发明名称 |
INTEGRATED CIRCUIT, TRANSCEIVER AND METHOD FOR LEAKAGE CANCELLATION IN A RECEIVE PATH |
摘要 |
An integrated circuit for cancelling a radio frequency transmit leakage signal comprises: a transmitter portion comprising at least one amplifier stage for transmitting a radio frequency signal to an antenna port; and a first coupler arranged to operably couple the transmitter portion, the antenna port and a receiver portion. The receiver portion is arranged to receive a first composite signal that comprises a received radio frequency signal from the antenna port and the transmit leakage signal. The receiver portion comprises: a first down-conversion circuit arranged to receive the first composite signal and a local oscillator signal such that the first down-conversion circuit outputs a down-converted composite signal at a first intermediate frequency signal; and a second coupler arranged to receive the down-converted first composite signal at the first intermediate frequency signal and a phase shifted version of the local oscillator signal such that the phase shifted version of the local oscillator signal is arranged to cancel at least a portion of the transmit leakage signal from the down-converted first composite signal. |
申请公布号 |
US2012112956(A1) |
申请公布日期 |
2012.05.10 |
申请号 |
US200913382789 |
申请日期 |
2009.07.16 |
申请人 |
TROTTA SAVERIO;DEHLINK BERNHARD;REUTER RALF;FREESCALE SEMICONDUCTOR, INC. |
发明人 |
TROTTA SAVERIO;DEHLINK BERNHARD;REUTER RALF |
分类号 |
G01S7/40 |
主分类号 |
G01S7/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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