A new high efficiency RF switch-mode power amplifier architecture for pulse encoded signals

2012 ◽  
Author(s):  
Sheikh Nijam Ali ◽  
Thomas Johnson
Keyword(s):  
Power Amplifier ◽  
High Efficiency ◽  
Rf Switch ◽  
Switch Mode

The Output Researching of a Cascaded Multilevel Class-D Power Amplifier

2012 ◽  
Vol 482-484 ◽  
pp. 3-10
Author(s):  
Guo Hua Xu ◽  
Ying Zhang ◽  
Ming Dong ◽  
Qing De Meng
Keyword(s):  
Power Amplifier ◽  
Single Phase ◽  
High Efficiency ◽  
Pwm Control ◽  
Circuit Topology ◽  
Class D ◽  
Switch Mode

A high efficiency switch-mode power amplifier based on a cascaded multicell multilevel circuit topology is introduced in the paper. A multicell topology being operated in a unipolar phase-shifted PWM control to switch-mode amplifier system is introduced. After analysising a single-phase H-bridge unipolar PWM inverter’s output, the paper emphasis on the researching of the output of a Cascaded Multilevel Class-D Power Amplifier. The paper analyzes the advanced characteristic of the cascaded multilevel technique. Then a cascaded multilevel class-D power amplifier is built in the laboratory. The result of measurement shows a good following performance and stability.

An Equal-Area Criterion Based Pulse Encoding Strategy for RF Switch-Mode Power Amplifier

Frequenz ◽  
2019 ◽  
Vol 73 (1-2) ◽  
pp. 53-62 ◽  
Author(s):  
Jianbin Chen ◽  
Fuqiang Yao ◽  
Jiang Zhang ◽  
Zhihu Wei
Keyword(s):  
Power Amplifier ◽  
Pulse Train ◽  
Signal To Noise Ratio ◽  
Rf Switch ◽  
Equal Area ◽  
Coding Efficiency ◽  
Delta Sigma ◽  
Switch Mode ◽  
Multi Level ◽  
Encoding Strategy

Abstract A novel pulse encoding strategy for RF switch-mode power amplifier (SMPA) is proposed in this paper to achieve benefits of multi-level delta-sigma modulators (DSM) while alleviating challenges that multi-level DSM brings to SMPA. The pulse encoder consists of a multi-level delta-sigma modulators (DSM) followed by a level transformation module (LTM). Based on the equal-area criterion, LTM directly maps the multi-level DSM pulse train into a binary pulse train which enables a simple system configuration. The feasibility and effectiveness of proposed strategy are verified by numerical simulation and experimental measurement. Results show that, with a similar coding efficiency, the proposed strategy obtains more than 7 dB improvement in average in-band signal to noise ratio (SNR) compared to traditional two-level DSM.

A Package-Integrated Chireix Outphasing RF Switch-Mode High-Power Amplifier

2013 ◽  
Vol 61 (10) ◽  
pp. 3721-3732 ◽  
Author(s):  
David A. Calvillo-Cortes ◽  
Mark P. van der Heijden ◽  
Mustafa Acar ◽  
Michel de Langen ◽  
Robin Wesson ◽  
...  
Keyword(s):  
Power Amplifier ◽  
High Power ◽  
Rf Switch ◽  
High Power Amplifier ◽  
Switch Mode

A High Efficiency Class-E Power Amplifier Over a Wide Power Range Using a Look-Up Table Based Dynamic Biasing Scheme

2015 ◽  
Vol E98.C (4) ◽  
pp. 377-379
Author(s):  
Jonggyun LIM ◽  
Wonshil KANG ◽  
Kang-Yoon LEE ◽  
Hyunchul KU
Keyword(s):  
Power Amplifier ◽  
High Efficiency ◽  
Look Up Table ◽  
Dynamic Biasing ◽  
Class E
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