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Design and Simulation of a Wideband Hybrid EnvelopeTracking Power Amplifier Using LDMOS Transistor

Iman Arianyan, Abdolali Abdipour, Abbas Mohammadi, Ehsan Arianyan
2012 International Journal of Computer and Electrical Engineering  
Index Terms-Envelope elimination and restoration, envelope amplifier, power amplifier.  ...  There are many methods for improving the efficiency of the power amplifier, one of which is Hybrid EER that we use. In this technique, the signal is divided into two parts.  ...  ENVELOPE TRACKING III. ENVELOPE ELIMINATION AND RESTORATION EER uses a combination of a high efficiency switch-mode PA with an envelope re-modulation circuit [14] .  ... 
doi:10.7763/ijcee.2012.v4.608 fatcat:sguzjtlsbner7kccloicyng5ji

High efficiency power amplifier based on envelope elimination and restoration technique

M. Vasic, O. Garcia, J.A. Oliver, P. Alou, D. Diaz, J.A. Cobos, A. Gimeno, J.M. Pardo, C. Benavente, F.J. Ortega
2010 2010 IEEE Energy Conversion Congress and Exposition  
Kahn's technique based on envelope elimination and restoration (EER) is based on idea that high efficiency power supply (envelope amplifier) could be used to modulate the envelope of high efficient non  ...  Index Terms-Kahn's technique, envelope elimination and restoration, envelope amplifier, power amplifier, multilevel converter  ...  One of them is called Kahn's Technique or Envelope Elimination and Restoration (EER) Technique [2] .  ... 
doi:10.1109/ecce.2010.5617763 fatcat:na3dyno2grevbizonfwne3hr5y

A Fast CMOS Self-Oscillating Modulator for RF Power Amplifier

Xin Jie Wang, Tad Kwasniewski
2007 2007 Canadian Conference on Electrical and Computer Engineering  
This paper presents a fast CMOS self-oscillating modulator for RF power amplifier.  ...  This modulator has been designed in 0.18-µm CMOS technology which occupies an area of 1.5×2 mm 2 and consists of an envelope detector, an envelope amplifier, a fast comparator and an output buffer.  ...  ACKNOWLEDGMENT The authors are grateful to CMC Microsystems for the financial support on fabrication.  ... 
doi:10.1109/ccece.2007.99 fatcat:kdbizygnebef3jj5l5ebjnibpm

A Review of Envelope Tracking Power Supply for Mobile Communication Systems

Xinbo Ruan
2017 CPSS Transactions on Power Electronics and Applications  
., Doherty, envelope elimination and restoration (EER), and envelope tracking (ET) techniques, to greatly improve the efficiency of the power amplifiers are analyzed and compared in this paper, and it  ...  Finally, the methods, including soft-switching, slow envelope, and band separation are proposed for further increasing the efficiency of the ET power supply.  ...  In conclusion, the ET power supply should achieve both wide bandwidth and high efficiency. TABLE II gives the PAPR and bandwidth of the envelope signal for different mobile communication systems.  ... 
doi:10.24295/cpsstpea.2017.00026 fatcat:c2qndno56vevxffepe7hfbkmgq

A Potential Transmitter Architecture for Future Generation Green Wireless Base Station

Vandana Bassoo, Kevin Tom, AK Mustafa, Ellie Cijvat, Henrik Sjoland, Mike Faulkner
2009 EURASIP Journal on Wireless Communications and Networking  
The all-digital transmitter architecture uses a combination of envelope elimination and restoration (EER) and pulse width modulation (PWM)/pulse position modulation (PPM) modulation.  ...  The performance of this architecture is predicted from the measured output power and efficiency curves of a GaN amplifier. 57% efficiency is obtained for an OFDM signal limited to 8 dB peak to average  ...  This has lead to a renewed interest in architectures such as linear amplification with nonlinear components (LINCs), envelope elimination and restoration (EER), and pulse width modulation (PWM) [3] [4  ... 
doi:10.1155/2009/821846 fatcat:qzketpf24nanlhqbkmt5tfsg4i

