US 11,899,407 B2
Real time clock integrated module and device implementing such a module
Brent Abbott, New York, NY (US); Hervé Echelard, Bures sur Yvette (FR); and Paul Edward Myers, New York, NY (US)
Assigned to OROLIA DEFENSE & SECURITY LLC, Rochester, NY (US)
Filed by OROLIA DEFENSE & SECURITY LLC, Rochester, NY (US)
Filed on Jul. 29, 2022, as Appl. No. 17/876,725.
Claims priority of application No. 21189684 (EP), filed on Aug. 4, 2021.
Prior Publication US 2023/0039814 A1, Feb. 9, 2023
Int. Cl. G04F 5/14 (2006.01)
CPC G04F 5/14 (2013.01) 9 Claims
OG exemplary drawing
 
1. A device implementing a real time clock integrated module for outputting data indicating a time-of-day and suitable for use in the device, said real time clock integrated module comprising:
a high-precision oscillator or atomic clock having an accuracy of 50 ppb (parts per billion) or better;
a timing circuit configured to generate time-of-day data according to a clock signal outputted from said high-precision oscillator or atomic clock; and
a primary power source or a connection for connecting to a primary power source to provide power to the timing circuit when the device is powered up; and
a back-up power source configured to allow the timing circuit to maintain time when the device in which the real time clock integrated module is implemented is powered off;
said timing circuit comprising a real time clock and a logic device storing a timestamp, said timing circuit being configured to, when the device is powered off, update the timestamp value based on the high-precision oscillator or atomic clock and generate a time reference signal, said timing circuit being also configured to provide to the device said updated timestamp value and said time reference signal that the device can use as a time reference to reinitialize a timing system of the device once the device is powered up again.