Paper Info
Title
2.8 A broadband CMOS digital power amplifier with hybrid Class-G Doherty efficiency enhancement
Abstract
Spectrum-efficient modulations in modern wireless systems often result in large peak-to-average power ratios (PAPRs) for the transmitted signals. Therefore, PA efficiency at deep power back-off (PBO) levels (e.g., -12dB) becomes critical to extend the mobile's battery life. Classic techniques, i.e., outphasing, envelope tracking, and Doherty PAs, offer marginal efficiency improvement at deep PBO in practice. Dual-mode PAs require switches at the PA output for high-/low-power mode selection [1,2], posing reliability and linearity challenges. Although simple supply switching (Class-G) is effective at deep PBO, it only offers Class-B-like PBO efficiency in each supply mode [3,4]. Multi-level outphasing PA requires multiple supplies and frequent supply switching [5], resulting in substantial DC-DC converter overhead and exacerbated switching noise.
Year
DOI
Venue
2015
10.1109/ISSCC.2015.7062917
ISSCC
Keywords
Field
DocType
cmos integrated circuits,deep power back-off,spectrum-efficient modulations,exacerbated switching noise,hybrid class-g doherty efficiency enhancement,dc-dc power convertors,power amplifiers,dc-dc converter overhead,broadband cmos digital power amplifier,pa efficiency,wideband amplifiers,supply switching,switches,modulation,bandwidth,radio frequency
Computer science,Linearity,CMOS,Radio frequency,Electronic engineering,Modulation,Broadband,Bandwidth (signal processing),Battery (electricity),Electrical engineering,Amplifier
Conference
Citations 
PageRank 
References 
7
0.69
5
Authors
3
Name
Order
Citations
PageRank
Song Hu1505.44
Shouhei Kousai212718.37
Hua Wang3509.31