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:
Jul. 17, 2012
Filed:
Mar. 20, 2009
Jay Richard Lory, Chandler, AZ (US);
Alma Stephenson Anderson, Chandler, AZ (US);
Jay Richard Lory, Chandler, AZ (US);
Alma Stephenson Anderson, Chandler, AZ (US);
NXP B.V., Eindhoven, NL;
Abstract
A system and method for synchronizing otherwise independent oscillators private to IC Bus slave devices. An IC Bus master device can issue two new general call commands, CALIBRATE and ZERO COUNTERS. The IC Bus slave devices respond to the CALIBRATE command by counting the number of cycles its local, private oscillator makes through during the communication transfer period of the CALIBRATE command on the IC Bus. All such IC Bus slave devices measure the same communication transfer period on the IC Bus, so the differences in the digital measurements obtained by each of them are proportional to their respective oscillator frequencies. The digital measurements are privately used by each IC Bus slave device to calculate appropriate oscillator prescale factors, and to automatically load the values that will harmonize the final product frequencies of all of the local oscillators on all of the IC Bus slave devices in the system.