Name
Title | ||
|---|---|---|
Design of A Transformer-Based Reconfigurable Digital Polar Doherty Power Amplifier Fully Integrated in Bulk CMOS |
Abstract | ||
|---|---|---|
This paper presents a digital polar Doherty power amplifier (PA) fully integrated in a 65 nm bulk CMOS process. It achieves +27.3 dBm peak output power and 32.5% peak PA drain efficiency at 3.82 GHz and 3.60 GHz, respectively. The proposed digital Doherty PA architecture optimizes the cooperation of the main and auxiliary amplifiers and achieves superior back-off efficiency enhancement (a maximum 47.9% improvement versus the corresponding Class-B operation). This digital intensive architecture also allows in-field PA reconfigurability which both provides robust PA operation against antenna mismatches and allows flexible trade-off optimization on PA efficiency and linearity. Transformer-based passives are employed as the Doherty input and output networks. The input 90 signal splitter is realized by a 6-port folded differential transformer structure. The active Doherty load modulation and power combining at the PA output are achieved by two transformers in a parallel configuration. These transformer-based passives ensure an ultra-compact PA design (2.1 mm ) and broad bandwidth (24.9% for 1 dB P bandwidth). Measurement with 1 MSym/s QPSK signal shows 3.5% rms EVM with +23.5 dBm average output power and 26.8% PA drain efficiency. Measurement with 16-QAM signal exhibits the PA's flexibility on optimizing efficiency and linearity. |
Year | DOI | Venue |
|---|---|---|
2015 | 10.1109/JSSC.2015.2415494 | J. Solid-State Circuits |
Keywords | Field | DocType |
integrated circuit design,bandwidth,radio frequency,efficiency,modulation,evm,cmos integrated circuits,quadrature amplitude modulation,impedance,linearity,inductors | Computer science,Linearity,Transformer,Inductor,Electronic engineering,CMOS,Modulation,Polar modulation,Electrical engineering,Amplifier,Linear variable differential transformer | Journal |
Volume | Issue | ISSN |
50 | 5 | 0018-9200 |
Citations | PageRank | References |
16 | 0.81 | 27 |
Authors | ||
5 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Song Hu | 1 | 50 | 5.44 |
| Shouhei Kousai | 2 | 127 | 18.37 |
| Jong Seok Park | 3 | 58 | 9.31 |
| Outmane Lemtiri Chlieh | 4 | 16 | 0.81 |
| Hua Wang | 5 | 124 | 16.15 |