Performance of Efficient CMOS Power Amplifier for ISM Band Applications

This article describes the different state-of-the-art design biasing class and advanced RF CMOS power amplifier for Industrial, Scientific, and Medical (ISM) band applications.  ...  The efficiency of the power amplifier can be 100%, but practically it is just 55%. So, the scope of improvement in efficiency in a power amplifier will be an interesting and most challenging task.  ...  in envelope elimination and restoration systems and increases the complexity for predistortion.  ... 
doi:10.35940/ijitee.b9022.129219 fatcat:mlf4wx46obdd5mqt7srxgfl2ce

Linearization of Highly-Efficient Monolithic Class E SiGe Power Amplifiers with Envelope-Tracking (ET) and Envelope-Elimination-and-Restoration (EER) at 900MHz

Donald Y.C. Lie, J.D. Popp, F. Wang, D. Kimball, L.E. Larson
2007 2007 6th IEEE Dallas Circuits and Systems Workshop on System-on-Chip  
The linearization of highly efficient monolithic SiGe Class E power amplifiers (PAs) using both Envelope-Tracking (ET) and Envelope-Elimination-and-Restoration (EER) techniques has been studied at 900MHz  ...  The overall PAE of an ET-linearized PA system is 45% at an output power of 20dBm for an 881MHz EDGE (Enhanced Data Rate for GSM Evolution) modulated signal.  ...  Asbeck and Mr. P. Draxler at UCSD for valuable discussions. We thank DoD for support and IBM for IC fabrication.  ... 
doi:10.1109/dcas.2007.4433211 fatcat:4iiio7fjnrbttguupmhgwjar6i

A Monolithic High-Efficiency 2.4-GHz 20-dBm SiGe BiCMOS Envelope-Tracking OFDM Power Amplifier

Feipeng Wang, Donald F. Kimball, Donald Y. Lie, Peter M. Asbeck, Lawrence E. Larson
2007 IEEE Journal of Solid-State Circuits  
The two-stage amplifier exhibits 12-dB gain, 5% EVM, 20-dBm OFDM output power, and an overall efficiency (including the envelope amplifier) of 28%.  ...  The 4-mm 2 die includes a high-efficiency high-precision envelope amplifier and a two-stage SiGe HBT PA for RF amplification. Off-chip digital predistortion is employed to improve EVM performance.  ...  WIDEBAND COLLECTOR/DRAIN MODULATION PA APPROACHES Dynamic power-supply schemes are usually separated into two types: envelope elimination and restoration (EER) and envelope tracking (ET).  ... 
doi:10.1109/jssc.2007.897170 fatcat:mdfeighmizgjdp7zlzohqufhpa

Envelope Following-Based RF Transmitters Using Switching-Mode Power Amplifiers

J.-K. Jau, Y.-A. Chen, T.-S. Horng, J.-Y. Li
2006 IEEE Microwave and Wireless Components Letters  
a wide range of modulated output power.  ...  The use of predistorted envelope and quadrature-modulated signals can linearize the nonlinear behavior with fairly high average efficiency.  ...  through the supply voltage onto a phase-modulated carrier, as used in the envelope elimination and restoration (EER) transmitters [3] , [4] .  ... 
doi:10.1109/lmwc.2006.879471 fatcat:m56seywkjzhsjj4mu6uonhjqiu

Class-E amplifiers and applications at MF, HF, and VHF

Arturo Mediano, Francisco Javier Ortega-Gonzalez
2017 2017 IEEE MTT-S International Microwave Symposium (IMS)  
so long for switch-mode high-efficiency amplification techniques to be widely accepted.  ...  1970s and 1980s were slow and exhibited low power gain, and switch-mode operation of transistors was considered appropriate only for "low-frequency" power supplies, not RF power amplification.  ...  The amplitude modulation of the supply voltage in the final stage restores the envelope and thus recreates the desired signal.  ... 
doi:10.1109/mwsym.2017.8058853 fatcat:i7keco7g4ffd3hncre6jepsib4

A Discrete-Amplitude Pulse Width Modulation for a High-Efficiency Linear Power Amplifier

