Design, control and performance of tracking power supply for a linear power amplifier

被引：10

作者：

Gong, G ^{[1
]}

Round, S ^{[1
]}

Kolar, JW ^{[1
]}

机构：

[1] ETH, Swiss Fed Inst Technol, Power Elect Syst Lab, CH-8092 Zurich, Switzerland

来源：

2005 IEEE 36th Power Electronic Specialists Conference (PESC), Vols 1-3 | 2005年

关键词：

D O I：

10.1109/PESC.2005.1582036

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Power amplifiers are widely used in consumer and industrial applications and are based on either a linear power amplifier or switch-mode power amplifier design. By combining the linear power amplifier with a switch-mode tracking power supply, a hybrid power amplifier is formed that maintains a high quality output while having a high efficiency. This paper presents a hybrid amplifier that is constructed with a novel boost-type tracking power supply and provides an excellent performance. A design method for the output filter using the Power Supply Ratio Rejection (PSRR) of the linear power amplifier is proposed. This method ensures that the amplifier output voltage has minimal switching frequency components as well as being able to quickly track changes in the output voltage. A control system design method is presented that ensures good performance in the control of the constant inductor current of the switch-mode tracking stage and a high rejection of output voltage disturbances. A laboratory prototype experimentally verifies the theoretical analysis.

引用

页码：2841 / 2847

页数：7

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