The operating principle and performance of fractional-N phase locked loop (FNPLL) are described in detail, and the methods of suppressing FNPLL phase modulation sideband are introduced.

较详细介绍了分数分频锁相环的工作原理和特性，以及抑制分数分频锁相环相位调制边带的方法。

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Under a tentative peace deal, al-Bashir agreed in November to a three-phase U.N. plan to strengthen the overstretched, 7, 000-strong African Union force in Darfur.

NPR: U.S. Stiffens Sanctions on Sudan over Darfur