ALEXANDRIA, Va., June 10 -- United States Patent no. 12,292,329, issued on May 6, was assigned to Cisco Technology Inc. (San Jose, Calif.).

"Receiver photodiode biasing circuit" was invented by Gianlorenzo Masini (Carlsbad, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure describes an optical system that uses a source optical signal to bias a receiver photodiode. The system includes an optical source, a receiver photodiode, a first biasing photodiode, a variable optical attenuator, and a compensation photodiode. The optical source produces a first optical signal. The receiver photodiode converts a second optical signal into an electrical signal. The first biasing photodiode genera...