US Patent Issued to Silicon Laboratories on Feb. 10 for "Ring oscillator based digitally controlled oscillator" (Singaporean, American Inventors)

ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,549,158, issued on Feb. 10, was assigned to Silicon Laboratories Inc. (Austin, Texas).

"Ring oscillator based digitally controlled oscillator" was invented by Sheng Jue Peh (Singapore) and Jeffrey L. Sonntag (Weaverville, N.C.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A ring oscillator has a first group of inverters that receive respective frequency control signals to control delays through the inverters. The frequency of the ring oscillator is dithered according to least significant bits of a frequency control word supplied by a loop filter of a phase-locked loop. Most significant bits of the frequency control word are used to generate the frequen...