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    • 1. 发明申请
    • METHOD AND APPARATUS FOR MITIGATING VCO PULLING
    • 减轻VCO拉拔的方法和装置
    • WO2010014982A1
    • 2010-02-04
    • PCT/US2009/052574
    • 2009-08-03
    • QUALCOMM INCORPORATEDLANE, Mark, Vernon
    • LANE, Mark, Vernon
    • H04B1/04
    • H04B1/0475
    • Techniques for mitigating VCO pulling are described. In an aspect, VCO pulling may be mitigated by (i) injecting an oscillator signal, which is a version of a VCO signal from a VCO, into a transmitter and (ii) using coupling paths from the transmitter to the VCO to re-circulate the oscillator signal back to the VCO. In one design, an apparatus includes a VCO and a coupling circuit. The VCO generates a VCO signal at N times a desired output frequency. The coupling circuit receives an oscillator signal generated based on the VCO signal and injects the oscillator signal into a transmitter to mitigate pulling of the frequency of the VCO due to undesired coupling from the transmitter to the VCO. The apparatus may include a phase adjustment circuit that adjusts the phase of the oscillator signal and/or an amplitude adjustment circuit that adjusts the amplitude of the oscillator signal.
    • 描述了减轻VCO牵引的技术。 在一个方面,可以通过(i)将来自VCO的VCO信号的版本的振荡器信号注入到发射机中,以及(ii)使用从发射机到VCO的耦合路径来重新流通 振荡器信号回到VCO。 在一种设计中,一种装置包括VCO和耦合电路。 VCO产生N次所需输出频率的VCO信号。 耦合电路接收基于VCO信号产生的振荡器信号,并将振荡器信号注入到发射机中以减轻由于从发射机到VCO的不期望的耦合而导致的VCO的频率的拉动。 该装置可以包括调整振荡器信号的相位的相位调整电路和/或调整振荡器信号的幅度的幅度调整电路。