This paper presents a wideband, 2× 12 -bit I/Q interleaved direct-digital RF modulator (DDRM) realized in 40 nm CMOS technology. The proposed digital-intensive quadrature upconverter features an advanced I/Q-mapping unit cell to boost RF power, in-band linearity, and out-of-band spectral purity. The modulator provides more than 14 dBm RF peak output power. It achieves an ACLR of -52 dBc and an EVM of -40 dB when applying a 20 MHz 256 QAM signal at 2.4 GHz. When applying a 320 MHz 256 QAM signal at 2.4 GHz, the measured ACLR and EVM are better than -43 dBc and -32 dB, respectively, without applying any digital pre-distortion.

Original languageEnglish
Title of host publication2020 IEEE Custom Integrated Circuits Conference, CICC 2020
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages4
Volume2020-March
ISBN (Electronic)9781728160313
DOIs
Publication statusPublished - 1 Mar 2020
Event2020 IEEE Custom Integrated Circuits Conference, CICC 2020 - Boston, United States
Duration: 22 Mar 202025 Mar 2020

Conference

Conference2020 IEEE Custom Integrated Circuits Conference, CICC 2020
Abbreviated title CICC 2020
CountryUnited States
CityBoston
Period22/03/2025/03/20
OtherVirtual/online event due to COVID-19

    Research areas

  • DDRM, Digital-Intensive Transmitter, DPD-free, IQ-Mapping, quadrature up-converter, RFDAC

ID: 73206484