Design and analysis of a high efficiency linear power amplifier |
| |
| Authors: | Sucheng Liu Luowei Zhou Xiaodong Liu Weiguo Lu |
| |
| Affiliation: | 1. State Key Laboratory of Power Transmission Equipment and System Security and New Technology , Chongqing University , Chongqing 400044, PR China liusucheng@gmail.com;3. State Key Laboratory of Power Transmission Equipment and System Security and New Technology , Chongqing University , Chongqing 400044, PR China;4. Key Laboratory of Power Electronics and Motion Control , Anhui University of Technology , Ma’anshan 243002, PR China |
| |
| Abstract: | A high efficiency linear power amplifier is introduced based on the idea of Switch-Linear Hybrid (SLH) power conversion. The SLH power amplifier developed from the conventional class B power amplifier, while the class B configuration power unit in the SLH power amplifier is fed by a dynamic switching power supply, not the usual constant DC power supply. Thus, the efficiency of the class B configuration power unit in SLH power amplifier can be greatly improved. By combining linear power amplifier with switching power supply, the SLH power amplifier has synthetic performance of high fidelity, high efficiency and excellent dynamic characteristics. In this article, analysis of SLH power amplifier is performed, especially focusing on its linear power unit which is the core of SLH power amplifier. Design considerations are also presented parallel with the analysis. Both the theoretical analysis and experimental results verify the validity of SLH power amplifier. |
| |
| Keywords: | linear power amplifier emitter follower high efficiency switching power supply switch-linear hybrid |
|
|
