The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2025
Filed:
Dec. 01, 2023
Stmicroelectronics International N.v., Geneva, CH;
Lionel Cimaz, Pleumeleuc, FR;
Denis Michael Flores Pazos, Grenoble, FR;
STMicroelectronics International N.V., Geneva, CH;
Abstract
A fractional frequency synthesizer, a fractional PLL, and a method for generating a fractional frequency signal based on a reference signal are provided. An example fractional frequency synthesizer includes a multi-phase clock generator configured to generate a clock vector comprising a plurality of clock signals, each oscillating according to a fractional frequency in relation to the reference frequency and each clock signal offset by a phase offset. The fractional frequency synthesizer includes multi-phase divider circuitry configured to select a clock signal from the clock vector to generate a fractional frequency feedback signal. An accumulator configured to increment a count and a rollover detector configured to determine a rollover value associated with a rollover event on the accumulator are further included. A clock signal is selected based on the rollover value and the fractional frequency feedback signal is generated based at least in part on the selected clock signal.