| 摘要 |
A multiplier and a power factor correction circuit using the multiplier. The multiplier comprises a Gilbert multiplier circuit, comprising a first differential input stage, a second differential input stage and an output stage; a first differential voltage conversion circuit; a second differential voltage conversion circuit; and a bias current generation circuit, wherein the output stage comprises a current mirror unit, comprising two current input ends and a current output end; and a feedback control unit used for guaranteeing that there is no current output from the current output end when the difference between voltage signals received by the multiplier is zero, thereby being beneficial to improving the linearity of the multiplier and the accuracy of an output current of the multiplier. |
