发明名称 |
Circuit and method for reducing local oscillator frequency transmission in a radio transceiver |
摘要 |
A circuit and method for reducing local oscillator frequency transmission in a homodyne, or direct conversion, radio transceiver using I/Q modulation/demodulation minimizes local oscillator leakage to the antenna and its subsequent reception by the receiver by interfacing I/Q input signals to the modulator in a controlled manner so as to increase isolation during reception by presenting high impedance states to the I/Q modulator input terminals during reception thereby nulling the carrier during reception.
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申请公布号 |
US2001053671(A1) |
申请公布日期 |
2001.12.20 |
申请号 |
US20010851046 |
申请日期 |
2001.05.08 |
申请人 |
MOTOROLA, INC. |
发明人 |
FRIEDLANDER HAIM;SHIRAZI GADI;DELLON JON |
分类号 |
H04B1/30;H04B15/06;(IPC1-7):H04B1/44 |
主分类号 |
H04B1/30 |
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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