Young-Sang Jeon
2011 ETRI Journal  
The RF pulse train is amplified by a switching-mode power amplifier, and the original RF input signal is restored by a band pass filter.  ...  A new discrete-amplitude pulse width modulation (DAPWM) scheme for a high-efficiency linear power amplifier is proposed.  ...  Envelope elimination and restoration (EER) is one of the most efficient linear radio frequency (RF) power amplification systems and its efficiency is ideally 100%.  ... 
doi:10.4218/etrij.11.0110.0560 fatcat:cahf5dm2abh57ofyvp2blgtf2m

An Improved Power-Added Efficiency 19-dBm Hybrid Envelope Elimination and Restoration Power Amplifier for 802.11g WLAN Applications

Feipeng Wang, Donald F. Kimball, Jeremy D. Popp, Annie Hueiching Yang, Donald Y. Lie, Peter M. Asbeck, Lawrence E. Larson
2006 IEEE transactions on microwave theory and techniques  
A comparison of envelope elimination and restoration (EER) and envelope tracking (ET) is discussed and a "hybrid" wideband EER power amplifier (PA) for the WLAN 802.11g system is proposed.  ...  An experimental "hybrid" Class-E EER system shows an overall efficiency (modulated RF output power/envelope amplifier dc input power) of 36% and power-added efficiency (the modulated RF output power/envelope  ...  In this paper, we propose a "hybrid" wideband envelope elimination and restoration (EER) dynamic supply scheme with a wideband envelope amplifier for WLAN OFDM applications.  ... 
doi:10.1109/tmtt.2006.885575 fatcat:abliavtr6vghrob2ppt2bu4fju

CMOS Integrated Switched-Mode Transmitters for Wireless Communication [chapter]

Ellie Cijvat
2010 Advances in Solid State Circuit Technologies  
In order to address efficiency and linearity issues, different transmitter architectures have been proposed and implemented throughout the years, such as for instance Envelope Elimination and Restoration  ...  However, efficiency over a wide power range is still a major concern, as will be shown. In this chapter an overview of switched-mode power amplifiers will be presented.  ...  Fig. 8 . 8 Simulated drain efficiency for a CMOS class-D amplifier in different architectures, such as Envelope Elimination and Restoration (EER), Envelope Tracking (ET), and Pulse Width Modulation by  ... 
doi:10.5772/8626 fatcat:hv6yajrcsretbapmzeibz5ekfa

Design Options for High Efficiency Linear Handset Power Amplifiers

P. Asbeck, L. Larson, D. Kimball, S. Pornpromlikit, J.-H. Jeong, C. Presti, T. P. Hung, F. Wang, Y. Zhao
2009 2009 IEEE Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems  
Design techniques for handset power amplifiers are discussed, with emphasis on high efficiency architectures and CMOS technology.  ...  Experimental results with prototype circuits including Doherty, envelope tracking, outphasing and digital polar modulation are presented. Future design challenges are also highlighted.  ...  Envelope tracking (ET) and Envelope Elimination and Restoration (EER) systems operate by rapidly varying the power supply voltage in accordance with the modulation, keeping the RF transistor near saturation  ... 
doi:10.1109/smic.2009.4770542 fatcat:z6zjucieund3dbovlfr7vrby7m

Power amplifiers and transmitters for RF and microwave

F.H. Raab, P. Asbeck, S. Cripps, P.B. Kenington, Z.B. Popovic, N. Pothecary, J.F. Sevic, N.O. Sokal
2002 IEEE transactions on microwave theory and techniques  
Power amplifiers are incorporated into transmitters in a similarly wide variety of architectures, including linear, Kahn, envelope tracking, outphasing, and Doherty.  ...  Each application has its own unique requirements for frequency, bandwidth, load, power, efficiency, linearity, and cost.  ...  Kahn Technique The Kahn envelope elimination and restoration (EER) technique (Fig. 15 ) combines a highly efficient, but nonlinear RF PA with a highly efficient envelope amplifier to implement a high-efficiency  ... 
doi:10.1109/22.989965 fatcat:4m73k6einvdodg6ezn36k7kmhq
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