Because of the merit of integrated easily, low power, low jitter, small phase difference error and big capture scale, the CPPLL (Charge-pump PLL) has become one of the major digital PLL product.
电荷泵锁相环具有易于集成、低功耗、低抖动、频率牵引范围大和静态相位误差小等优点，成为了当前数字锁相环产品的主流。
A method of digital calibration in the amplitude and phase imbalances of sum and difference channels, and of angle error normalization processing is provided.
并提供了一种和差支路幅相不平衡数字校正和角误差归一化处理的方法。
Utilizing the regularity of phase difference between period signals, phase processing is made on comparison signals, which reduce effectively quantified error.
这个方法利用了周期性信号间相位差变化的规律性对比对信号进行相位处理，有效地减小了量化误差。
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