Near field communication circuit and payment terminal

Abstract

Near field communication circuit and payment terminal are disclosed. The circuit comprises: a first type of near field communication chip for outputting a first differential signal and a second differential signal; a second type of near field communication chip for outputting a third differential signal and a fourth differential signal; a first radio frequency switch for receiving the first differential signal, the third differential signal and a control signal, and selecting the first differential signal or the third differential signal as a first output signal based on the control signal; a second radio frequency switch for receiving the second differential signal, the fourth differential signal and the control signal, and selecting the second differential signal or the fourth differential signal as a second output signal based on the control signal; and a near field communication antenna module for receiving the first output signal and the second output signal to realize communication between the two types of near field communication chips and an external near field communication device. The circuit makes different types of near field communication chips share the same antenna, reduces hardware cost and improves the integration and compatibility of the payment terminal.

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