Charge Pump for DC/DC and DC/AC Conversion
Date Issued
2005
Date
2005
Author(s)
Hu, Yi-Nung
DOI
zh-TW
Abstract
Charge pump, also called switched-capacitor voltage converter, can pump the lower direct-current voltage source to the higher dc output voltage. It is widely used in some memory components like DRAM and FLASH EEPROMs. And it can provide output voltages of different levels at the same time, so it also be used in the graphic card that is more complex than before.
In this thesis, a charge pump voltage converter with push-pull type structure is proposed. In addition to the conventional dc voltage, this charge pump with different kinds of output stage can also generate an ac output voltage that is multiple times of the supply voltage.
The push-pull structure can also stabilize the dc output voltage signal in addition to the generating of the ac output voltage signal. Besides, the high-side switches of the circuit are driven by the use of cross-coupled method. There is no need to provide an extra driving signal for the high-side switches like the conventional charge pumps. Difficulty of design can be greatly reduced.
During design and analysis stages, the HSPICE is used for the simulation and modification of the circuit. Finally we compared the discrete circuit experiments with the simulation results, and verified the correctness of the circuit application. And we proved that it can be used to generate an ac output voltage that is different from the conventional circuits.
Subjects
電荷泵
Charge Pump
Type
thesis
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