Taktfehlerschätzung für eine Elektronische Zweitaktvorrichtung

Details

Veröffentlichungs-Nr.

EP3866019

Aktenzeichen

EP20305147

Anmeldetag

17. Februar 2020

Veröffentlichung

1. Januar 2025

Erteilung

1. Januar 2025

Rechtsraum

EP

IPC

G06F13/42H04W56/00

Abstract

A method is disclosed for deriving an estimation value of a clock-error (E) for a slave clock (3), wherein the slave clock (3) is set at a nominal slave period (TLCLK_n) and outputs a sequence of slave clock signals (3') at an actual slave period (TLCLK) and wherein the difference between the actual slave period (TLCLK) and the nominal slave period (TLCLK_n) is approximated by the estimation value of the clock-error (E). The method includes:- receiving a sequence of master clock signals (5') at a master period (THCLK) that is output from a master clock (5), and a sequence of slave clock signals (3') at an actual slave period (TLCLK) that is output from the slave clock (3),- providing a measurement time period (43) that begins at a starting time point (43_s) and ends at an ending time point (43_e), wherein the measurement time period (43) includes a common multiple time period, the common multiple time period ends at the ending time point (43_e) and has a length in time that is a first multiple (n) of the nominal slave period (TLCLK_n) and is a second multiple (m) of the master period (THCLK),- providing a sequence of storing time points (43_i) temporally displaced within the common multiple time period by the actual slave period (TLCLK), the last of the storing time points being the ending time point (43_e) of the measurement time period (43),- starting to count the slave signals (3') and the master signals (5') at the starting time point (43_s),- for more than one storing time point (43_i), storing a master count value that represents the counted master signals (5') in association with the respective storing time point (43_i),- deriving an actual master count sum value by adding the stored master count values,- deriving, for the more than one storing time points, a nominal master count sum value, and- deriving the estimation of the clock-error (E) for the slave clock (3) by relating the actual master count sum value to the nominal count sum value.

Anmelder

Firmen

STMicroelectronics (Grenoble 2) SAS
Be Spoon

Land

🇫🇷 Frankreich

Fachgebiete