专利名称：DC-DC converter for power level tracking
power amplifiers
发明人：Jau H. Chen,Joseph Staudinger申请号：US11068272申请日：20050228
公开号：US20060192536A1公开日：20060831
专利附图：
摘要：A DC-to-DC converter as described herein is suitable for use as a variablevoltage supply for an RF power amplifier. The DC-to-DC converter includes a buckconverter for providing relatively low voltage and current output, and a linear voltage
regulator for providing relatively high voltage and current output. When operating in abuck converter mode, the DC-to-DC converter disables the linear voltage regulator, thusproviding efficient low-level operation. When operating in a linear regulator mode, theDC-to-DC converter enables the linear voltage regulator while maintaining at least somecurrent flow through the buck converter; this is accomplished by keeping an outputtransistor of the buck converter continuously on during the linear regulator mode. TheDC-to-DC converter can transition between operating modes in a smooth manner thatdoes not result in discontinuous voltage drops.
申请人：Jau H. Chen,Joseph Staudinger
地址：Atlanta GA US,Gilbert AZ US
国籍：US,US
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