Name
Abstract | ||
|---|---|---|
In this paper, we introduce the multiphase switched capacitor power amplifier (MP-SCPA). The MP-SCPA is a digital power amplifier (DPA) that achieves a linear output response using a vector summation of two amplitude weighted constant phase signals. In this way, it avoids using a wideband phase modulator that is required in other DPAs. The MP-SCPA is subject to non-linearity induced by bondwires and other packaging associated inductance that causes variation in the voltage supply available on-chip. To correct for this packaging based non-linearity, we propose a polar digital pre-distortion that is more robust and requires less chip area than traditional lookup table based methods. A prototype MP-SCPA is measured with the polar DPD and found to have similar performance when compared with a dense lookup table based DPD. The MP-SCPA is measured with a 5 MHz, 64 QAM LTE signal and achieves a measured ACLR < -30 dBc, an EVM=3.4%-rms and an average system efficiency of 15.8%. |
Year | Venue | Keywords |
|---|---|---|
2017 | 2017 IEEE CUSTOM INTEGRATED CIRCUITS CONFERENCE (CICC) | class-D PA, Digital PA, EER, switched-capacitor PA, SCPA, digital pre-distortion, DPD |
Field | DocType | Citations |
Wideband,Lookup table,Phase modulation,Quadrature amplitude modulation,Inductance,Computer science,Electronic engineering,Chip,Linearization,Amplifier | Conference | 0 |
PageRank | References | Authors |
0.34 | 10 | 4 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Ali Azam | 1 | 5 | 3.18 |
| Zhi-Dong Bai | 2 | 85 | 29.46 |
| Wen Yuan | 3 | 34 | 5.20 |
| Jeffrey S. Walling | 4 | 163 | 19.89 |