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. 17, 2020
Filed:
Jan. 17, 2019
Stmicroelectronics SA, Montrouge, FR;
Marc Houdebine, Crolles, FR;
STMICROELECTRONICS SA, Montrouge, FR;
Abstract
Data frames, including bursts of an active load modulation (ALM) carrier signal generated from a modulation of an underlying carrier, are transmitted from an object to a reader. Synchronizing a reader carrier signal and the ALM carrier signal includes: prior to transmission of each data frame and between some of the bursts of the ALM carrier signal of each data frame, performing a closed-loop control of an output signal of a main oscillator onto a phase and a frequency of the reader carrier signal; estimating a ratio between a frequency of the output signal of the main oscillator and a frequency of a reference signal produced by a reference oscillator; and during each burst of the ALM carrier signal of each data frame, performing a closed-loop control in frequency only of the output signal of the main oscillator onto the reference frequency of the reference signal corrected by the ratio.