Apple Inc.
High dynamic range NFC reader mode receiver

Abstract:

A transceiver that implements a high dynamic range NFC reader mode receiver may include a transmitter circuit to generate a transmit (TX) signal for communication to a first device via an antenna. The transceiver may further include a receiver circuit that is in communication with the first device via the antenna. The receiver circuit includes a mixer circuit and an adder circuit. The mixer circuit mixes a carrier signal with a first signal to generate a baseband signal. The adder circuit is coupled to the antenna and produces the first signal by adding a receive (RX) signal with a second signal to reduce a component of the TX signal included in the RX signal. The second signal is produced by processing a TX clock signal generated by the transmitter circuit.