Research on a flexible waveform power amplifier adopting Switch-Linear Hybrid(SLH) Scheme

A novel power amplifier adopting switch-linear hybrid scheme (SLH-FWPA) is introduced to accomplish flexible waveforms power amplification in a high bandwidth at high output power rating. The final output stage of SLH-FWPA is derived from linear power amplifier architecture to maintain excellent output quality and well dynamic performance; and meanwhile using tracking power supplies for the linear output stage to acquire total system efficiency above 80% generally. Theoretic analysis for SLH-FWPA is given and experimental results verify the implementation of SLH-FWPA.

[1]  Xiaodong Liu,et al.  A Flexible Waveform Power Amplifier Based on Switch-Linear Hybrid Scheme , 2007, 2007 2nd IEEE Conference on Industrial Electronics and Applications.

[2]  Seigoh Kashiwagi.  A High-Efficiency Audio Power Amplifier Using a Self-Oscillating Switching Regulator , 1985, IEEE Transactions on Industry Applications.

[3]  Alfred Rufer,et al.  An overview of the technique of asymmetrical multilevel inverters , 2005 .

[4]  K. Iwaya,et al.  100 kHz, 10 kW switching type power amplifier using multilevel inverter , 2001, 4th IEEE International Conference on Power Electronics and Drive Systems. IEEE PEDS 2001 - Indonesia. Proceedings (Cat. No.01TH8594).

[5]  Gyu-Hyeong Cho,et al.  A high efficiency class A amplifier accompanied by class D switching amplifier , 1997, PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972.

[6]  Bin Wu,et al.  Switch-Linear Hybrid Power Conversion (I) - The Topologies Based on Source Follower , 2006, 2006 1ST IEEE Conference on Industrial Electronics and Applications.

[7]  S. B. Leeb,et al.  A digitally controlled amplifier with ripple cancellation , 2003 .

[8]  P. Midya,et al.  Digital correction of PWM switching amplifiers , 2004, IEEE Power Electronics Letters.

[9]  J. Kolar,et al.  High-frequency isolated DC/DC converter for input voltage conditioning of a linear power amplifier , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..