EP 2021972 A1 20090211 - NEAR FIELD RF COMMUNICATORS AND NEAR FIELD COMMUNICATIONS-ENABLED DEVICES
Title (en)
NEAR FIELD RF COMMUNICATORS AND NEAR FIELD COMMUNICATIONS-ENABLED DEVICES
Title (de)
NAHFELD-HF-KOMMUNIKATOREN UND NAHFELD-KOMMUNIKATIONSBEFÄHIGTE EINRICHTUNGEN
Title (fr)
APPAREILS DE COMMUNICATION RF EN CHAMP PROCHE ET DISPOSITIFS À COMMUNICATIONS EN CHAMP PROCHE
Publication
Application
Priority
- GB 2007001918 W 20070523
- GB 0610227 A 20060523
Abstract (en)
[origin: WO2007135434A1] A near field RF communicator has an inductive coupler (10) to enable inductive coupling with a magnetic field of an RF signal. A demodulator (102) extracts modulation from an inductively coupled magnetic field. An error amplifier (206) controls a voltage of the near field RF communicator on the basis of a comparison of a reference voltage (VREF) with a voltage (VINPUT) related to a voltage derived by a power deriver (105). A modulator (M) is provided to modulate an inductively coupled magnetic field with data to be communicated via the inductive coupling. An error amplifier controller (102A; 101) is provided to prevent operation of the error amplifier in the event of a magnetic field amplitude below a predetermined level or the presence of modulation. The near field RF communicator may be a near field RF transponder or an NFC communicator in target mode.
IPC 8 full level
G06K 7/00 (2006.01); G06K 19/077 (2006.01); H04B 5/00 (2006.01)
CPC (source: EP)
G06K 7/10237 (2013.01); G06K 19/0701 (2013.01); G06K 19/0723 (2013.01); H04B 5/45 (2024.01); H04B 5/48 (2024.01); H04B 5/26 (2024.01); H04B 5/79 (2024.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
WO 2007135434 A1 20071129; EP 2021972 A1 20090211; GB 0610227 D0 20060705
DOCDB simple family (application)
GB 2007001918 W 20070523; EP 07732939 A 20070523; GB 0610227 A 20060523