Patent ID: 7436787
Filing Date: 2008-10-14
Classification: H04B

Abstract:
1. A transceiver in a full duplex communication system, the transceiver comprising: a transmitting circuit coupled to a channel for transmitting a transmit signal to the channel; a cancellation signal generator coupled to the channel for generating a cancellation signal according to the transmit signal, wherein the cancellation signal corresponds to the transmit signal; a phase adjusting circuit coupled to the transmitting circuit and the cancellation signal generator for adjusting the phase of the cancellation signal, comprising: an echo residue detector coupled to the echo cancellation circuit for detecting an echo residue and generating a control signal according to the echo residue to control the switches of the capacitor module; and an echo cancellation circuit coupled to the transmitting circuit and the cancellation signal generator for attenuating an echo corresponding to the transmit signal with the cancellation signal.