A 0.5-3 GHz I/Q Interleaved Direct-Digital RF Modulator with up to 320 MHz Modulation Bandwidth in 40 nm CMOS
| Autor: | Morteza S. Alavi, Yiyu Shen, R.J. Bootsman, Leonardus Cornelis Nicolaas De Vreede |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
business.industry 020208 electrical & electronic engineering RF power amplifier RF modulator 02 engineering and technology CMOS Modulation 0202 electrical engineering electronic engineering information engineering Optoelectronics Radio frequency Wideband business Quadrature amplitude modulation Spectral purity |
| Zdroj: | CICC |
| Popis: | This paper presents a wideband, $2\times 12$ -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. |
| Databáze: | OpenAIRE |
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