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:
Oct. 13, 2015
Filed:
Aug. 25, 2014
Nxp B.v., Eindhoven, NL;
Frank Leong, Veldhoven, NL;
Andries Hekstra, Eindhoven, NL;
Arie Koppelaar, Giessen, NL;
Stefan Drude, Waalre, NL;
NXP B.V., Eindhoven, NL;
Abstract
Aspects of the present disclosure are directed to communications between devices. As consistent with one or more embodiments, a local device has a first clock, a low-frequency (LF) transmitter and a high-frequency (HF) transceiver. A remote device includes a second clock, a LF receiver and a HF transceiver. An LF signal is transmitted from the local device to the remote device and used to synchronize the second clock. The first clock is synchronized based on an HF signal transmitted to the local device using the synchronized second clock and a first predetermined time delay relative to receipt of the LF signal. The second clock is re-synchronized based on a second HF signal transmitted to the remote device using the first clock and a second predetermined time delay relative to receipt of the first HF signal, while accounting for a trip time for communicating one or both of the HF signals.