, the invention is structured to add each output signal of a plurality of signal converters connected in parallel, after a common input signal is inputted to and quantized in the above plurality of signal converters, so that a highly reliable signal conversion device similar to the above can be provided.
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: December 17, 1991
    Assignee: Texas Instruments Incorporated
    Inventors: Kohji Fukuhara, Yoshio Yamasaki