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51. 发明申请

US20080191811A1 Real time VCO gain non linearity calibration 有权
标题翻译：实时VCO获得非线性校准
公开(公告)号：US20080191811A1
公开(公告)日：2008-08-14
申请号：US11704881
申请日：2007-02-08
申请人： Paul Cheng-Po Liang
发明人： Paul Cheng-Po Liang
IPC分类号： H03C3/08 , G01R23/00
CPC分类号： H03C3/0966 , H03C3/0991 , H03L7/08 , H03L2207/06
摘要： A method of determining a gain nonlinearity receives a phase difference and generates an output frequency based on the received phase difference. The method reconstructs a waveform by using the output frequency. The method preprocesses the phase difference to generate a comparison waveform. The method compares the reconstructed waveform to the comparison waveform and determines a gain nonlinearity based on the comparison between the reconstructed and comparison waveforms. A modulation system includes a voltage controlled oscillator for receiving an input signal based on a phase difference and generating an output frequency. The system further includes a waveform reconstructor and a comparator. The waveform reconstructor is coupled to the voltage controlled oscillator, and is for reconstructing a waveform based on the output frequency. The comparator is coupled to the waveform reconstructor, and is for comparing the output of the waveform reconstructor with the input signal. The comparator is configured for determining a gain nonlinearity exhibited by the voltage controlled oscillator. Particular embodiments further include a compensator.
摘要翻译：确定增益非线性的方法接收相位差，并基于接收的相位差产生输出频率。该方法通过使用输出频率重建波形。该方法预处理相位差以产生比较波形。该方法将重建波形与比较波形进行比较，并基于重构和比较波形之间的比较确定增益非线性。调制系统包括压控振荡器，用于基于相位差接收输入信号并产生输出频率。该系统还包括波形重构器和比较器。波形重建器耦合到压控振荡器，并用于基于输出频率重建波形。比较器耦合到波形重建器，用于将波形重构器的输出与输入信号进行比较。比较器被配置用于确定由压控振荡器显示的增益非线性。具体实施例还包括补偿器。

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