WSEAS Transactions on Circuits and Systems
Print ISSN: 1109-2734, E-ISSN: 2224-266X
Volume 15, 2016
Charge Pump for Negative High Voltage Generation with Variable Voltage Gain
Authors: Jun Zhao, Yong-Bin Kim, Kyung Ki Kim
Abstract: In this paper, a new cross-coupled charge pump for negative high voltage generation has been proposed. The problem of shoot-through current in the conventional cross-coupled charge pump is solved by a four clock phase scheme. By switching the power supply to each stage based on the supply voltage, a variable voltage gain is obtained. A complete analysis of the interaction between the power efficiency, area, and frequency are presented. The proposed cross-coupled charge pump has been designed to deliver 40 A with a wide supply range from 2.5V to 5.5V using 0.18 m high voltage LDMOS technology. In order to have a fixed output voltage within -15 3V, the voltage gain of the charge pump circuit is variable from -3X to -7X and is based on the supply voltage.
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Pages: 9-12
WSEAS Transactions on Circuits and Systems, ISSN / E-ISSN: 1109-2734 / 2224-266X, Volume 15, 2016, Art. #2