Abstract
This paper proposed an improved bootstrapped type high-efficient charge pump circuit based on the Dickson charge pump in order to get a higher pumping efficiency. It is not only avoid the threshold voltage drop in conventional Dickson charge pump circuits but enable them to generate a higher output voltage. Simulation by HSPICE shows that for conventional Dickson charge pump, it convert the input low DC-voltage (Vin=1.5V) up to 3.8 times of it (VOUT=5.77V), the pump efficiency was 76.93%. Our work, however, can convert the low input DC-voltage (Vin=1.5V) up near to 4.76 times of it (VOUT=7.14V), the pump efficiency can reaches as high as 95.2%.
Publisher
Trans Tech Publications, Ltd.