A Time-Mode-Modulation Digital Quadrature Power Amplifier Based on 1-bit Delta-Sigma Modulator and Transformer Combined FIR FIlter
- Resource Type
- Conference
- Authors
- Zhang, Yuncheng; Sun, Zheng; Liu, Bangan; Qiu, Junjun; Xu, Dingxin; Zhang, Yi; Fu, Xi; You, Dongwon; Huang, Hongye; Madany, Waleed; Fadila, Ashbir Aviat; Liu, Zezheng; Wang, Wenqian; Xiong, Yuang; Shirane, Atsushi; Okada, Kenichi
- Source
- 2023 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits) VLSI Technology and Circuits (VLSI Technology and Circuits), 2023 IEEE Symposium on. :1-2 Jun, 2023
- Subject
- Components, Circuits, Devices and Systems
Degradation
Quantization (signal)
Finite impulse response filters
Power amplifiers
Modulation
Very large scale integration
Transformers
Power Amplifier
DSM
Quadrature
CMOS
DPD
- Language
- ISSN
- 2158-9682
This paper proposes a Time-Mode Modulation (TMM) digital quadrature power amplifier (PA), which can realize high efficiency at power back-off (PBO) by applying the proposed 1-bit DSM and transformer (XFMR) combined FIR filter. The 1-bit Delta-Sigma Modulator (DSM) and digital mixer encode the input into a 2-level intrinsically linear on/off signal for TMM operation. The XFMR combined FIR filter suppresses the DSM quantization noise to avoid efficiency degradation and is insensitive to delay mismatches. The TMM PA is fabricated in 65 nm CMOS. Without digital pre-distortion (DPD), it achieves 26.4% efficiency with 40MS/s 64-QAM at 2.6GHz and supports 256-QAM.