ALEXANDRIA, Va., July 21 -- United States Patent no. 12,689,445, issued on July 21, was assigned to NTT INC. (Tokyo).
"Analog-digital conversion method and analog-digital converter" was invented by Shota Kita (Tokyo), Masaya Notomi (Tokyo), Kengo Nozaki (Tokyo) and Akihiko Shinya (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "An analog-digital conversion method according to the present invention is a method for converting an optical analog signal into an electrical digital signal, the method including: performing at least one of affine transformation with first reference light and homodyne detection with a detection axis of second reference light on the optical analog signal; converting the optical an...