US Patent Issued to Instituto de Pesquisas Eldorado on June 2 for "PLL lock detector circuit" (Brazilian Inventors)

ALEXANDRIA, Va., June 2 -- United States Patent no. 12,647,120, issued on June 2, was assigned to Instituto de Pesquisas Eldorado (Campinas, Brazil).

"PLL lock detector circuit" was invented by Mateus Biancarde Castro (Campinas, Brazil) and Eduardo Rodrigues de Lima (Campinas, Brazil).

According to the abstract* released by the U.S. Patent & Trademark Office: "A lock-detection circuit designed for integration into a phase-locked loop or a delay-locked loop includes a first signal-duration filter processing an up signal (UP) to generate a filtered UP signal containing segments that exceed a minimum duration, and a second signal-duration filter handling a down signal (DN) to produce a filtered DN signal with segments surpassing the minimum ...