A Fully Integrated DC/DC Converter for Tunable RF Filters

摘要

A Controllable high voltage DC/DC converter has been designed that can generate an output voltage from 0 to 30V with a 2.8V supply voltage. It is suitable for controlling MEMS and high voltage varicap devices in tunable filters. The proposed DC/DC converter uses a novel approach to decrease the output voltage by cascading two Dickson charge pumps [1]. It is operating with a clock frequency of 16MHz and is built in a 0.25μm Bi-CMOS technology.