Patent ID: 9000860
Filing Date: 2015-04-07
Classification: H04B,H04L

Abstract:
1. A circuit for a low-loss electrical balance duplexer (EBD) with noise cancellation, the circuit comprising: an EBD circuit coupled to one or more output nodes of a transmit (TX) path, an antenna, and one or more input nodes of a receive (RX) path, the EBD circuit being configured to isolate the TX path from the RX path, and to provide low-loss signal paths between the one or more output nodes of the TX path and the antenna; a balancing network coupled to the EBD circuit and configured to provide an impedance that matches an impedance associated with the antenna; and a noise cancellation circuit configured to sense a noise signal generated by the balancing network, and to use the sensed noise signal to improve a signal-to-noise ratio (SNR) of the RX path.