A Single Path Digital-IF Receiver Supporting Inter/Intra 5-CA With a Single Integer LO-PLL in 14-nm CMOS FinFET

• Published in: IEEE journal of solid-state circuits Vol. 57; no. 12; pp. 3646 - 3655
• Main Authors: Sung, Barosaim, Seok, Hyun-Gi, Kim, Jaekwon, Lee, Jaehoon, Jang, Taejin, Jang, Ilhoon, Kim, Youngmin, Yu, Anna, Jang, Jong-Hyun, Lee, Jiyoung, Bae, Jeongyeol, Park, Euiyoung, Lee, Sungjun, Lee, Seokwon, Kim, Joohan, Kim, Beomkon, Lim, Yong, Oh, Seunghyun, Lee, Jongwoo
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.12.2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: 5G mobile communication; Carrier Aggregation; cellular radio frequency (RF) receiver (RX); CMOS; digital super-heterodyne; digital-intermediate frequency (IF); E-UTRA NR dual connectivity (EN-DC); Interference; Intermediate frequencies; Mixers; Phase locked loops; Power consumption; Radio frequency; Radiofrequency integrated circuits; Receivers; Software radio; software-defined-radio (SDR); sub-6 GHz new radio (NR); Transformers
• ISSN: 0018-9200; 1558-173X
• DOI: 10.1109/JSSC.2022.3212375

The world's first 5-carrier aggregation (CA) supporting digital-intermediate frequency (IF) receiver (RX) to support 5G sub-6 GHz new radio (NR) and CA/E-UTRA NR dual connectivity (CA/EN-DC) maintaining 2G and 3G in 14-nm FinFET CMOS technology is presented. Three digital-IF RXs with a shared local oscillator-phase-locked loop (LO-PLL) are integrated for supporting inter-/intra-band 5-CA to reduce power consumption and area of the massive number of RX paths. The RX features nine single-ended low-noise amplifiers (LNAs) with low/mid/high band (L/M/HB) characteristics. It achieves noise figure (NF) of 1.5 dB with 18 dB external LNA gain and +7.6-dBm out-of-band (OOB) input intercept point 3 (IIP3), and input intercept point 2 (IIP2) calibration is not required thanks to IF planning. The RX achieves an error vector magnitude (EVM) of 2.5% by intra-4CA for B1 LTE10MHz and LTE20MHz in one single RX path, as well as inter-3CA for B3, B5, and B7 long-term evolution (LTE) 20 MHz with a shared LO-PLL. The estimated power saving by sharing a single LO-PLL is 17% compared to 3-CA RXs with three separate LO-PLLs.