Techniques of envelope tracking transmitter for base-station and mobile applications

In this paper, we propose enhanced architectures of an envelope tracking (ET) transmitter. For base-station applications, high efficient ET transmitter architectures are implemented using optimized power amplifier (PA) with a 2-bit envelope amplifier (EA) and a multi-biased linear EA. In addition, fully integrated multi-band/multi-mode ET transmitter is implemented using a multi-band PA incorporating an integrated on-chip linearizer with a multi-mode dual-switching EA for mobile applications. ET transmitters that achieve an overall efficiency as high as 47.8% in 10MHz LTE base-station and 28% in 5MHz LTE mobile applications are presented.

[1]  Peter M. Asbeck,et al.  Wideband high efficiency digitally-assisted envelope amplifier with dual switching stages for radio base-station envelope tracking power amplifiers , 2010, 2010 IEEE MTT-S International Microwave Symposium.

[2]  Peter M. Asbeck,et al.  Effect of maximum power supply voltage on envelope tracking power amplifiers using GaN HEMTs , 2011, 2011 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications.

[3]  Chul Soon Park,et al.  A hybrid envelope amplifier with switching-controlled structure for EDGE/WCDMA/LTE reconfigurable transmitters , 2012, 2012 IEEE/MTT-S International Microwave Symposium Digest.

[4]  Chul Soon Park,et al.  High-Efficiency Envelope-Tracking Transmitter With Optimized Class-${\hbox{F}}^{-1}$ Amplifier and 2-bit Envelope Amplifier for 3G LTE Base Station , 2011, IEEE Transactions on Microwave Theory and Techniques.

[5]  Chul Soon Park,et al.  A Fully Integrated Triple-Band CMOS Class-E Power Amplifier With a Power Cell Resizing Technique and a Multi-Tap Transformer , 2013, IEEE Microwave and Wireless Components Letters.

[6]  Chul Soon Park,et al.  A CMOS Envelope-Tracking Transmitter With an On-Chip Common-Gate Voltage Modulation Linearizer , 2014, IEEE Microwave and Wireless Components Letters.

[7]  Chul Soon Park,et al.  A fully integrated triple-band CMOS hybrid-EER transmitter for WCDMA/LTE applications , 2014, 2014 IEEE MTT-S International Microwave Symposium (IMS2014).

[8]  Chul Soon Park,et al.  Single-Ended CMOS Doherty Power Amplifier Using Current Boosting Technique , 2014, IEEE Microwave and Wireless Components Letters.

[9]  Jeonghyeon Cha,et al.  Highly efficient envelope tracking transmitter by utilizing sinking current , 2011, 2011 6th European Microwave Integrated Circuit Conference.

[10]  P. Asbeck,et al.  High-Efficiency WCDMA Envelope Tracking Base-Station Amplifier Implemented With GaAs HVHBTs , 2008, IEEE Journal of Solid-State Circuits.

[11]  Chul Soon Park,et al.  Envelope Amplifier With Multiple-Linear Regulator for Envelope Tracking Power Amplifier , 2013, IEEE Transactions on Microwave Theory and Techniques.

[12]  Songcheol Hong,et al.  A Hybrid Polar-LINC CMOS Power Amplifier With Transmission Line Transformer Combiner , 2013, IEEE Transactions on Microwave Theory and Techniques.

[13]  Jinsung Choi,et al.  A Polar Transmitter With CMOS Programmable Hysteretic-Controlled Hybrid Switching Supply Modulator for Multistandard Applications , 2009, IEEE Transactions on Microwave Theory and Techniques.

[14]  Peter M. Asbeck,et al.  A CMOS dual-switching power-supply modulator with 8% efficiency improvement for 20MHz LTE Envelope Tracking RF power amplifiers , 2013, 2013 IEEE International Solid-State Circuits Conference Digest of Technical Papers.