Patents by Inventor Masayuki Ohnuki

Masayuki Ohnuki 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).

  • Signal quality detector circuit
    Patent number: 5216697
    Abstract: A signal quality detector circuit which detects an error signal of an input signal, used for detecting transmission quality of a transmission line. The detector circuit equalizes the input baseband signal, analog-to-digital-converts the equalized signal to a digital bit signal, analog-to-digital converts the input baseband signal to a digital bit signal, compares the two analog-to-digital converted signals on a bit-by-bit basis and detects an error signal accumulates the error signal in a unit time, and detects transmission quality of a transmission line.
    Type: Grant
    Filed: August 14, 1990
    Date of Patent: June 1, 1993
    Assignee: Fujitsu Limited
    Inventor: Masayuki Ohnuki