Invention Grant
- Patent Title: RF front end module and near field communication device
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Application No.: US15621286Application Date: 2017-06-13
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Publication No.: US10200091B2Publication Date: 2019-02-05
- Inventor: Jingfeng Ding , Gernot Hueber , Ian Thomas Macnamara
- Applicant: NXP B.V.
- Applicant Address: NL Eindhoven
- Assignee: NXP B.V.
- Current Assignee: NXP B.V.
- Current Assignee Address: NL Eindhoven
- Main IPC: H04B5/00
- IPC: H04B5/00 ; H04W88/06

Abstract:
A device for inductively coupled communications includes an NFC module for generating an electromagnetic carrier signal and modulating the carrier signal according to data to be transmitted, and an antenna circuit coupled to and driven by said NFC module with the modulated carrier signal. The device includes an RF front end coupled between said NFC module and said antenna circuit. The RF front end includes a balanced to unbalanced (Balun) transformer and a tuning capacitor. The Balun transformer has a first winding coupled to said NFC module via differential transmitter terminals of said NFC module and a second winding coupled to said tuning capacitor. A first terminal of said tuning capacitor is coupled to a receiving terminal of said NFC module. The Balun transformer and tuning capacitor provide a function of an electromagnetic compatibility (EMC) filter.
Public/Granted literature
- US20180359005A1 RF FRONT END MODULE AND NEAR FIELD COMMUNICATION DEVICE Public/Granted day:2018-12-13
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