Invention Grant
- Patent Title: Radio-frequency identification transponder and method for sending a radio-frequency identification message
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Application No.: US15473074Application Date: 2017-03-29
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Publication No.: US10049237B2Publication Date: 2018-08-14
- Inventor: Kosta Kovacic , Albin Pevec , Maksimiljan Stiglic
- Applicant: STMicroelectronics International N.V
- Applicant Address: NL Schiphol
- Assignee: STMicroelectronics International N.V.
- Current Assignee: STMicroelectronics International N.V.
- Current Assignee Address: NL Schiphol
- Agency: Slater Matsil, LLP
- Priority: EP16165320 20160414
- Main IPC: G06K7/10
- IPC: G06K7/10 ; G06K19/07

Abstract:
Embodiments provide a method for sending a message from an RFID transponder to a reader during a transmission frame using active load modulation, the method comprising. An encoded bit signal has a first logic level during first time segments within the transmission frame and a second logic level during second time segments within the transmission frame. The first time segments include an initial time segment of the transmission frame. A transmission signal is generated based on the encoded bit signal. The transmission signal is generated having a first phase depending on the first logic level during the first time segments, a second phase depending on the second logic level during the second time segments, and the second phase during a time interval preceding the transmission frame.
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