Rf front end module and near field communication device

A device for inductively coupled communications comprising:

• a near field communication (NFC) module being adapted to generate an electromagnetic carrier signal and to modulate the carrier signal according to data to be transmitted, said NFC module including a differential transmitter and a single ended receiver;
• a singled ended antenna coupled to said NFC module and driven by said NFC module with the modulated carrier signal;
• and
• an RF front end coupled between said NFC module and said antenna;
• said RF front end including a first inductor coupled to a first terminal of said differential transmitter in a first transmitting path, and a first capacitor coupled to a second terminal of said differential transmitter in a second transmitting path;
• said RF front end further including a receiving path and a second capacitor, said second capacitor arranged in parallel and connected between an input terminal of the antenna and ground;
• wherein said differential transmitter of said NFC module operates with said single ended antenna without using a balanced to unbalanced (Balun) transformer;
• wherein said first inductor, said first capacitor, and said second capacitor being adapted to provide a function of an electromagnetic compatibility (EMC) filter without a dedicated LC pair coupled to each of said first terminal of said differential transmitter and said second terminal of said differential transmitter.

A device for inductively coupled communications comprising:

• a near field communication (NFC) module being adapted to generate an electromagnetic carrier signal and to modulate the carrier signal according to data to be transmitted, said NFC module including a differential transmitter and a single ended receiver;
• a singled ended antenna coupled to said NFC module and driven by said NFC module with the modulated carrier signal;
• and
• an RF front end coupled between said NFC module and said antenna;
• said RF front end including a first inductor coupled to a first terminal of said differential transmitter in a first transmitting path, and a first capacitor coupled to a second terminal of said differential transmitter in a second transmitting path;
• said RF front end further including a receiving path and a second capacitor, said second capacitor arranged in series and connected between an interaction of the first and second transmitting paths and an input terminal of the antenna;
• wherein said differential transmitter of said NFC module operates with said single ended antenna without using a balanced to unbalanced (Balun) transformer;
• wherein said first inductor, said first capacitor, and said second capacitor being adapted to provide a function of an electromagnetic compatibility (EMC) filter without a dedicated LC pair coupled to each of said first terminal of said differential transmitter and said second terminal of said differential transmitter.