Patent ID: 8725088
Filing Date: 2014-05-13
Classification: G06K,H01Q,H04B

Abstract:
1. A circuit comprising: a first transceiver block to generate a first transmit signal to be transmitted using radiative techniques: a second transceiver block to generate a second transmit signal to be transmitted using inductive coupling; a single antenna coupled to the first transceiver block and the second transceiver block for transmitting the first transmit signal using radiative techniques and the second transmit signal using inductive coupling; wherein the first transceiver block operates according to frequency modulation (FM) techniques, the first transmit signal being a frequency modulated signal (FM) at radio frequency (RF), and the second transceiver block operates according to near-field communication (NFC) techniques, the second transmit signal being a NFC signal at a final frequency; wherein the first transceiver block is designed to process an FM signal received from the single antenna by radiative coupling, and wherein the second transceiver is designed to process a NFC signal received from the single antenna by inductive coupling; wherein the first transceiver block and the second transceiver block operate to transmit or receive corresponding signals in a time division multiplexed (TDM) manner, the circuit further comprising a first coupling circuit and a second coupling circuit; wherein the first coupling circuit operates to couple the first transceiver block to the single antenna, while isolating the single antenna from the second transceiver block during a time interval when the first transceiver block is operational; and wherein the second coupling circuit operates to couple the second transceiver block to the single antenna, while isolating the single antenna from the first transceiver block during a time interval when the second transceiver block is operational.