A Wideband Two-Way Digital Doherty Transmitter in 40nm CMOS

Beikmirza, M.R.; Shen, Y.; de Vreede, L.C.N.; Alavi, S.M.

doi:10.1109/IMS37962.2022.9865506

A Wideband Two-Way Digital Doherty Transmitter in 40nm CMOS

Conference paper (2022)

Authors

M.R. Beikmirza Electronics -

Y. Shen Electronics -

L.C.N. de Vreede Electronics -

S.M. Alavi Electronics -

Research Group

Electronics () (TU Delft)

DOI: https://doi.org/10.1109/IMS37962.2022.9865506

Efficient Wideband CMOS Doherty DTX RF-DAC Balun Cartesian, class-E Digital power amplifier DPD

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Published Date

2022

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronics

Abstract

A 40nm CMOS wideband digital Cartesian push-pull inverted Doherty operating in class-E is presented. Wideband Doherty operation is achieved over a 1.9-to-3GHz frequency band, using an off-chip power combining network. The fully digital transmitter (DTX) provides 25.3dBm peak power with a drain/DTX line-up efficiency (DE/SE) of 58.7%/44.9%, respectively, at 2.4GHz. When operated with a 160MHz 256-QAM OFDM signal, it achieves 46.1%/32.7% average DE/SE, with an ACLR and EVM better than −40.6dBc and −33.9dB, respectively, using a simple memory-less digital pre-distortion (DPD).

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