Invention Grant
- Patent Title: Synchronization method of an active load modulation clock within a transponder
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Application No.: US16156155Application Date: 2018-10-10
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Publication No.: US10608854B2Publication Date: 2020-03-31
- Inventor: Maksimiljan Stiglic , Kosta Kovacic
- Applicant: STMicroelectronics razvoj polprevodnikov d.o.o.
- Applicant Address: SI Ljubljana
- Assignee: STMICROELECTRONICS RAZVOJ POLPREVODNIKOV D.O.O.
- Current Assignee: STMICROELECTRONICS RAZVOJ POLPREVODNIKOV D.O.O.
- Current Assignee Address: SI Ljubljana
- Agency: Slater Matsil, LLP
- Priority: EP17169020 20170502
- Main IPC: H03C5/00
- IPC: H03C5/00 ; H04L27/20 ; H04B5/00 ; G06K19/07 ; H04L27/04 ; H04L27/36

Abstract:
A method of wireless communication includes transmitting frames from a transponder to a reader and synchronizing between a reader carrier frequency and an active load modulation (ALM) carrier frequency within each transmitted frame. Each transmitted frame includes ALM carrier bursts generated from subcarrier modulation by binary phase shift keying (BPSK) data encoding and producing signal oscillations at a transponder antenna after each ALM carrier burst generation, The synchronizing occurs at each phase change of the data encoding when no burst is generated during a half period of the subcarrier preceding the phase change and a half period of the subcarrier following this phase change. The transponder antenna has a moderate quality factor sufficient to naturally damp the signal oscillations so that the synchronizing is performed without performing any controlled signal oscillations damping.
Public/Granted literature
- US20190044770A1 SYNCHRONIZATION METHOD OF AN ACTIVE LOAD MODULATION CLOCK WITHIN A TRANSPONDER Public/Granted day:2019-02-07
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