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Design of High-performance Charge-pump Circuit in PLL

WANG Zhi-liang1,BAO Zhi-hua2,CHENG Meng-zhang2(1.Southeast University,Nanjing 210096,China;2.Nantong University,Nantong 226007,China)  
The paper designs a high-performance charge-pump circuit,in which the differential inverter is used.This kind of circuit can work at a low voltage of 2 V and it has the advantages of a rapid speed,a simple structure and a low power consumption.The HSpice simulation results show that the power consumption of the designed charge-pump circuit is only 0.1 m W when the working frequency is 10 MHz and the range output voltage is about 0~2 V.The circuit can be applied to PPL with the differential inverter.
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