本文研究了有源功率因数校正技术中的临界导通模式的基本原理，并对其中的电压基准源和模拟乘法器做了详细的分析和设计。

In this paper, we studied on critical current mode active Power Factor Correction technology, and did a detailed analysis and design on voltage reference circuit and analog multiplier circuit.

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内部的功率因数校正（PFC）电路以临界导通模式（CCM）工作，可获得高功率因数、低总谐波失真（THD）及直流电压调整。

PFC circuitry operates in critical conduction mode(CCM)and provides for high PF, low THD and DC bus regulation.

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