Name
Abstract | ||
|---|---|---|
This paper presents a new hybrid-mode SCPA that segments a traditional SCPA into two segments. An LSB C-2C sub-array is modulated using a ΔΣ modulator (DSM) connected in parallel with a Nyquist-rate unary MSB array. This technique enables a hybrid SCPA (H-SCPA) that can achieve a higher bandwidth than a traditional DSM DAC, while achieving a higher resolution than a traditional Nyquist DAC. A prototype design is implemented in 65nm CMOS and post-extracted simulation results validate the performance of the H-SCPA. The H-SCPA achieves a peak output power of 23.5 dBm and a peak system efficiency of 48% at an operating frequency of 2.8 GHz. When amplifying a 20 MHz, 64 QAM, OFDM signal, the average output power and system efficiency at 2.8 GHz are 17.4 dBm and 24.9 %, respectively, while achieving an error vector magnitude (EVM) of 1.9 %-rms and meeting the spectral mask requirements. |
Year | DOI | Venue |
|---|---|---|
2018 | 10.1109/MWSCAS.2018.8623974 | 2018 IEEE 61st International Midwest Symposium on Circuits and Systems (MWSCAS) |
Keywords | Field | DocType |
delta-sigma DAC,hybrid DAC,Nyquist DAC,Switched Capacitor Power Amplifier (SCPA) | Quadrature amplitude modulation,Computer science,Spectral mask,CMOS,Modulation,Electronic engineering,Bandwidth (signal processing),Nyquist–Shannon sampling theorem,Nyquist rate,Orthogonal frequency-division multiplexing | Conference |
ISSN | ISBN | Citations |
1548-3746 | 978-1-5386-7393-5 | 0 |
PageRank | References | Authors |
0.34 | 0 | 5 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Qiuyan Xu | 1 | 0 | 0.34 |
| Subhanshu Gupta | 2 | 65 | 10.52 |
| Ali Azam | 3 | 5 | 3.18 |
| Zhi-Dong Bai | 4 | 85 | 29.46 |
| Jeffrey S. Walling | 5 | 163 | 19.89 |