US Patent Issued to Silicon Laboratories on Jan. 27 for "Charge injection reduction in a fractional-N frequency synthesizer" (Singaporean Inventors)

ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,537,532, issued on Jan. 27, was assigned to Silicon Laboratories Inc. (Austin, Texas).

"Charge injection reduction in a fractional-N frequency synthesizer" was invented by Yun Da Bryan Seah (Singapore), Hua Beng Chan (Singapore) and Tak Ying Wong (Singapore).

According to the abstract* released by the U.S. Patent & Trademark Office: "A technique for reducing the effects of charge injection when a charge pump in a fractional-N frequency synthesizer switches from an error cancellation phase of error current generation to a full-scale phase of error current generation uses a dummy digital-to-analog converter to steer excess current from the error cancellation phase to a voltage regulate...